Category: Finishes
Prepared by Eng. Ahmed Fathy, Projects Manager ·
Definition
Double glazing is a unit of two glass panes with a sealed gap of dry air or argon, commonly 6 mm glass, 12 mm gap and 6 mm glass. A low-emissivity (Low-E) coating cuts incoming heat considerably.
Why it matters on a project
Windows are the weakest point in thermal insulation. The energy code sets heat transfer values for windows, and double glazing with Low-E is the usual way to meet them.
Measurement and pricing
Per square metre by build-up, thicknesses and coating, usually within the window price.
Common mistake
Fitting the Low-E coating on the wrong face of the unit, so its benefit drops.
Frequently asked questions
Does double glazing reduce noise?
It helps, and more so with panes of different thickness or laminated glass.
What does 6-12-6 mean?
A 6 mm pane, a 12 mm gap and a second 6 mm pane.
Related terms
- Aluminium windowsWindows with aluminium frames, sliding or hinged, single or double glazed.
- Thermal insulationMaterials reducing heat transfer through walls and roofs, required by the Saudi Building Code.
- Saudi Building Code (SBC)The mandatory design and construction requirements in Saudi Arabia.
- Material submittalA request to approve a material or product with manufacturer data and samples before supply.
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