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Importance of secure doors
The door is often the first and most important access point to a home or building. The importance of a secure door goes beyond simply closing off a space: a door is a crucial part of the overall security and largely determines how easy or difficult it is for unauthorized persons to gain access. Security doors contribute to burglary prevention, fire safety and social security, and also play a role in insurance requirements and legal standards.
Features
- Burglar-resistant: equipped with strong material, sturdy hardware and reliable locks.
- Protective: not only prevents theft, but also increases the feeling of safety of residents and users.
- Versatile: applicable to homes, apartments, offices and utility buildings.
- Customizable: modern doors can be equipped with extra security such as multi-point locks, safety glass or electronic access systems.
- Private residences: Front doors and back doors as the first line of defense against burglary.
- Apartment complexes: Access doors with enhanced burglary resistance according to SKG or PKVW standards.
- Commercial buildings: Metal or wooden security sliding doors, often combined with access control systems.
- Public buildings: Schools, hospitals and government institutions, where security and escape routes must be combined.
- Construction: Solid door leaves made of hardwood, steel or composite, often with metal reinforcements.
- Locks and hardware: Multi-point locks, SKG-certified cylinders, security hinges and anti-burglary strips.
- Glazing: Made of laminated safety glass or fire-resistant glass.
- Standards:
- SKG (Stichting Kwaliteit Gevelbouw): star rating for burglary resistance (1–3 stars).
- PKVW (Politiekeurmerk Veilig Wonen): integral guidelines for safe homes.
- European standards (EN 1627-1630): classification of resistance classes RC1–RC6.
- Burglary sensitivity: standard interior doors or weak exterior doors are easy to force.
- Insurance problems: some insurers set requirements for the security level; if security is insufficient, damage may not be fully reimbursed.
- Unsafe feeling: residents or employees may feel unsafe with poor security.
- Higher repair costs: defective doors are more susceptible to break-in damage.
- Building Decree Netherlands: sets minimum requirements for fire and escape safety, but largely leaves burglary resistance to additional quality marks.
- PKVW (Police Mark Safe Housing): encourages the use of SKG locks, good hardware and secure constructions.
- European standards (EN 1627): provide resistance classes for burglary resistance, often required for commercial buildings and high-risk objects.
- Single-family home: front door replaced by SKG*** door with multi-point lock, costs approx. € 1,250.
- Apartment complex: common entrance doors fitted with RC3-certified doors with safety glass, price approx. € 2,100 per door.
- Commercial building: installation of steel security doors with electronic access control, total price € 3,800 per door.
- Focusing only on the lock, while the door construction and hinges are also crucial.
- Using cheap interior doors as exterior doors → very burglary-sensitive.
- Not taking into account quality marks, which means the door does not meet insurance conditions.
- Using glass without safety certification.
Applications
Technical Aspects
Risks with insufficiently secure doors
Laws and regulations
Cost Estimate
|
Type of door / security |
Door cost |
Security options |
Total per door |
|
Standard security door (SKG** lock) |
€ 600 – € 900 |
basic included |
€ 600 – € 900 |
|
Reinforced front door with multi-point lock (SKG***) |
€ 900 – € 1.400 |
€ 150 – € 250 installation |
€ 1.050 – € 1.650 |
|
Steel security door RC3 (utility building) |
€ 1.500 – € 2.500 |
€ 300 – € 500 installation |
€ 1,800 – € 3,000 |
|
High-end door with access control |
€ 2,000 – € 4,000 |
depending on system |
€ 2,500 – € 5,000+ |
Practical examples
Common Mistakes
Conclusion
Secure doors are an essential part of both burglary prevention and the feeling of security within a home or building. Investing in a door with SKG or PKVW certification not only provides better protection, but can also lead to lower insurance premiums and a reduced risk of damage. Costs range from €600 for a standard security door to more than €3,000 for high-end solutions. When comparing quotes via jeofferte.nl, it is advisable not to only look at the price, but also at quality marks, resistance classes and the quality of the hardware.
SKG certification mark for doors and hardware
The SKG certification mark (Stichting Kwaliteit Gevelbouw) is the most important certification for hardware in the Netherlands and plays a crucial role in securing doors against burglary. The certification mark indicates with stars how burglar-resistant a product is. The SKG certification mark is often used in combination with the Politiekeurmerk Veilig Wonen (PKVW) and thus forms a reliable indicator for the safety of doors in homes, apartments and commercial buildings.
Features
- Star system: 1, 2 or 3 stars, depending on the degree of burglar resistance.
- Applicable to various products: cylinder locks, mortise locks, hinges, multi-point locks and hardware.
- Recognizable logo: on all certified products is the SKG logo with the corresponding star indication.
- Widely recognized: accepted by insurers and required for PKVW certification.
- Independently tested: products are tested according to European standards.
Applications
- Interior doors: often only for security doors in apartment complexes.
- Exterior doors: front doors, back doors, balcony doors and garage doors.
- Commercial buildings: access doors of offices, schools and care institutions.
- Specific security: for high-risk objects such as jewelers, warehouses and archive depots.
- SKG (1 star):* standard burglar-resistant, delays burglary up to approx. 3 minutes.
- SKG (2 stars):** heavily burglar-resistant, delays burglary up to approx. 5 minutes.
- SKG* (3 stars):** extra heavily burglar-resistant, delays burglary up to at least 10 minutes.
- Test methods: tests consist of attacks with screwdrivers, hammers, pliers and in later phases also with more powerful tools.
- Combination requirements: The total door construction (door leaf, frame, hardware and hinges) determines the final resistance class.
- Lower resistance: locks and hardware without SKG certification are often easy to force.
- No PKVW certification: homes or buildings cannot meet Politiekeurmerk requirements.
- Insurance problems: compensation may be lower in the event of burglary via non-certified hardware.
- False security: a solid door with poor hardware remains vulnerable.
- PKVW guidelines: SKG** or SKG*** hardware is required for the Politiekeurmerk Veilig Wonen (Police Hallmark Secure Housing).
- European standards: SKG test methods are aligned with EN 1627–1630 (resistance classes RC1–RC6).
- Insurance conditions: many insurers require at least SKG** for exterior doors.
- Building Decree Netherlands: does not itself impose an SKG obligation, but refers to recognized quality marks and standards.
- House: front door equipped with SKG*** cylinder lock and security fittings, total costs approx. € 350.
- Apartment: common entrance with SKG** multi-point lock, price per door approx. € 1,000.
- Office: exterior doors executed in SKG*** with electronic access control, costs approx. € 1,800 per door.
- Only replacing cylinders with SKG***, but leaving old fittings or hinges in place.
- Thinking that SKG* is sufficient for exterior doors (while insurers usually require at least SKG**).
- No attention to the total door construction: even SKG*** locks are useless with a weak frame.
- Purchasing cheap imitations without an official quality mark.
Technical Aspects
Risks of lacking SKG
Laws and regulations
Cost estimate
|
Product type |
SKG* price indication |
SKG** price indication |
SKG*** price indication |
|
Cylinder lock |
€ 25 – € 40 |
€ 40 – € 70 |
€ 70 – € 120 |
|
Security fittings |
€ 40 – € 60 |
€ 60 – € 100 |
€ 100 – € 150 |
|
Multi-point lock |
n/a |
€ 150 – € 250 |
€ 250 – € 400 |
|
Complete exterior door (incl. SKG) |
€ 500 – € 700 |
€ 800 – € 1.200 |
€ 1.200 – € 2.000+ |
Practical examples
Common Mistakes
Conclusion
The SKG quality mark is an essential quality label for hardware and strongly determines the safety of a door. For exterior doors, at least SKG** is recommended, and for optimal security SKG***. The costs are higher than with standard hardware, but offer significant advantages in terms of burglary prevention, insurance coverage and peace of mind. When comparing quotes via jeofferte.nl, it is wise to always ask which SKG class is being applied and how this fits within the total door construction.
Types of security locks
A secure lock is one of the most important components of burglary prevention. It largely determines how well a door can withstand forced entry, cylinder pulling, or manipulation. Security locks come in various designs, each with its own technical properties, applications, and security levels. Choosing the right type of lock is essential for both homes and commercial buildings.
Features
- Security level: ranging from basic protection to heavy burglary resistance.
- Quality marks: many security locks are equipped with the SKG quality mark and comply with PKVW guidelines.
- Variation in use: there are locks for interior doors, exterior doors, windows and special entrances.
- Compatibility: lock and fittings must fit well with the door and frame for maximum effectiveness.
- Houses: front doors, back doors and balcony doors.
- Apartment complexes: access doors and communal entrances.
- Commercial properties: heavier locks, often combined with access control.
- Project construction: schools, care institutions and offices, where security and ease of use must be combined.
- Cylinder locks
- Most commonly used type for exterior doors.
- Works with a separate cylinder that can be replaced.
- Available in SKG* to SKG*** versions.
- Vulnerable without protection: core pulling and lock picking are well-known attack methods → anti-core pulling hardware is strongly recommended.
- Multi-point locks
- Locks at multiple points simultaneously (usually 3 or 5).
- Often operated with a single turn of the key.
- Highly recommended for exterior doors due to increased burglary resistance.
- SKG** or SKG*** certified.
- Surface mounted locks
- Are mounted on the inside of the door.
- Less common in new construction, still found in older homes.
- Always combine safety version with cylinder and SKG mark.
- Mortise locks
- Milled into the door, making them barely visible.
- Often used in combination with cylinders.
- Also available in fire-resistant and project versions.
- Electronic locks
- Operation via card, tag, smartphone or biometrics.
- Often used in utility buildings and luxury homes.
- Can be mechanically certified (e.g. SKG***) and offer extra security via access control.
- Anti-panic locks (emergency exits)
- Used in public buildings and escape routes.
- Comply with EN 179 or EN 1125 (panic hardware).
- Offer security against burglary and guarantee free passage in case of emergency.
- Substandard security: Standard cylinders without SKG are easy to break open.
- Incorrect installation: Poorly installed lock does not function properly, even with SKG***.
- No combination with good fittings: Without anti-core pulling fittings, a cylinder lock is vulnerable.
- Outdated techniques: Old surface-mounted locks or mortise locks without a quality mark offer little resistance.
- PKVW (Politiekeurmerk Veilig Wonen - Police Mark Safe Housing): Requires at least SKG** locks on exterior doors.
- SKG quality mark: Determines the burglary resistance of locks, from 1 to 3 stars.
- European standards: EN 12209 (mechanical locks), EN 14846 (electronic locks).
- Building Decree: sets requirements for escape routes (anti-panic locks) and fire resistance of certain lock constructions.
- House: front door equipped with SKG*** cylinder lock and anti-core pulling hardware, costs € 250.
- Apartment complex: central access doors with multi-point locks SKG**, approx. € 550 per door.
- Office: electronic cylinders with smartphone operation, price € 900 per door.
- Hospital: panic locks according to EN 1125 on escape doors, approx. € 700 per door.
- Only replace the cylinder, but leave old and weak door hardware in place.
- Install cheap locks without SKG certification.
- Think that a multi-point lock is infallible, while the quality of installation remains decisive.
- Choose electronic locks without a backup for power outages or hacking risks.
Applications
Technical aspects – types of locks
Risks of incorrect lock choice
Laws and regulations
Cost Estimate
|
Type of security lock |
Price lock (material) |
Installation costs |
Total per door |
|
Standard cylinder lock SKG** |
€ 40 – € 70 |
€ 80 – € 120 |
€ 120 – € 190 |
|
Cylinder lock SKG*** + anti-core pulling hardware |
€ 100 – € 180 |
€ 100 – € 150 |
€ 200 – € 330 |
|
Multi-point lock SKG**/*** |
€ 250 – € 400 |
€ 150 – € 250 |
€ 400 – € 650 |
|
Electronic lock (basic) |
€ 300 – € 600 |
€ 150 – € 250 |
€ 450 – € 850 |
|
Electronic lock (high-end biometric) |
€ 800 – € 1.500 |
€ 200 – € 400 |
€ 1.000 – € 1.900 |
Practical examples
Common mistakes
Conclusion
There are various types of security locks, from simple cylinders to high-end electronic systems. For homes, a minimum of an SKG-certified cylinder lock with anti-core pulling hardware is required, while commercial properties and high-risk objects often opt for multi-point locks or electronic locks. The costs range from €120 for a basic SKG lock to almost €2,000 for advanced electronic locks. When comparing quotes via jeofferte.nl, it is essential not only to look at the price, but also at quality marks, combinations with hardware, and installation quality.
Door hardware and hinges in relation to security
When it comes to burglary prevention, people often think of locks and cylinders, but door hardware and hinges are just as important. These components ensure that a door closes securely, cannot be easily pried open, and can withstand heavy use. The right hardware and hinges not only increase security, but also the durability and functionality of the door.
Features
- Door hardware: includes door handles, security rosettes, cylinder protection and anti-core pulling hardware.
- Hinges: provide stability and support the weight of the door. Security hinges prevent the door from being easily removed from the rebate.
- Quality marks: many hardware and hinges bear the SKG quality mark, which guarantees burglary resistance.
- Combination: locks, hardware and hinges must always be coordinated for optimal operation.
- Houses: front doors, back doors and interior doors with increased security requirements.
- Apartment complexes: access doors that require extra heavy fittings and security hinges.
- Commercial buildings: often equipped with heavy hinges and special anti-burglary fittings.
- Public buildings: fittings and hinges must be both safe and able to withstand intensive use.
- Anti-core pulling fittings: prevents the cylinder from being pulled out of the lock, one of the most common burglary methods.
- Security rosettes: protect the cylinder against manipulation and drilling.
- Security fittings with SKG*: available in 1, 2 or 3 stars; the more stars, the longer the burglary attempt is delayed.
- Door handles and grips: burglar-resistant fittings prevent them from being easily removed.
- Security hinges with burglar claws: ensure that the door cannot be lifted out when the hinge is removed.
- Heavy-duty hinges: suitable for heavy exterior doors and metal doors.
- SKG-certified hinges: tested for durability and burglar resistance.
- Invisible hinges: primarily aesthetic, but also difficult to manipulate in a security version.
- Breakable hardware: without anti-core pulling hardware, even an SKG*** cylinder is vulnerable.
- Prying open the door: standard hinges make it possible to easily lift a door out of the frame.
- Insufficient durability: cheap hardware can wear out, causing the lock to function less well.
- No coherence: strong lock, but weak hardware or hinges leads to an unbalanced security.
- SKG mark: both hardware and hinges can be SKG** or SKG*** certified.
- PKVW (Politiekeurmerk Veilig Wonen): requires approved hardware and at least two security hinges per door.
- European standard EN 1935: test methods and classification for hinges.
- Building Decree: prescribes safety and sustainability, with additional requirements for escape doors and fire-resistant doors.
- Single-family home: front door equipped with SKG*** safety hardware with anti-core pulling function and 3 safety hinges, total cost approx. € 450.
- Apartment complex: common entrance doors with reinforced hinges and SKG** hardware, price approx. € 280 per door.
- Office building: exterior doors equipped with steel safety hinges and SKG*** hardware, cost approx. € 550 per door.
- Only replace the lock, but leave the weak hardware in place.
- Use cheap hinges that wear out quickly or do not contain a burglar claw.
- Let the door hang on two hinges instead of three, making the door more vulnerable.
- Do not match the hardware and cylinder, leaving core pulling possible.
Applications
Technical Aspects
Door fittings
Hinges
Risks of unsafe hardware and hinges
Laws and regulations
Cost estimate
|
Product type |
Material costs |
Installation costs |
Total per door |
|
Standard door hardware (without SKG) |
€ 30 – € 60 |
€ 60 – € 100 |
€ 90 – € 160 |
|
Security fittings SKG** |
€ 80 – € 130 |
€ 80 – € 120 |
€ 160 – € 250 |
|
Security fittings SKG*** + core pulling protection |
€ 120 – € 180 |
€ 100 – € 150 |
€ 220 – € 330 |
|
Standard hinges |
€ 15 – € 30 (per piece) |
€ 30 – € 50 |
€ 75 – € 120 (3 pieces incl.) |
|
Security hinges with burglar claw |
€ 30 – € 50 (per piece) |
€ 40 – € 60 |
€ 150 – € 220 (3 pieces incl.) |
Practical examples
Common mistakes
Conclusion
Door fittings and hinges are essential components of a secure door construction. Without proper fittings and security hinges, even the best lock remains vulnerable. For exterior doors it is advisable to choose at least SKG-certified fittings with anti-core pulling protection and security hinges with burglar claws. The costs vary from € 160 for basic security fittings to € 450 or more for a complete security set per door. When comparing quotes via jeofferte.nl, it is important to pay attention to the combination of lock, fittings and hinges, because only a coherent whole offers optimal protection.
Securing glass in doors
Glass in doors provides light and aesthetic value, but also poses a security risk. A burglar can break glass to get to the lock or force the door. Therefore, it is essential to choose special security measures for doors with glass. These range from reinforced glass to constructive solutions that prevent the glass from easily providing access to the locking mechanisms.
Features
- Transparent and safe: maintains light without compromising burglary resistance.
- Various types of glass: laminated glass, tempered glass, wired glass and safety glass with certification.
- Combination with door construction: glass only works optimally in combination with solid frame, fittings and locks.
- Applicable to both interior and exterior doors.
- Front doors and back doors: often used with narrow glass strips or side panels.
- Interior doors: for soundproof or fire-resistant applications, often in offices or care institutions.
- Sliding doors and patio doors: large glass surfaces that require extra protection against burglary.
- Utility: entrance doors of shops, schools and public buildings.
- Laminated safety glass (PVB film between glass layers):
- In case of breakage, shards stick to the film → prevents rapid passage.
- Complies with NEN 3569 (safety glazing).
- Tempered glass:
- Up to 5x stronger than standard glass.
- Breaks into small, blurry pieces, less risk of cutting but no real burglary protection.
- Often combined with laminated variants.
- Wired glass:
- Equipped with metal grid in the glass.
- More fire-resistant than burglar-resistant.
- Burglar-resistant glass (EN 356 classifications):
- P1A–P5A: resistance to blows with objects.
- P6B–P8B: resistance to heavy attacks (e.g. at jewelers).
- Avoid narrow glass strips near locks → burglars can reach the key or handle faster.
- Place cylinders and locks at a distance from glass.
- Interior shielding with bars, polycarbonate or steel grates for high-risk applications.
- Adhesive technique (glazing with sealant): glass is fixed in the frame, making it harder to remove.
- Easy access: a small impact is often enough to reach the lock.
- Insurance problems: in case of burglary through unsecured glass, damage may not be fully compensated.
- Risk of injury: broken single glass produces dangerous shards.
- False security: a door with an SKG*** lock has little value if the glass is weak.
- NEN 3569: requires safety glass for doors lower than 85 cm above the floor.
- PKVW (Politiekeurmerk Veilig Wonen): requires laminated or burglar-resistant glass in doors and frames in high-risk areas.
- EN 356: European standard for burglar-resistant glass (resistance classes P1A – P8B).
- Bouwbesluit Nederland: sets requirements for injury safety and, in certain cases, for fire resistance of glass.
- Single-family home: front door with narrow glass strip replaced by laminated safety glass, total costs approx. € 280.
- Apartment complex: central entrance fitted with P4A burglar-resistant glass, price approx. € 350 per door panel.
- Shop: access door with P6B glass and steel shielding, costs approx. € 650 per door.
- Office: interior door with fire-resistant wired glass, approx. € 300 per door.
- Using single-pane or standard double-pane glass in exterior doors.
- Placing locks too close to the glass.
- Only securing the door panel and forgetting the side panels or transoms.
- Thinking that tempered glass is automatically burglar-resistant.
Applications
Technical Aspects
Glass Options
Constructive measures
Risks of unsecured glass
Laws and regulations
Cost estimate
|
Type of glass / security |
Material costs per m² |
Installation costs |
Total per door |
|
Standard double glazing (not burglar-resistant) |
€ 60 – € 80 |
€ 100 – € 150 |
€ 160 – € 230 |
|
Laminated safety glass (PVB film) |
€ 100 – € 150 |
€ 120 – € 180 |
€ 220 – € 330 |
|
Burglar-resistant glass (class P4A – P5A) |
€ 150 – € 220 |
€ 150 – € 200 |
€ 300 – € 420 |
|
High-class burglar-resistant glass (P6B – P8B) |
€ 250 – € 400 |
€ 200 – € 300 |
€ 450 – € 700 |
Practical examples
Common Mistakes
Conclusion
The use of glass in doors requires extra attention to safety and burglary prevention. Especially exterior doors with glass are vulnerable without the right measures. Laminated safety glass or glass with a classification according to EN 356 (P4A or higher) offers an effective solution. The costs range from € 220 for basic safety glass to € 700 or more for high-class burglar-resistant glass. When comparing quotes via jeofferte.nl, it is important to pay attention to both the glass choice and the placement and construction of the door frame.
High burglary resistance materials for doors
In addition to locks, fittings and glass selection, the material of the door itself also plays an important role in burglary resistance. A strong door construction determines how difficult it is to gain access with brute force, tools or breaking methods. The choice of material type – wood, steel, aluminum or composite – has a direct impact on both safety and sustainability.
Features
- Strength and durability: materials with high density and strength offer more resistance.
- Combination with locking system: material must be suitable for mounting SKG*** locks and fittings.
- Fire and sound properties: often combined with extra functions such as fire resistance or insulation.
- Maintenance level: some materials (e.g. steel) require more protection against rust, while composite is low-maintenance.
- Houses: front doors, back doors and garage doors, often in wood or composite.
- Apartment complexes: fire-resistant and burglar-resistant doors in steel or heavy wood.
- Commercial properties: access doors made of metal, often combined with electronic security.
- Specific objects: archive rooms, laboratories and shops where higher resistance classes are required.
- Solid hardwood (e.g. merbau, meranti or oak).
- High density → difficult to saw or force.
- Suitable for SKG*** locks and multi-point locks.
- Maintenance required against moisture and warping.
- Extremely strong material, difficult to break or split.
- Often used in commercial buildings and with RC3 or higher classified doors.
- Corrosion protection required (powder coating or galvanizing).
- Heavier → reinforced hinges needed.
- Lighter than steel but very strong with reinforcement profiles.
- Often combined with glass (for example in entrance facades).
- Low maintenance and weather resistant.
- Burglar resistance depends on construction and glass choice.
- Composed of multiple layers (wood fiber, plastic, metal).
- Low maintenance, strong and well insulating.
- Widely used in modern front doors.
- Suitable for SKG*** fittings and locks.
- Plywood with metal plates or reinforcements.
- Fire-resistant and burglar-resistant combination constructions.
- Often used in commercial buildings and high-risk objects.
- Hollow interior doors: offer hardly any resistance, even with a good lock.
- Soft woods (spruce, pine): easy to split or drill out.
- Plastic without reinforcement: can bend or tear under force.
- Old or rotten material: makes door extra vulnerable.
- SKG certification: door constructions are often tested in combination with fittings and locks.
- EN 1627 – 1630: European classification of resistance classes (RC1 to RC6).
- PKVW (Politiekeurmerk Veilig Wonen): prescribes at least SKG**, but recommends SKG*** for high-risk doors.
- Building Decree: sets requirements for fire resistance and escape safety, in some cases combined with burglary resistance.
- Single-family home: front door replaced with composite door with SKG*** locks, total cost approx. € 1,700.
- Apartment complex: central access doors in steel with RC3 certification, approx. € 2,800 per door.
- Shop: aluminum facade with P4A glass and SKG*** hardware, approx. € 2,200 per door.
- Archive room: special RC5 doors with steel core, cost approx. € 4,500.
- Installing a good lock in a weak door → security remains minimal.
- Forgetting that hinges must be adjusted to the heavier material.
- Choosing aesthetics over safety (large glass surfaces without reinforcement).
- Replacing the door, but keeping the old frame that is easy to force open.
Applications
Technical aspects per material
1. Hardwood
2. Steel
3. Aluminum
4. Composite / plastic reinforced
5. Special burglary-resistant core materials
Risks with weak materials
Laws and regulations
Cost estimate
|
Material / execution |
Guide price door leaf |
Installation costs |
Total per door |
|
Hardwood security door (SKG**) |
€ 700 – € 1.200 |
€ 250 – € 400 |
€ 950 – € 1.600 |
|
Composite front door (with SKG***) |
€ 1.000 – € 1.500 |
€ 300 – € 450 |
€ 1.300 – € 1.950 |
|
Steel security door RC3–RC4 |
€ 1.500 – € 2.500 |
€ 400 – € 600 |
€ 1,900 – € 3,100 |
|
Aluminum door with burglar-resistant glass |
€ 1,200 – € 1,800 |
€ 300 – € 500 |
€ 1,500 – € 2,300 |
|
Special security door RC5–RC6 |
€ 3,000 – € 5,000+ |
€ 500 – € 800 |
€ 3,500 – € 5,800+ |
Practical examples
Common mistakes
Conclusion
The material choice of a door largely determines the burglary resistance. Hardwood, composite, steel, and aluminum offer a solid base and can meet high resistance classes, provided they are combined with SKG-certified hardware, locks, and installation. The costs range from approximately €1,000 for a hardwood door to more than €5,000 for special RC5/RC6 security doors. When comparing quotes via jeofferte.nl, it is wise to pay attention to the interplay of material, locks, hardware, hinges, and installation, as only a complete solution offers maximum security.
Fire-resistant and burglar-resistant doors
In many buildings, there is a need not only for protection against burglary, but also for fire safety. Fire-resistant and burglar-resistant doors combine these two functions and are used in both residential and commercial buildings. These doors are specially designed to withstand both physical attacks from burglars and the spread of fire and smoke.
Features
- Dual function: delays burglary attempts and prevents fire spread and smoke propagation.
- Test certificates: provided with classifications according to NEN-EN 1634-1 (fire resistance) and EN 1627–1630 (burglar resistance).
- Various materials: steel, composite or solid wood with fire-retardant core.
- Matched hardware and locks: only effective in combination with SKG-certified hardware.
- Versatile: homes, apartments, commercial buildings, care facilities and government buildings.
Applications
- Homes: especially in apartments, storage rooms and escape routes.
- Apartment complexes: access doors to common areas often need to be both fire- and burglar-resistant.
- Offices and schools: between compartments to limit the spread of fire and ensure safety.
- Industry and storage: protection of valuable goods and limitation of fire damage.
- Tested according to NEN-EN 1634-1.
- Classes: 30, 60, 90 and 120 minutes fire resistant.
- Hardware and glazing must be fire resistant (intumescent strips, smoke-resistant devices).
- Tested according to EN 1627 – 1630.
- Resistance classes (Resistance Class / RC):
- RC2: standard for homes.
- RC3: increased security for apartments and commercial buildings.
- RC4 – RC6: high security for high-risk objects (banks, archives).
- Only effective when using SKG*** locks, fittings and security hinges.
- Steel: very strong, suitable for RC3 and higher, often with powder coating against rust.
- Composite: low-maintenance and insulating, with fire-resistant core.
- Solid hardwood: with fire-resistant additives and reinforcements.
- Incorrect certification: doors without official testing are not reliable.
- No matched hardware: fire-resistant door with standard locks loses classification.
- Forgotten frame: frame and seals must also be fire and burglar resistant.
- Defective assembly: even the best door loses its effect with poor installation.
- Building Decree Netherlands: requires fire-resistant doors for separations between fire compartments.
- NEN-EN 1634-1: test standard for fire resistance of doors.
- EN 1627 – 1630: test standards for burglar resistance (RC classes).
- PKVW: prescribes SKG** or SKG*** hardware for exterior doors.
- Insurers: may impose increased requirements for high-risk properties.
- Apartment: replacing the front door with a fire-resistant RC2 door (60 minutes), total approx. € 1,400.
- Office: compartment door RC3 with 90 min fire resistance, price approx. € 2,200 per door.
- Archive: steel RC4 doors with 120 min fire resistance, costs approx. € 5,000 per door.
- Shop: composite RC3 access door with SKG*** lock, price approx. € 1,900.
- Installing a fire-resistant door with a standard cylinder → door no longer meets the standard.
- Replacing only the door leaf, but forgetting to certify the frame and strips as well.
- Thinking that all fire-resistant doors are automatically burglar-resistant (this is not the case).
- Purchasing cheap imitations without official test certificates.
Technical Aspects
Fire resistance
Burglar resistance
Materials
Risks of wrong choice
Laws and regulations
Cost Estimate
|
Door Design |
Fire Resistance |
Burglar Resistance |
Target Price Door Leaf |
Installation Costs |
Total per Door |
|
Wooden fire-resistant door RC2 |
30–60 min |
Basic (RC2) |
€ 800 – € 1.200 |
€ 300 – € 400 |
€ 1.100 – € 1.600 |
|
Composite fire & burglar resistant RC3 |
60 min |
RC3 |
€ 1,200 – € 1,800 |
€ 400 – € 600 |
€ 1,600 – € 2,400 |
|
Steel door RC3 with fire-resistant core |
60–90 min |
RC3 |
€ 1,500 – € 2,500 |
€ 500 – € 700 |
€ 2,000 – € 3,200 |
|
High-security door RC4–RC5 (bank/archive) |
90–120 min |
RC4–RC5 |
€ 3,000 – € 5,000 |
€ 600 – € 800 |
€ 3,600 – € 5,800 |
Practical examples
Common Mistakes
Conclusion
Fire-resistant and burglar-resistant doors offer double protection: they delay both the spread of fire and a burglary attempt. For homes, an RC2–RC3 door with 30–60 minutes of fire resistance is usually sufficient, while commercial buildings and archives often opt for RC4–RC5 doors with 90–120 minutes of fire resistance. The costs vary from approximately €1,100 per door to over €5,000 for high-security versions. When comparing quotes via jeofferte.nl, it is important to pay attention to the combination of certification, hardware, frame and installation, because only a fully certified system offers real security.
Extra security options
In addition to a solid door construction, SKG-certified hardware and a good lock, there are various extra security options that make doors even more resistant to burglary attempts. These provisions increase the resistance class of a door, provide more comfort in daily use and are increasingly used in homes, apartment complexes and commercial buildings.
Features
- Additional protection: extra obstacles that cost burglars more time.
- Technical variation: both mechanical and electronic security.
- Flexibly applicable: suitable for existing and new doors.
- Synergy: works best in combination with SKG*** locks and solid hardware.
- Houses: front doors, back doors, balcony doors and storage doors.
- Apartment complexes: common entrance doors and basement areas.
- Utilities and shops: entrance doors and back doors where higher security is needed.
- Higher risk properties: storage rooms, archives, care institutions and laboratories.
- Protects the cylinder against core pulling, the most commonly used burglary method.
- Is mandatory advised by the Politiekeurmerk Veilig Wonen (PKVW).
- Always use on exterior doors with cylinder locks.
- Prevents a door from being lifted out when the hinge pins are removed.
- Necessary for outward opening doors.
- Aluminum or steel profiles that seal the gap between door and frame.
- Make it virtually impossible to pry the door open with a crowbar.
- SKG-certified available.
- One key operation for multiple locking points (top, middle, bottom).
- Significantly increases burglary resistance.
- Can be combined with cylinder or electronic locks.
- Smartlocks: operation via smartphone, remote control or tag.
- Access control: registration of who opens the door.
- Alarm switching: door linked to alarm system in case of forced entry.
- Visually check who is at the door before opening it.
- Video intercoms with recording function are popular in apartments.
- Extra metal reinforcements in door and frame.
- To be applied to wooden doors to prevent splitting.
- Especially used in shops and commercial buildings.
- Combination of physical and visual security.
- Even an SKG*** lock can be forced without anti-core pulling hardware.
- A good lock doesn't help if the door is easy to pry open.
- Security options lose effectiveness with poor installation.
- Too much electronic security without a mechanical basis creates a false sense of security.
- PKVW (Politiekeurmerk Veilig Wonen - Police Mark Safe Housing): requires anti-core pulling hardware, at least two security hinges and a multi-point lock on front doors.
- SKG certification: also applies to additional security products (e.g. secustrips, hardware).
- Building Decree: sets requirements for escape routes → extra locks or bolts must not block these.
- AVG/GDPR: camera security and video intercoms must take privacy legislation into account.
- Single-family home: front door with SKG*** cylinder, anti-core pulling hardware and secustrip → approx. € 350.
- Apartment: entrance door with multi-point lock and security hinges → approx. € 600.
- Office: electronic access control with smartlocks → € 900 per door.
- Store: combination of roller shutters and RC3 door → € 2,500.
- Replacing only the lock without additional hardware.
- Secustrips incorrectly installed, negating their effectiveness.
- Installing a Smartlock without a mechanical backup in case of power failure.
- Using cheap imitation hardware without SKG certification.
Applications
Technical aspects – types of extra security options
1. Anti-core pulling hardware
2. Safety hinges with burglar claws
3. Secustrips (anti-burglary strips)
4. Multipoint locks
5. Electronic security options
6. Peepholes and intercom systems
7. Reinforcement profiles and door anchors
8. Shutters or gates (additional)
Risks of skipping extra options
Laws and regulations
Cost Estimation
|
Security Option |
Material Costs |
Installation Costs |
Total per door |
|
Anti-core pulling hardware (SKG***) |
€ 50 – € 90 |
€ 80 – € 120 |
€ 130 – € 210 |
|
Security hinges (3 pieces) |
€ 90 – € 150 |
€ 60 – € 100 |
€ 150 – € 250 |
|
Secustrip / anti-burglary strip |
€ 60 – € 100 |
€ 70 – € 120 |
€ 130 – € 220 |
|
Multi-point lock SKG*** |
€ 250 – € 400 |
€ 150 – € 250 |
€ 400 – € 650 |
|
Smartlock (electronic lock) |
€ 300 – € 800 |
€ 150 – € 250 |
€ 450 – € 1.050 |
|
Video doorbell / intercom |
€ 150 – € 400 |
€ 100 – € 200 |
€ 250 – € 600 |
Practical examples
Common Mistakes
Conclusion
Extra security options significantly increase the resistance of a door and make it much more difficult for burglars. For homes, anti-core pulling hardware, security hinges and secustrips are often the most effective basic measures. For companies and complexes, multi-point locks and electronic systems are often added. Costs range from approx. € 150 for basic security to more than € 1,000 for advanced smartlocks or access control. When comparing quotes via jeofferte.nl, it is important to pay attention to both quality marks and installation quality, because only a complete system offers reliable protection.
Maintenance and inspection of locks and hardware
Even the best locks and the most solid hardware lose their effectiveness if they are not properly maintained. Regular maintenance and inspection of hardware is crucial to extend the lifespan, prevent malfunctions and ensure burglary resistance. This applies to both private homes and commercial buildings and complexes where doors are used intensively.
Features
- Extends lifespan: good maintenance can extend the lifespan of locks and hardware by years.
- Fault prevention: prevents stuck cylinders or poorly closing doors.
- Safety: worn parts form a weak spot in security.
- Cost saving: timely replacement of wear parts prevents more expensive repairs.
- Front and back doors: intensively used and therefore extra maintenance-sensitive.
- Apartment complexes: central access doors with high usage frequency.
- Commercial buildings and shops: exterior doors and warehouse doors with heavy locks.
- Interior spaces with a high security class: archives, care institutions or laboratories.
- Lubricating cylinder locks
- Use graphite powder or special lock spray (no oil, this attracts dirt).
- Apply 1 to 2 times per year.
- Cleaning fittings and hinges
- Clean regularly with a soft cloth and mild cleaner.
- Do not use aggressive cleaning agents (damages the protective layer).
- Tightening of fixing screws
- Check fittings and hinges to prevent loosening.
- Especially important for exterior doors that are heavily used.
- Check closing joint and alignment
- Door must close smoothly without jerking or pulling.
- Adjust hinges or strike plates if necessary.
- Visual inspection
- Look for wear, rust, cracks or bending.
- Also check whether the cylinder still protrudes correctly (max. 3 mm).
- Private residence: 1x per year maintenance check.
- Apartment complex / commercial building: 2x per year inspection and maintenance due to more intensive use.
- High-security applications: periodic inspection according to regulations (e.g. NEN 5089 for access control).
- Stuck locks: key breaks off or door does not open.
- Loss of burglar resistance: loose hinges or bent fittings make forcing easier.
- Higher costs: neglected parts often have to be completely replaced.
- Insurance problems: damage cannot always be recovered with poor maintenance.
- PKVW (Politiekeurmerk Veilig Wonen): recommends periodic maintenance of hardware and locks.
- SKG-keurmerk: guarantees quality, but not without proper maintenance.
- Bouwbesluit: sets requirements for escape routes → poor maintenance can lead to danger in emergency situations.
- NEN 5089: standard for inspection and maintenance of access control systems (especially in utility).
- Single-family home: annual maintenance (lubricating cylinders, checking fittings) for approx. € 80.
- Apartment complex: semi-annual inspection of 20 doors including minor repairs, total approx. € 500 per round.
- Office: replacement of 5 outdated cylinders with SKG*** variants, costs approx. € 600.
- Care institution: contract maintenance for 30 doors with access control, approx. € 1,200 per year.
- Use of WD-40 or oil in cylinders → attracts dirt and shortens lifespan.
- Waiting too long to replace worn cylinders.
- Only checking the lock, but skipping fittings and hinges.
- No periodic checks on heavily used doors.
Applications
Technical Aspects
Maintenance work
Inspection intervals
Risks of neglected maintenance
Laws and regulations
Cost estimate
|
Maintenance task |
Frequency |
Costs (indicative) |
|
Inspection + lubrication of cylinders |
Annually |
€ 50 – € 100 per home |
|
Cleaning and adjusting hardware |
Annually |
€ 30 – € 60 per door |
|
Replacing worn cylinder |
On average after 7–10 years |
€ 60 – € 150 per cylinder |
|
Replacing hardware or hinges |
Depending on wear |
€ 80 – € 200 per door |
|
Maintenance contract (complexes) |
2x per year |
€ 300 – € 600 per year (10–15 doors) |
Practical examples
Common mistakes
Conclusion
Proper maintenance and timely inspection of locks and fittings are crucial for both safety and durability. With simple actions such as lubricating, cleaning, adjusting, and visual inspection, the lifespan of hardware can be significantly extended. The annual costs are relatively low (approx. € 50 – € 100 per door), especially compared to the risks of burglary or defects. When comparing quotes via jeofferte.nl, it pays to pay attention to maintenance contracts and periodic inspections, especially for larger buildings and complexes.
Costs of burglary prevention measures
Burglary prevention is a combination of sturdy materials, the right locks and additional security options. The total costs of burglary prevention measures depend on the type of home or property, the chosen products, and the level of security desired. Different solutions are often appropriate for a single-family home than for a store or an archive room with high requirements.
Features
- Wide cost range: from a few hundred euros for basic measures to thousands of euros for extensive security systems.
- Highly dependent on risk: more risk → higher requirements → higher investment.
- Quality marks and standards: SKG***, PKVW and RC resistance classes influence the price.
- Combination of measures: materials, locks and assembly together determine the actual security.
- Private residences: basic security (cylinder locks, anti-core pulling fittings, security strips).
- Apartment complexes: central access doors, storage rooms and common areas.
- Commercial buildings and shops: extra security against burglary attempts with coarse tools.
- High-risk locations: archives, jewelers, laboratories with RC4–RC6 doors and electronics.
- SKG cylinder locks: € 60 – € 150 per piece.
- Anti-core pulling fittings: € 130 – € 210 per door (incl. installation).
- Safety hinges with burglar claws: € 150 – € 250 per door.
- Secustrips (anti-burglary strip): € 130 – € 220 per door.
- Multipoint lock SKG*: € 400 – € 650 per door.
- Reinforcement profiles or door anchors: € 100 – € 200 per door.
- Laminated safety glass: € 220 – € 330 per door panel.
- Burglar-resistant glass (P4A – P5A): € 300 – € 420 per panel.
- Smartlock / electronic lock: € 450 – € 1.050 per door.
- Video doorbell or intercom: € 250 – € 600.
- Link with alarm system: from € 500 (excl. subscription costs).
- Composite front door with SKG* fittings:** € 1,300 – € 1,950.
- Steel RC3–RC4 doors: € 1,900 – € 3,100.
- Special RC5–RC6 security doors: € 3,500 – € 5,800+.
- False security: cheap fittings without a quality mark can be easily forced.
- Unequal security level: strong lock in a weak door leaf or frame makes little sense.
- Insurance problems: in the event of burglary without a minimum SKG**, compensation may be limited.
- PKVW (Politiekeurmerk Veilig Wonen): recommends at least SKG** hardware and locks, anti-core pulling fittings and multi-point locks for front doors.
- SKG-keurmerk: determining for the classification of locks, cylinders and hardware.
- EN 1627 – 1630: European test standard for resistance classes (RC1 to RC6).
- Bouwbesluit: sets indirect requirements for safety via escape routes and fire compartmentation.
- Apartment: front door with SKG*** cylinder, anti-core pulling hardware and secustrip → approx. € 800.
- Detached house: replacement of front door with RC2 composite door with multi-point lock → approx. € 1,900.
- Commercial property: steel RC3 doors with burglar-resistant glass and electronic access control → approx. € 3,800 per door.
- Jeweler: RC5 security door + alarm system → approx. € 6,000 per door.
- Only securing the front door, while the back door or storage room remains weak.
- Forgetting about windows and skylights in the overall security.
- Saving on assembly quality (incorrectly installed locks lose their effect).
- Keeping the old frame when replacing the door → the weakest link remains exist.
Applications
Technical aspects – costs per measure
1. Basic locks and fittings
2. Door reinforcement
3. Safety glass
4. Electronic security
5. High-security doors
Risks of underinvestment
Laws and regulations
Cost estimate – total per house type
|
Type of measure |
Small house / apartment |
Detached house |
Commercial building |
|
Basic security (SKG** locks + hardware) |
€ 500 – € 900 |
€ 700 – € 1,200 |
€ 1,000 – € 1,500 |
|
Extensive security (incl. security strips and multi-point lock) |
€ 1,200 – € 1,800 |
€ 1,500 – € 2,500 |
€ 2,000 – € 3,500 |
|
Advanced security (electronics + security doors) |
€ 2,000 – € 3,500 |
€ 2,500 – € 5,000 |
€ 4,000 – € 8,000 |
Practical examples
Common mistakes
Conclusion
The costs of burglary prevention measures vary widely: from €500 for basic security to over €5,000 for high-security applications. For most homes, an investment between €1,200 and €2,500 is sufficient to meet the Police Security Label Secure Living. For commercial properties or high-risk locations, more stringent measures are often necessary. Comparing quotes via jeofferte.nl helps in finding the right balance between security, price and level of application, where not only the lock, but also the door construction and installation are decisive.