FRP / glass-fibre composite window profile systems..
Pultruded FRP profile sets for fabricators evaluating a low-conductivity material platform. Each programme is released against a defined BOM, joint method and project test plan. FRP eliminates the need for a separate thermal break — the entire profile is the insulator.
Why FRP for window profiles.
Glass-fibre reinforced polymer (FRP) offers a fundamental advantage over aluminium for thermal performance: the entire profile is a thermal insulator, not just a narrow break strip. With thermal conductivity around 0.3 W/m·K — comparable to the PA66GF25 break in aluminium systems — FRP achieves comparable whole-window U-values without the complexity of a separate thermal break component. This makes FRP especially suitable for extreme cold climates (Siberia, northern Kazakhstan) where every watt of heat loss matters.
Material & manufacturing.
PINDÉ FRP profiles are manufactured by pultrusion — continuous glass-fibre rovings and mats pulled through a resin bath and heated die. Glass content is ≥60% by weight, with a polyester or vinyl ester matrix depending on the application. The unidirectional fibre alignment gives pultruded profiles high longitudinal strength (comparable to steel by weight) with significantly lower thermal expansion than uPVC.
Joint technology & fabrication.
FRP corner joints use a combination of mechanical fastening and structural adhesive — different from aluminium corner crimping or screwing. The fabrication package includes: cutting parameters (blade type, speed, feed rate for glass-fibre), drilling guidelines (carbide tooling, speeds to avoid delamination), bonding procedures (surface preparation, adhesive type, cure time, clamping), and dust control (glass-fibre dust requires HEPA extraction — not standard wood/aluminium dust collection).
Pilot programme.
Every new FRP fabricator starts with a qualification review (equipment, volume, target standard), followed by section samples and corner joint specimens. The paid pilot consists of 3–10 glass-free kits for local fabrication and testing. Only after yield, fit, logistics, and claims data are accepted does the programme move to micro-batch, project batch, and repeat supply.
Performance evidence.
Thermal, structural and weather-performance values are stated only for a verified specimen, glazing build-up and test scope. Cold-climate suitability is confirmed system by system. Frame depth or material conductivity alone is not used to infer whole-window performance. An evidence register tracks every test report number, laboratory, specimen size, glazing, hardware, and date.
Standards & compliance.
FRP profiles are tested to EN 13706-3 (pultruded structural profiles) and GOST R 57790 (composite polymer profiles for windows). Weather performance testing follows EN 12207/12208/12210 or GOST equivalents. EAEU conformity is confirmed separately for Russia, Kazakhstan, and Belarus with a local applicant and agreed sample scope.
FRP window systems are supplied through an engineering programme, not off-the-shelf. Thermal, structural and weather-performance values are stated only for verified specimens. Unverified values remain project targets — not sales claims.