Thermally broken
W75 TB
The top of the thermal range. A 75mm construction depth takes high-efficiency triple glazing up to 52mm, with a glass-fibre reinforced polyamide isolator for the best insulation we offer — passive-house and alpine performance, in steel.

Specification
The fine print.
Profile depth75mm construction depth
Sightline27mm frame / 49mm leaf-frame
GlazingTriple, 26–56mm (units to 52mm)
Glazing — maximumTriple glazing up to 52mm
Thermal breakGlass-fibre reinforced polyamide isolator
U-valueUf from >1.0 W/m²K
Wind loadUp to Class C5 — 2000 Pa
Water tightnessUp to Class 9A — 600 Pa
Air tightnessUp to Class 4 — 600 Pa
Acoustic (Rw)Up to 44 dB (-2;-5)
SizingTo drawings
Compatible styles
Build it in W75 TB.
Configured to your drawings — talk to us about geometry, performance and sizing for this suite.
Next step
Configure your W75 TB and price it.
Choose a style, size, glazing, finish and hardware — made-to-measure in 50mm increments. We respond with itemised pricing, by elevation.