Six chambers,
one reason.
What you cannot see when the window is closed does most of the work. Here is what sits inside the profile we fit — and why each layer is there.
- 01Six chambers in the profileAir in the chambers is an insulator. More chambers means less heat lost and a quieter window.
- 02Steel reinforcementThe profile does not warp on large sashes, even after years of sun and frost.
- 03Two gasket linesThe sash seats all the way round — no draught and no whistling in the wind.
- 04THERMOPAN glazingDouble or triple, with gas filling in the cavity. Low-E and acoustic versions on request.
- 05WINKHAUS hardwareGerman hardware with multiple locking points and micro-ventilation.
- 06RAL powder coatingAny colour you choose, the same on both sides or different inside and out. Wood decors too.
How to read the section
On the left of the drawing is the outer frame — the part that stays in the wall. To the right of it is the sash, the moving part that carries the glass. Between them are two gaskets, drawn as ovals, which seat when the sash closes.
The white rectangles inside the profile are the chambers — sealed pockets of air. The grey element in the middle of the frame is the steel reinforcement, the insert that holds the geometry of the profile.
At the far right is the glazing unit: two panes with a cavity filled with inert gas, and a spacer with desiccant at the bottom that absorbs moisture from the cavity.
Why air insulates
Still air conducts heat poorly. As soon as it is divided into small sealed pockets in which it cannot circulate, it becomes an insulator. The same principle works in double glazing, in a cavity wall and in a winter jacket.
That is why the chamber count means something: every partition is one more obstacle for heat trying to cross from the room to the yard. A three-chamber profile has three of them, a six-chamber profile six — at the same profile depth.
What to look for in a quote
- Chamber count and installation depth — 70 mm depth with six chambers is today's standard for living space.
- Whether there is steel reinforcement — mandatory on large sashes, and the item most often dropped to make a quote look cheaper.
- Number of gasket lines — two lines is standard; one line means weaker sealing in wind.
- Glazing make-up — 4/16/4 means 4 mm pane, 16 mm cavity, 4 mm pane.
- Hardware manufacturer — hardware is the part used most and the first to fail if it is poor.
More about the products themselves: PVC windows, Aluminium windows, Roller shutters.
Compare quotes properly.
Send us a quote you already have — we will tell you what is missing from it, with no obligation.