FRP Pultruded Window Profile

Spare Composites' FRP Pultruded Window Profile is an innovative alternative to aluminum and PVC profiles — combining the strength of metal with the thermal performance of non-conductive composite materials.

Key properties:

✅ Exceptional thermal insulation

Thermal conductivity: 0.34 W/m·K vs aluminum at 160 W/m·K — 470x better insulating performance

✅ High structural strength

Flexural strength up to 5x higher than aluminum profiles 25% lighter than aluminum

✅ Fire resistant

Failure temperature above 1100°C vs aluminum melting at 680°C

Fire integrity: up to 1.5 hours

✅ Corrosion and weather resistant

Resistant to acids, alkalis, salt spray and UV radiation

Coating durability 1.5x longer than aluminum powder coating

✅ Dimensional stability

Shrinkage rate below 0.2%

Thermal expansion coefficient close to concrete — ideal for prefabricated construction

✅ Sound insulation

Up to 45 dB acoustic performance

✅ Zero maintenance

No painting or treatment required 50+ year service life

Thermal performance by series:

Series 72 — New 75 standard:

Frame U-value: 1.1 W/m²·K

Double glazing whole window: k ≤ 1.6 W/m²·K

Triple glazing whole window: k ≤ 1.4 W/m²·K

Fire resistance: 1 hour

Series 80 — Ultra low energy:

Frame U-value: 0.95 W/m²·K

Triple glazing whole window: k ≤ 1.0-1.2 W/m²·K

Fire resistance: 1 hour

Available profile types:

— Window frame profile (NP7201)

— Window mullion/impost profile (NP7203)

— Inward opening sash profile (NP7202)

— Frame pressing strip (YXBZ1824)

— Panel pressure strip (YXBZ2820)

— Corner brackets and connectors

— Sealing strips and gaskets

Opening mechanisms available:

— Fixed light

— Inward opening casement

— Tilt and turn (inward open and tilt ventilation)

— Lift and slide door systems

Standard length: 6 meters

Custom lengths available

Surface finish:

Water-based polyurethane coating

Any color from international

RAL or NCS color charts

Wood grain effect available

Color: Light grey (RAL 7035)

Custom colors available on request

Where it is used:

— Passive house construction

— Ultra low energy buildings

— Energy renovation projects

— High-rise residential buildings

— Commercial and office buildings

— Schools and public buildings

— Historic building renovation

— Arctic and extreme cold climate construction

— Coastal and marine environments

— Fire-rated window applications