DIY guideWindows

Single, double or triple glazed? How to tell

Hold a small light to the glass and count the reflections, then look for the spacer between the panes.

6 steps

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Pick a window and dim the room a little, so the reflections show.
Turn on your phone's flashlight, hold it against the glass, and look at it from the side.
Each pane shows two points of light. Two in all: single. Four: double. Six: triple.
At the edge of the glass, inside the frame: a metal or rubbery strip between the panes means a sealed unit.
Note which rooms have which, for drafts and for quotes.
Mist between the panes that you can't wipe off, or cracked glass: the seal has gone. Ask Handyman for a window pro, who can often change just the glass.

Handyman says: Fogged inside? I'll find a window pro.

Free for every home. Handyman asks a few questions, then books a pro it trusts.