Frames

Definition

Plastic windows are window or door frames made of hard PVC (polyvinyl chloride), a durable and dimensionally stable plastic material specially developed for outdoor applications in construction. These frames are produced as closed, reinforced profile systems equipped with multiple air chambers, insulation values and seals.

Plastic windows are designed for long-term use without intensive maintenance and offer a modern, insulating and price-attractive solution for residential construction and renovation.

jeofferte.nl only works with window brands that comply with applicable European standards, such as CE marking, KOMO quality mark and VKG certification.

Function

Plastic windows fulfill several functional and constructional roles within a home or building. Below is an overview of the most important functions:

1. Load-bearing and connecting construction

• Supports the glass and the rebate construction
• Connects building openings to the exterior wall
• Supports rotating and moving parts such as windows and doors

2. Thermal insulation

• Reduces heat loss through windows and doors
• Limits cold drafts and increases energy efficiency
• Suitable for use with HR++ or triple glazing (U-value up to 0.8 W/m²K)

3. Sound insulation

• Keeps ambient noise out, especially in combination with soundproof glass
• Improves living comfort in urban or high-traffic areas

4. Burglar resistance and safety

• Suitable for integration of SKG** approved hardware
• Combinable with safety glass and core pulling protection
• Frequently used with Politiekeurmerk Veilig Wonen (PKVW)

5. Ventilation provision

• Supports natural ventilation via integrated grilles or tilt positions
• Reduces the risk of mold and moisture problems

6. Light incidence and aesthetics

• Provides natural daylight
• Available in various colors, structures and profile shapes (classic to modern)
• Can be tailored to facade architecture and building style

7. Ease of maintenance and sustainability

• No painting or special treatment required
• Resistant to moisture, UV radiation, frost and weathering
• Lifespan of 30 to 40 years with normal use and minimal maintenance

jeofferte.nl – expert advice on plastic windows

Whether it concerns renovation, new construction or extension: plastic windows offer a functional and economically attractive alternative to wood or aluminum.

Via jeofferte.nl you compare multiple specialized providers, including:

• Profile type and number of air chambers
• Installation depth, color, structure and finish
• Hardware, glass selection and safety
• Placement, finishing and warranty conditions

 

When replacing or installing window frames, the choice of material is one of the most important decisions. Each material has its own characteristics in terms of insulation, maintenance, lifespan, appearance and price. jeofferte.nl advises to tailor the choice to the function of the building, the desired level of comfort and the available budget.

Below are the four most commonly used materials in the Netherlands:

1. Plastic window frames

Material: Unsaturated hard PVC (U-PVC), often reinforced with steel or composite

Advantages:

• Low maintenance (no painting required)
• Good insulation value (HR++ or triple glazing)
• Various colors and wood grain structures possible
• Long lifespan (30 – 40 years)
• Relatively low purchase price

Aandachtspunten:

• Not paintable (color choice must be determined in advance)
• Foil color slightly more sensitive to pollution or UV in extreme conditions
• Less suitable for monuments (appearance less authentic)

Application:
New construction, renovation, apartments, terraced houses, commercial construction

Average price incl. glass and installation:
€ 750 – € 1,200 per window frame

jeofferte.nl works with suppliers who only use CE-approved, lead-free PVC profiles with KOMO- or VKG certification.

2. Wooden frames

Material: Hardwood (meranti, mahogany, afzelia) or sustainable softwood (thermally modified)

Advantages:

• Natural, warm appearance
• Easily customizable or paintable
• Suitable for listed buildings or classic architecture
• Good insulating properties with correct profiling

Points to consider:

• Regular maintenance required (painting every 5–7 years)
• Risk of wood rot or deformation with insufficient protection
• Higher costs for durable hardwood

Application:
Characteristic houses, villas, inner-city renovation, heritage buildings

Average price incl. glass and installation:
€ 900 – € 1,500 per frame

jeofferte.nl always advises choosing durability class I or II (e.g. FSC hardwood) and to inquire in advance about the warranty on treatment against rot and operation.

3. Aluminum Frames

Material: Powder-coated aluminum with thermal break

Advantages:

• Slim and sleek profile – ideal for large glass surfaces
• Extremely dimensionally stable, strong and low-maintenance
• Modern look
• Very long lifespan (40 – 60 years)
• Suitable for higher structures (light construction)

Points to consider:

• Higher purchase costs
• Less insulating than plastic or wood, unless with high-quality break
• Colder appearance (subjective)

Application:
Modern new construction, villas, office buildings, apartment complexes

Average price incl. glass and installation:
€ 1,200 – € 1,800 per frame

jeofferte.nl connects you with aluminum specialists who work with profiles from top brands such as Reynaers, Schüco or Aliplast, including color coating and insulation class.

4. Steel frames (galvanized or thermally broken)

Material: Powder-coated steel (usually in combination with stained glass or industrial glazing)

Advantages:

• Very slim and aesthetic – especially for industrial or historical applications
• High strength and burglary resistance
• Unique design, ideal for renovation of factory buildings or lofts

Aandachtspunten:

• More expensive to purchase and install
• Moderate insulation (unless specially thermally broken)
• Regular maintenance for galvanized steel

Application:
Lofts, monuments, industrial buildings, interior frames (e.g. steel pivot doors)

Average price incl. glass and installation:
€ 1,800 – € 3,000 per frame

jeofferte.nl advises steel frames only for niche projects or interior spaces, unless extra thermal break is applied.

Comparative overview – frame materials

Material	Insulation	Maintenance	Lifespan	Appearance	Price level*
Plastic	Good	Very low	30 – 40 years	Modern, sleek	€€
Wood	Good	High	25 – 35 yr	Natural, classic	€€€
Aluminum	Moderate – good	Low	40 – 60 yr	Sleek, industrial	€€€€
Steel	Moderate	Middle	50+ yrs	Slim, industrial	€€€€€

*indicative on a scale of € (low) to €€€€€ (very high)

jeofferte.nl – expert guidance in material selection

When requesting window quotes via jeofferte.nl:

• Get multiple material options clearly side by side
• Are the pros and cons transparently included in the quote
• Are finishes, colors, and glazing options directly included in the price
• Do you always have the option to compare wooden, plastic, and aluminum variants with each other – technically and financially

Are you unsure which material best suits your home, year of construction, and insulation requirements?
Request multiple quotes via jeofferte.nl with a clear material proposal and personal advice. This way, you make a well-considered choice without surprises afterwards.

 

Material component	Description	Average price per m² (incl. VAT)
Plastic window frame profile (white)	Basic profile with 5 chambers and standard fittings	€ 180 – € 250
Plastic frame (color/foil)	With wood grain structure or RAL color (foil exterior side)	€ 220 – € 290
HR++ glass (double glazing)	Insulating glass with argon filling, U-value ± 1.1 W/m²K	€ 90 – € 130
HR+++ Glass (Triple Glazing)	Triple glazing with extra insulation, U-value ± 0.6	€ 140 – € 200
Laminated Safety Glass (P2A – P4A)	Burglar-resistant, cut-resistant glass	€ 120 – € 220
Sound-insulating glass (e.g. 6/15/4)	Increased sound insulation, especially from traffic noise	€ 110 – € 180
Warm edge spacer	Thermally broken edge between glass panes	€ 10 – € 20 (additional charge)
Ventilation grille (self-regulating)	Placed on top of the glass, aluminum or plastic	€ 30 – € 60 per linear meter
Color film inside (optional)	Extra color finish on the inside	€ 30 – € 50 extra per m²

Indicative total costs for uPVC windows (material per m²)

Combination	Total price (material per m²)
Basic white uPVC + HR++ glass	€ 270 – € 370
Coloured uPVC frame + HR++ glass + vent	€ 330 – € 430
Plastic frame with HR+++ glass (triple glazing)	€ 360 – € 490
Safety version (laminated glass + fittings)	€ 400 – € 520

Note: These amounts are for the material, excluding installation costs. A full quote via jeofferte.nl also includes assembly, finishing, demolition work (if necessary), and guarantees.

jeofferte.nl – transparent about material prices

At jeofferte.nl you will receive:

• Fully specified prices per component (profile, glass, finish)
• Choice of standard and premium versions
• Optional upgrade with safety or comfort glass
• Indication of possible additional charges per option (e.g. color foil, ventilation grilles)

 

Plastic windows are made up of multiple layers and components that together ensure insulation, strength, colorfastness and low-maintenance use. When choosing windows, it is important to look beyond “plastic” as a type of material. jeofferte.nl advises to pay attention to the type of profile, the number of air chambers, the surface finish and the reinforcements used.

Below is an overview of the most important material characteristics.

1. Basic raw material – PVC (polyvinyl chloride)

• Composition: Unsaturated, hard PVC (U-PVC) with stabilizers
• Properties: Dimensionally stable, weather-resistant, impact-resistant and UV-resistant
• Additives: Calcium-zinc stabilizers (instead of lead-containing components, more environmentally friendly)

jeofferte.nl only selects window frame brands that use lead-free PVC with CE marking.

2. Profile Construction – Number of Air Chambers

• Plastic frames consist of a multi-chamber profile, usually with 3 to 7 air chambers.
• More air chambers = better thermal and acoustic insulation.
• 5- or 6-chamber profiles are standard with HR++ glass; 7-chamber profiles with triple glazing.

Number of Chambers	Application	Insulation Value (U-frame)
3 – 4 chambers	Basic renovation / budget projects	1.4 – 1.6 W/m²K
5 – 6 chambers	Standard housing construction	1.0 – 1.3 W/m²K
7 rooms	New construction / passive house	0.8 – 1.0 W/m²K

jeofferte.nl recommends at least a 5-chamber profile with HR++ glass, for a balance between price and performance.

3. Reinforcement – steel inlay or composite

• To prevent deformation and deflection, plastic profiles are reinforced with steel or glass fiber reinforced plastic (GRP).
• Steel inlay is common for larger window surfaces or tilt and turn systems.
• Some premium brands offer composite reinforcement (steel-free) for even better insulation and lower thermal conductivity.

Ask via jeofferte.nl explicitly about the type and the thickness of the reinforcement for large elements or doors.

4. Surface finish – color and structure

• White smooth plastic (RAL 9016) is standard – easy to maintain and colorfast.
• Foil finish (renolit foil) in wood grain structure or solid color is possible in more than 50 RAL colors.
• Foils are UV resistant and often dirt-repellent.

Finishing type	Appearance	Surcharge (indication)
Smooth white	Neutral and classic	–
Wood grain foil (white)	Structure with matte effect	+ € 30 – € 50 per m²
Color foil (anthracite, black, wood look)	Modern or rustic	+ € 40 – € 70 per m²

jeofferte.nl helps you to match the window frame color to the facade, roof edges or window decoration.

5. Glass rubbers and seals

• High-quality EPDM or TPE rubbers ensure a wind and watertight seal.
• Preferably black or gray rubber, seamlessly integrated into the profile.
• Depending on the type of profile: 2 or 3 sealing levels (driving rain, draft, soundproofing)

Triple sealing is highly recommended when using triple glazing.

6. Ventilation Grilles and Glass Filling

• Plastic frames can be fitted with integrated ventilation grilles, often adjustable per room.
• Standard with HR++ glass, optionally with triple, solar control, soundproof or laminated glass.

Popular options:

• DucoTon 10 or 12 ZR: self-regulating, sound-absorbing
• Renson Invisivent: sleek design, thermally broken

jeofferte.nl always advises to include ventilation capacity in the window advice, especially in airtight new construction.

7. Quality Marks and Certificates

When choosing materials, pay attention to the following standards and certifications:

• KOMO-keur: constructive quality, durability
• VKG Keurmerk: industry guarantee for assembly and production
• SKG: burglary resistance (class 1 to 3)
• CE marking: meets European product requirements
• Politiekeurmerk Veilig Wonen: complete security solution

All jeofferte.nl partners work exclusively with profiles and glass that meet these certification standards.

In summary – material characteristics of plastic frames

Component	Main properties
PVC profile	Lead-free, impact-resistant, colorfast, low-maintenance
Air chambers	3 – 7 pieces, determining the insulation value
Reinforcement	Galvanized steel or composite inlay
Surface finish	Smooth white or colored foil with structure
Glass rubbers	Double or triple sealing, EPDM or TPE rubber
Glass filling	HR++, triple, solar control, soundproof or safety glass
Ventilation grilles	Integrated, self-regulating, optional
Certification	KOMO, VKG, SKG, CE, PKVW

jeofferte.nl helps you choose based on performance and appearance.
Whether you are going for low-maintenance renovation or energy-efficient new construction: via jeofferte.nl you compare multiple providers on profile type, finish, reinforcement and glass options – fully tailored to your home and living requirements.

 

When choosing plastic windows, it is important not only to look at the profile, but also at the type of window and the type of glazing. This has a direct impact on comfort, safety, insulation value and the appearance of the home or building.

jeofferte.nl advises to think about the right window type and glass combination for each room (living room, kitchen, bathroom, upstairs).

WINDOW TYPES

1. Fixed window (fixed glass)

• Non-opening window, only intended for light and views.
• Often used in combination with other window types.
• Highest insulation value (no hinges or ventilation parts).

Advantage: cheapest window type, excellent insulation
Application: facades, stairwells, skylights

2. Tilt and Turn Window (inward opening)

• Popular window type with plastic frames.
• Combines turning and tilting positions with one handle.
• Functional and suitable for ventilation and cleaning.

Advantage: safe, user-friendly, child-friendly
Application: bedrooms, bathrooms, upper floors

3. Top-Hung Window

• Small window that tilts inward at the top.
• Especially suitable for ventilation in small spaces.

Advantage: compact, simple, burglar-proof
Application: toilets, utility rooms, stairwells

4. Outward opening casement window

• Less common with plastic, more common with wooden frames.
• Usually equipped with a stay or scissor mechanism.

Advantage: no obstacles on the inside
Application: kitchens or situations with interior windowsills

5. Sliding window or -wall

• Horizontally sliding sash with a large glass surface.
• Space-saving and suitable for patio doors or conservatories.

Advantage: plenty of light, no rotating parts
Application: rear facades, balconies, modern extensions

jeofferte.nl works with suppliers who combine tilt and turn and sliding systems with burglar-resistant hardware and multi-point locking.

GLASS TYPES

1. HR++ glass (high-efficiency double glazing)

• Two glass panes with insulating coating and noble gas (argon or krypton).
• Standard choice for plastic frames.
• U-value approx. 1.1 W/m²K.

Application: homes, commercial buildings
Advantage: high insulation, favorable price/performance ratio

2. HR+++ glass (triple glazing)

• Triple glazing with two cavities.
• Very high thermal insulation (U-value approx. 0.5 – 0.9).

Application: new construction, passive houses
Advantage: maximum energy saving, less cold fall

3. Soundproof glass

• Usually asymmetrical or layered construction.
• Reduces noise pollution by up to 42 dB.

Application: homes along railways, highways or busy city roads
Advantage: quieter indoor climate

4. Solar control glass

• Reflective or absorbent coating that limits solar heat.
• Sometimes combined with HR++ or HR+++ properties.

Application: facades facing south, conservatories, large windows
Advantage: less warming, lower cooling needs

5. Laminated Safety Glass

• Two glass panes with a tough film in between.
• In case of breakage, glass shards stick to the film.

Application: ground floor, nurseries, sliding doors
Advantage: injury-safe, delays burglary attempts

6. Burglar-resistant glass (class P4A or higher)

• Multiple layers with reinforced film.
• Resistant to repeated hitting or hammering.

Application: entrance doors, luxury homes, commercial buildings
Advantage: increased burglary delay, complies with PKVW

7. Frosted glass / satin glass

• Opaque, translucent glass.
• Often used in combination with HR++.

Application: toilets, bathrooms, front door panels
Advantage: privacy without loss of light

jeofferte.nl – customized advice per situation

When requesting quotes via jeofferte.nl you will receive:

• Clear specifications per window and glass variant
• Technical advice on combination of turning directions, fittings and safety
• Explanation of U-values, ventilation options and sound insulation
• Comparison of total prices including installation, finishing and warranty

In summary – choice overview

Window type	Main features			Usage situation
Fixed window	Non-opening, best insulation			Facade, stairwell, skylight
Tilt and turn window	Ventilation + ease of cleaning, very common			Bedroom, living room
Tilt window	Small, tilting, ventilation			Toilet, hallway
Tilt and turn window	Outward opening, often with wood			Kitchen, bathroom
Sliding window/facade	Light, space saving			Garden side, balcony
Glass type		Characteristic	Application
HR++ glass		Standard insulation	Renovation, existing building
HR+++ glass		Very high insulation	New construction, passive house
Soundproof glass		Up to 42 dB damping	Highway, railway, flight path
Solar control glass		Reflects solar heat	South facade, conservatory
Safety glass		Laminated, impact-resistant	Children's rooms, doors
Burglar-resistant glass		Multiple laminated, class P4A	Front and back door
Frosted/satin glass		Privacy with light transmission	Toilet, bathroom, front door panel

Do you want to know exactly which window and glass advice suits your home type, wishes and budget?
Via jeofferte.nl you compare multiple quotes from certified frame specialists – including technical glass options, safety measures and energy performance.

 

The total price of a frame project depends heavily on the type of glass chosen. In addition to insulation value and safety, sun protection, sound insulation, and burglary protection also play a role. Below you will find an overview of the most common types of glass, including their average price per m² (fully supplied and installed).

1. HR++ Glass (High-Efficiency Double Glazing)

• Description: Two glass panes with a cavity filled with noble gas and an insulating coating.
• Application: Standard in virtually all plastic window frames.
• Insulation value (U-value): approx. 1.1 W/m²K

Price per m² (incl. installation):
€ 120 – € 160

2. Triple Glazing (HR+++)

• Description: Triple glazing with two gas-filled cavities for maximum thermal insulation.
• Application: New build homes, energy-neutral projects, passive houses.
• Insulation value (U-value): approx. 0.5 – 0.7 W/m²K

Price per m² (incl. installation):
€180 – €250

3. Soundproof glass

• Description: HR++ or triple glazing with sound-insulating film or asymmetrical construction.
• Application: Homes on railway lines, busy roads or air traffic.
• Sound reduction: up to 36–42 dB (depending on type)

Price per m² (incl. installation):
€ 160 – € 220

4. Solar control glass

• Description: Glass with a heat and sunlight-reflecting coating (e.g. SKN 176 or solar control film).
• Application: Conservatories, south-facing facades or in case of overheating
• Solar heat gain coefficient: up to 0.35 (65% solar shading)

Price per m² (incl. installation):
€ 170 – € 240

5. Safety glass – laminated (PVB film)

• Description: Two glass panes with a tough film in between, stays together if broken.
• Application: Ground floor, balconies, sliding doors, children's rooms.
• Safety class: 3.3.1 to 6.6.2

Price per m² (incl. installation):
€ 150 – € 200
(combination with HR++ or triple possible)

6. Burglar-resistant glass – extra laminated

• Description: Multiple layers of laminated glass with reinforced foil; delays break-in attempts.
• Application: Security at vulnerable locations (front or back door, villas)
• Standard: SKG class P4A or higher

Price per m² (incl. installation):
€ 190 – € 260

7. Frosted glass / satin glass

• Description: Opaque glass with a satin or frosted texture.
• Application: Bathrooms, toilets, front door panels

Price per m² (incl. installation):
€ 130 – € 170

Summary – price list glass types (incl. installation and VAT)

Glass type	Average price per m²	Characteristics
HR++ glass	€ 120 – € 160	Standard insulating glass
Triple glazing (HR+++)	€ 180 – € 250	Maximum insulation value
Soundproof glass	€ 160 – € 220	Up to 42 dB sound reduction
Solar control glass	€ 170 – € 240	Reduces solar heat
Laminated safety glass	€ 150 – € 200	Fall and cut resistant, even when broken
Burglar-resistant glass	€ 190 – € 260	Extra reinforced for security
Frosted glass / Satin glass	€ 130 – € 170	Privacy without light loss

jeofferte.nl – Customized glass advice

When requesting a quote via jeofferte.nl, it is important to:

• Explicitly state the desired glass choice
• Indicate if there are special circumstances (noise, sun, safety)
• Discuss any combinations (e.g., HR++ + laminated + solar control) in advance

jeofferte.nl helps you compare glass quotes based on price, performance, and application – so you don't pay for over- or under-quality.

 

Modern double glazing variants such as HR++ and HR+++ offer significant advantages in terms of insulation, comfort, energy saving and value development of the home. Compared to older double glazing or single glazing, the performance improvement is substantial.

When installed via jeofferte.nl, only glazing products with CE marking, KOMO quality mark and optimal insulation values are used.

1. Higher insulation value (U-value)

• HR++ glass: approx. 1.1 W/m²K
• HR+++ (triple glazing): approx. 0.5 – 0.9 W/m²K
• For comparison:
• Old double glazing (1980–2000): 2.7 – 3.0 W/m²K
• Single glazing: > 5.8 W/m²K

Advantage: Less heat loss = lower heating costs and more constant indoor climate

2. Lower energy costs

• HR++ glass provides savings of up to € 250 – € 450 per year for an average household.
• Triple glazing can increase these savings to € 600 per year for a well-insulated home.

Explanation: The initial investment pays for itself in an average of 7 to 12 years through energy savings.

jeofferte.nl helps you to make the payback period transparent in every quotation proposal.

3. More living comfort

• Less draft near windows
• No more cold drafts in the winter
• More even temperature in the room

Effect: Pleasant indoor climate without temperature fluctuations, especially with larger windows.

4. Less condensation

• HR++ and HR+++ prevent condensation on the inside of the window, because the glass on the inside stays much warmer.
• Condensation between the glass panes indicates leaky glass and requires replacement.

Consequence: No mold or moisture damage to the frame or windowsill.

5. Better acoustic comfort (when combined with soundproof glass)

• HR++ and HR+++ glass have better sound insulation than single glass.
• When using asymmetrically constructed HR++ glass or laminated glass, noise from outside is effectively dampened.

Application: Homes near busy traffic, railway lines or city centers.

6. Increase in value and label of your home

• Replacing glass with HR++ or triple contributes to a better energy label.
• Potential buyers value low energy costs and modern insulating glass.

Advantage: Higher selling price, faster sale and lower EPC value for new construction.

7. Less CO₂ emissions

• Less gas consumption also reduces the ecological footprint.
• Up to 400 kg CO₂ reduction per year with complete house replacement (HR++).

jeofferte.nl works with partners who combine sustainable placement with glass recycling.

8. Fire-resistant and maintenance-friendly

• HR++ and HR+++ glass are fire-resistant (class A1) and resistant to temperature differences.
• Glass is easy to clean and requires no extra maintenance compared to standard glass.

Comparative overview HR++ and HR+++

Characteristic	HR++ glass	HR+++ (triple glazing)
Insulation value (U-value)	approx. 1.1 W/m²K	approx. 0.5 – 0.9 W/m²K
Energy saving per year	€ 250 – € 450	€ 400 – € 600
Purchase price (incl. installation)	€ 120 – € 160 per m²	€ 180 – € 250 per m²
Weight per m²	Average (25–30 kg)	Heavy (35–45 kg)
Application	Renovation, standard construction	New construction, passive houses
Ventilation required?	Yes	Yes (extra important)

jeofferte.nl – Glass advice with return

Via jeofferte.nl you will always receive customized offers with a clear specification of the chosen glass:

• Including U-value, safety class, gas filling and spacer
• Optional: solar control, soundproof or laminated glass
• Including placement, finishing and warranty (often 10 – 15 years)

Get good advice on the right type of glass for your home type, orientation and comfort requirements.
jeofferte.nl compares offers from recognized glass and window frame specialists – fast, transparent and without obligations.

 

Installing plastic windows requires expertise, careful preparation and careful execution. jeofferte.nl works exclusively with experienced installers who approach each project according to fixed quality steps. Below you will find the complete process, explained step by step.

1. Measurement and advice at home

A specialist comes on location to take all window sizes exactly. Attention is paid to:

• The existing situation (day sizes, wall connection, ventilation)
• Direction of rotation and layout
• Insulation requirements (HR++ or triple glazing)
• Color, profile type and finish

jeofferte.nl ensures that this measurement takes place free of charge or without obligation, depending on the chosen provider.

2. Production of the plastic windows

After approval of the quotation, the windows are custom-made in the factory. This usually takes 2 to 5 weeks. This takes into account:

• Exact dimensions
• Built-in ventilation grilles
• Glass selection (HR++ or triple)
• Color scheme (RAL of your choice)
• Optional wood grain structure or foil finish

jeofferte.nl works exclusively with frame suppliers who produce according to VKG or KOMO quality mark.

3. Preparation on location

Prior to installation, the executing company ensures:

• Covering of floors and window sills
• Accessible workspace
• Possible use of aerial platforms or scaffolding

Customers of jeofferte.nl receive clear instructions in advance for smooth preparation.

4. Removal of existing frames

The old frames are professionally removed without causing unnecessary damage to the facade. This includes:

• Removal of rebates, glass and profiles
• Disposal of old material according to environmental standards
• Inspection of the reveal and wall recess

These activities are included in the total price at most jeofferte.nl partners.

5. Placement of the new frames

The new plastic frames are:

• Aligned and positioned with shims
• Mechanically anchored (frame screws or plugs)
• Finished airtight all around with compriband or sealant

jeofferte.nl always advises choosing placement according to the KOMO guideline for optimal airtightness and durability.

6. Glass installation and finishing

After the frame is firmly in place, the glass is installed:

• Glass (HR++ or triple) is carefully inserted
• Glazing tapes and glazing beads ensure correct fixation
• Interior and exterior finishing with sealant, trim or window sills

You can also include extra options such as sun-resistant or burglar-resistant glass in the quote via jeofferte.nl.

7. Adjustment and delivery

After installation, all turning and tilting parts are tested:

• Locks, handles, rubbers and mechanics are adjusted
• Direction of rotation, ventilation position and closure are checked
• Delivery takes place together with the client

jeofferte.nl advises clients to have any delivery points recorded directly in a transfer document.

8. Disposal and Clean Delivery

• Waste, packaging and old frames are taken away immediately
• Space is left broom clean
• If agreed: window sills, thresholds or window coverings are reinstalled

9. Aftercare and Warranty

After installation you will receive:

• Warranty certificate on frame (usually 10 – 15 years)
• Glass and installation warranty
• Maintenance advice (e.g. annual cleaning, greasing rubbers)

jeofferte.nl checks whether the installer has clear warranty conditions and service agreements.

In summary – Process overview

Step	Description	Specifics via jeofferte.nl
Measurement	On location by a specialist	Often free or included
Production	Customization in factory (2–5 weeks)	VKG/KOMO-approved suppliers
Removal of old frame	Including demolition and removal	Usually included
Installation of new frame	Assembly, alignment and anchoring	Placement according to standard
Glass and finish	HR++ or triple, finish outside/inside	Extensive options via quotation
Adjustment and delivery	Testing, explanation and transfer	Clear inspection
Aftercare and warranty	Certificates and service	Control via jeofferte.nl

Do you want to be sure that your window project is professionally executed from A to Z?
Via jeofferte.nl you can compare multiple specified quotations free of charge from reliable window specialists – including installation, finishing and warranty.

 

Window frames not only determine the appearance of a home or building, but are also essential for insulation, safety, ventilation and comfort. Outdated or damaged window frames often cause unnoticed heat loss, drafts, moisture problems and increased energy costs.

jeofferte.nl advises to inspect window frames in time and – if necessary – to replace them professionally. Below you can read the most important signals and considerations.

1. Visible wear or damage

• Peeling paint or wood rot (in wooden frames)
• Cracks, fissures or warping
• Worn or loose sealant joints
• Discoloration in plastic or aluminum (due to UV aging)

Signal: structural damage or deterioration is often a direct reason for replacement – especially if it impairs the functioning of the window frame.

2. Drafts, moisture or condensation problems

• Cold draft along the edges
• Condensation between the glass panes (in double glazing)
• Moisture spots or mold on the interior wall

Cause: often worn rubbers, outdated glass or poor airtightness
Solution: new frame with modern glazing and good sealing

jeofferte.nl sees this as one of the most common complaints in homes older than 20 years.

3. High energy bill and low insulation value

• Old double glazing or single glazing (U-value > 2.7)
• Poorly closing windows and doors
• No thermal break in aluminum frames

Consequence: energy loss, less living comfort, lower EPC score

Replacement with HR++ or triple glazing with plastic frames saves an average of € 250 – € 600 per year for a corner house.

4. Difficult to open, close or adjust

• Windows or doors that jam or are out of plumb
• Outdated hardware
• Poorly functioning tilt and turn systems

Consequence: reduced safety and ease of use
Note: this can also lead to burglary sensitivity with outdated hardware

5. No burglary resistance or safety certification

• Old frames do not meet SKG quality mark or Politiekeurmerk Veilig Wonen
• Lack of multi-point locking or safety glass

Advice: when replacing, you can immediately opt for safety locks, laminated glass and cylinder pull protection according to the latest standards.

6. Aesthetic or functional upgrade desired

• Desire for low-maintenance window frames (such as plastic or aluminum)
• Change of color, profile or style (during renovation or modernization)
• Adding tilt and turn windows, ventilation grids or solar control glass

jeofferte.nl sees a growing number of requests from customers who combine functional improvement with aesthetic modernization.

7. House older than 20 years? Have a window frame inspection performed

• The average lifespan of wooden window frames is 20–30 years (if well maintained)
• For plastic window frames, it is often 30–40 years
• Aluminum window frames can last 40+ years, but insulation standards change faster

jeofferte.nl advises to have a professional inspection performed after 20 years with a report on the technical condition and insulation value.

In summary – when to replace?

Signal	Reason for replacement
Wood rot, cracks or discoloration	Aesthetically and structurally insufficient
Draft, cold or condensation between glass	Poor insulation, glass or gap problem
Sticking, creaking or loose parts	Unsafe, impractical
High energy costs or outdated glass	Loss of comfort and return
Insufficient security or poor fittings	Vulnerable to burglary or uninsurable
Aesthetic or functional upgrade	Renovation, maintenance-free, color change

jeofferte.nl helps you with the right timing for window replacement
Via one request you compare quotes from recognized window specialists – including inspection, advice and customized solution. This way you know for sure whether direct replacement is necessary, or whether repair is still sufficient.

 

Plastic windows are known to be low-maintenance, but not completely maintenance-free. To extend their lifespan and maintain their aesthetic quality, it is important to clean them periodically and check their functionality. jeofferte.nl recommends a short maintenance round at least twice a year – especially for homes in urban or industrial environments.

Below you can read exactly what is involved in good maintenance.

1. Cleaning the surface

Frequency: 2 to 4 times a year

Requirements:

• Lukewarm water
• Neutral all-purpose cleaner (pH neutral)
• Soft sponge or microfiber cloth

Approach:

• First rinse off sand and dirt with clean water.
• Clean with soapy water and a sponge – never scrub.
• Rinse well and dry with a soft cloth.
• Avoid aggressive agents such as chlorine, turpentine or abrasives.

jeofferte.nl advises against using high-pressure cleaners: these can damage rubbers, sealant joints and foils.

2. Maintenance of rubber seals

Why: Rubbers provide a water and airtight seal. If they dry out or become damaged, this can lead to drafts, leaks and loss of sound.

Maintenance:

• Check rubbers for cracks or contamination.
• Clean with lukewarm water and mild soap.
• Lubricate 1 to 2 times a year with silicone spray or rubber care product (e.g. Vaseline).

jeofferte.nl advises to do this especially after the winter and before the summer months.

3. Lubrication of Hardware

Why: Well-lubricated hardware prevents wear, creaking, and stiff opening or closing of windows and doors.

Maintenance:

• Use a thin oil or lubricant on silicone or Teflon base.
• Lubricate hinges, locking cams, handles, and moving parts.
• Remove any dirt or sand before lubricating.

Frequency: At least 1 time per year, more often with intensive use.

4. Checking of drainage and ventilation

• Check drainage holes (at the bottom of the frame) and clear them of leaves, sand, or insects.
• Clean any ventilation grilles with a vacuum cleaner or brush.
• Check for moisture accumulation or condensation on the inside – this may indicate poor ventilation.

5. Inspection of glass and sealant

• Check the glass for scratches, leaky windows (condensation between glass panes) or discoloration.
• Check if the sealant joints are still properly connected to the wall and the profile.
• In case of cracks or loose sealant: have it repaired by a specialist.

jeofferte.nl advises to check this annually – possibly during spring cleaning.

6. Cleaning of colored or foiled frames

• Use only special plastic or foil cleaners.
• Avoid intensive polishing or scrubbing.
• Always work with a soft cloth and rinse well.

Extra tip: For\anthracite, black or wood-look frames, timely cleaning prevents long-term build-up or discoloration.

Maintenance schedule plastic windows

Component	Recommended maintenance	Frequency
Clean surface	Lukewarm water + pH-neutral soap	2 – 4× per year
Lubricate rubbers	Silicone spray or vaseline	1 – 2× per year
Hinges and hardware	Lubricate with oil or spray	1× per year
Check drainage	Keep openings clear	2× per year
Check glass	Scratches, leaking glass, condensation	Annually
Inspect sealant joints	Cracks, detachment	Annually
Clean ventilation grilles	Vacuum, brush	2× per year

jeofferte.nl – smart maintenance is a smart investment

• Well-maintained plastic frames last 30 to 40 years without loss of quality.
• Maintenance contributes to the preservation of color, insulation value and closing comfort.
• Pollution, drought or incorrect use of cleaning agents can affect warranty conditions.

All jeofferte.nl partners supply plastic frames with clear maintenance instructions and multi-year product warranty.

 

Plastic window frames are known for their low-maintenance nature, but regular cleaning extends their lifespan and keeps them looking presentable. jeofferte.nl recommends cleaning plastic window frames two to four times a year – depending on the location of the house and the degree of soiling (e.g. along highways, industry or coastal area).

Below you will find practical tips for a safe, effective and material-friendly cleaning.

1. Use mild cleaning agents

• Choose a neutral all-purpose cleaner (pH neutral) or a special window frame cleaner.
• Avoid aggressive products such as chlorine, scouring agent, turpentine or ammonia.
• Use lukewarm water and a soft cloth or sponge.

Tip from jeofferte.nl: do not use a high-pressure cleaner on the window frame connections – this affects rubbers and seals.

2. Clean in a fixed order

1. Rinse with water to remove loose dirt.
2. Clean the surface with soapy water and a soft sponge.
3. Rinse thoroughly with clean water.
4. Dry with a microfiber cloth for streak-free results.

For vertical frames, work from top to bottom. For tilt and turn windows: don't forget the inside of the frame profile .

3. Remove stubborn dirt with special cleaner

For black spots (e.g. due to rubber, oxidation or mold):

• Use a plastic cleaner with antistatic effect.
• Apply with a cloth, leave to act briefly, and wipe with a dry cloth.

jeofferte.nl advises against sanding or scratching contaminated parts – this damages the foil or the surface.

4. Maintain the moving parts as well

• Lubricate hinges and hardware (hinges, locking cams, handles) 1 to 2 times a year with silicone- or Teflon-based lubricant.
• Check rubbers for dryness or contamination, and lightly grease them with rubber care (vaseline or silicone stick).

Good maintenance prevents squeaky windows and ensures smooth opening and closing.

5. Pay attention to color and foil finish

• Extra caution is required with wood grain foil or colored frames.
• Never use abrasives or bleaches.
• Choose foil-suitable plastic cleaners, often available from the supplier or hardware store.

jeofferte.nl works exclusively with frame specialists who will inform you about the correct cleaning products per finish.

6. Prevent pollution through preventive measures

• Place window sills or overhangs where possible to limit splashing dirt.
• Avoid prolonged contact with leaves, bird droppings, grease or sand.
• Keep ventilation grilles free of dust and cobwebs.

7. Frequency of maintenance per type of home

Environment / location	Recommended cleaning frequency
Inner city / industrial area	4× per year
Average residential area	2–3× per year
Rural area / low pollution	2× per year
Coastal area / salty air	4× per year + extra inspection

jeofferte.nl – practical advice for long-term preservation

Upon delivery, you will usually receive maintenance advice from the executing party via jeofferte.nl. Check whether it includes:

• The suitable cleaning agents
• Maintenance of hinges and locks
• Warranty conditions in case of incorrect maintenance

Good maintenance protects your investment and keeps plastic frames in top condition for years – without painting or complicated treatments.

 

Buying plastic frames is an investment that lasts for decades. Making the right choice means not only considering the price, but especially quality, performance, guarantees, and installation. jeofferte.nl advises you to proceed carefully and in a structured manner. The tips below will help you with this.

1. Compare multiple quotes from recognized parties

Always request at least 2 to 3 quotes from specialized companies with demonstrable experience in plastic frames. Pay attention not only to the price, but also to:

• Specification of the profile brand (e.g., Schüco, Kömmerling, Veka)
• Number of air chambers and insulation value (U-value)
• Presence or absence of steel or composite reinforcement
• Type of glass and safety features

Via jeofferte.nl you can quickly compare multiple certified providers – without obligation.

2. Pay attention to quality marks and certifications

Quality frames always come with independent quality marks such as:

• KOMO-keur (product quality)
• VKG Keurmerk (processing and assembly)
• SKG (security of hardware)
• CE marking (conformity with European standards)

Check if these quality marks are explicitly stated in the quote or product description.

3. Choose a suitable profile type and number of chambers

The more air chambers in the profile, the better the thermal insulation. Choose:

• A minimum of a 5-chamber profile with HR++ glass
• A 6- or 7-chamber profile with triple glazing or an energy-efficient home
• A profile depth of 70–85 mm for good rigidity and insulation value

jeofferte.nl helps you choose based on property type, energy goals, and comfort requirements.

4. Pay attention to glass choice and insulation value (U-value)

Glass determines comfort, safety, and energy savings. Standard HR++ glass is suitable for most homes, triple glazing (HR+++) for new builds or passive houses.

Please note:

• Glass U-value (≤ 1.1 for HR++, ≤ 0.9 for HR+++)
• Gas filling (argon or krypton)
• Edge spacers (warm-edge or thermally broken)

Also consider extra options such as:

• Sound-insulating glass (in busy locations)
• Sun-screening glass (south facades or conservatories)
• Safety glass (ground floor, children's rooms, doors)

5. Carefully consider finishing, color, and foil options

Plastic window frames are available in:

• Plain white (RAL 9016) – standard and affordable
• Wood grain texture (Renolit foil) – matte and classic
• Colours such as anthracite, black, cream, dark green – modern or authentic

Please note:

• Exterior color ≠ required for interior
• Foil is UV-resistant, but requires proper cleaning
• Dark colors may be slightly more expensive (additional charge € 30–€ 70 per m²)

jeofferte.nl provides insight into color samples and matching facade finishes.

6. Look at warranties and service conditions

• Minimum manufacturer's warranty of 10 years on profile, glass and color fastness
• Installation warranty of 5 years with certified installation
• Check if service for damage or leakage is covered

A good supplier also provides:

• Maintenance advice
• Measurement report
• Installation certificate

7. Check ventilation facilities

Plastic frames are airtight, so active ventilation is necessary:

• Ask about self-regulating ventilation grilles
• Combine with CO₂-controlled systems if necessary

Lack of ventilation can lead to moisture or mould formation, resulting in health and warranty risks.

8. Have it measured and installed by a certified professional

Correct installation is just as important as the material itself. Please note:

• Sealing against moisture (EPDM tape, compression tape, or sealant)
• Correct connection to the facade (for cold bridge prevention)
• Precise adjustment of hinges and locks

jeofferte.nl exclusively works with professional companies that meet the installation requirements of the VKG Quality Mark.

9. Ask about grants or energy-saving measures

In some cases, you can use:

• ISDE subsidy when combined with home insulation
• Reduced VAT rate on labour for renovation of private homes (>2 years old)
• Sustainability loan or financing via the National Warmtefonds

jeofferte.nl automatically takes into account eligible work when requesting a quote.

Summary – buy smart window frames via jeofferte.nl

Step	Important for
Compare quotes	Insight into price/quality
Check quality marks	Certainty about quality and warranty
Profile type and glass choice	Insulation and comfort
Choosing colour and finish	Aesthetics and ease of maintenance
Having the installation done	Correct placement and sealing
Utilising subsidies	Lower net investment amount

jeofferte.nl helps you choose the right plastic window frames – professionally, transparently, and tailored.
Compare multiple no-obligation quotes from certified suppliers, with full insight into materials, glazing, finishing, installation, and warranty.