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High Performance uPVC Windows

Windows.

Two series, one idea: uPVC outside, a steel core inside. Pick by wall type, sightline and how much performance the project asks for.

The flagship
Vi6

Quiet. Tight. Strong.

Vi6 corner cutaway
Profile82 mm (3-1/4″) · six chambers
GasketsThree
HingesConcealed
Corner weldSeamless
InstallationClips
Best classAW-PG100
Best certified U-factor0.17 casement
Best STC / OITC47 / 40
See Vi6 ›
The slim one
Vi5

Slimmer sightlines. Nailing fin ready.

Vi5 corner cutaway showing the steel core
Profile70 mm (2-3/4″) · five chambers
GasketsTwo
HingesStandard, visible
Corner weldGrooved
InstallationClips, or a nailing fin
Best classAW-PG70
Best certified U-factor0.20 casement
Best STC / OITC39 / 33
See Vi5 ›
PTAC louvers ›Curves and shapes ›Grilles and divided lites ›All options ›

High Performance. Made for —

Made for mid‑rise.
The buildings these windows are engineered for.
Open ›
Made for sound.
OITC 40. STC 47.
Open ›
Made for energy.
NFRC-certified down to U 0.17.
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Made for strength.
AW-PG100. Steel in every frame.
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Not sure which?

Send the drawings. We will suggest a series for each wall type.

Send plans

Send plans