Frame thickness is a quiet but important marker of a quality uPVC window. Here's why.
It refers to both the profile's overall depth (series) and the thickness of the uPVC walls forming its chambers. Thicker walls mean a more rigid, robust frame; thin walls flex and can warp.
Quality profiles maintain a sound wall thickness; bargain profiles sometimes thin the walls to cut cost. It's one marker among several — chambers, reinforcement, and formulation matter alongside it.
A sound wall thickness for rigidity, with the profile depth (series) matched to the window's size. Thicker walls resist warping; thin walls flex.
Yes — it's a marker of a quality profile. Very thin walls are a sign of cost-cutting.
Ask the maker about the profile's wall thickness and series — quality profiles maintain a sound thickness.
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