Thermally broken

W50 TB

The entry thermally broken suite. Precision cold-formed sections with a high-density cast-in polyurethane isolator running the centre line to stop the cold path — identical sightlines and proportions to W40. The right call for cold climates and harsher exposures.

Tagline Thermally broken. 50mm.

Best for High-performance, alpine, coastal

Lead time 10–18 weeks

W50 TB steel windows and doors

Specification

The fine print.

Profile depthApprox. 50mm

SightlineMatched to W40

GlazingDouble or triple, up to 37mm IGU

Glazing — maximumDouble or triple glazing up to 37mm

Thermal breakHigh-density cast-in polyurethane isolator

U-value1.0 W/m²K (37mm IGU)

Frame U-value (Uf)Frame heat transfer from >1.50 W/m²K

Wind loadClass C3 (1200 Pa) inward; up to Class C5 (2000 Pa) outward

Water tightnessClass 7B inward; up to Class 9A (600 Pa) outward

Air tightnessUp to Class 4 — 600 Pa

Acoustic (Rw)Up to 43 dB

Max bar length5800mm

SizingTo drawings

Compatible styles

Build it in W50 TB.

Windows · Picture window. Maximum glass, no opening sash. 1–3 panes per unit.View →

Windows · Side-hung opening sash, hinge at jamb. Single or paired.View →

Windows · Top-hung, opens outward. Rain-tolerant. Pairs with fixed transoms.View →

Windows · Horizontal track. 2 panels, one fixed one opening.View →

Doors · One leaf, side-hung. Five style variants — differing pane configurations and lite layouts.View →

Doors · A pair of hinged leaves — “dual hinged”. Four style variants from full-glass to multi-lite.View →

Doors · Single or dual hinged with arched head — what aluminium can’t do. Style variants to drawings.View →

Doors · Centrally-pivoted on bearings. Single, dual, or with transom + sidelight.View →

Doors · Top-hung, bottom-guided. 2, 3 or 4 panels. We avoid bifold — sliding is more reliable.View →

Doors + Sidelights

Doors · A door framed by fixed sidelights and/or transom — a composed entry opening.View →

Next step

Configure your W50 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.

Configure & request a quote → Quick enquiry Back to the range