I've just moved into my first place and I can't figure out whether the walls are cavity walls or not!

The property was built in the mid-50's and the bricks are arranged in the 'normal' end to end arrangement and after measuring the walls, they are about 290mm thick.

Would this indicate a cavity wall or not?

Take the TV aerial socket off and have a look behind that. The box should sink in to the inner skin and you may be able to see the cavity or drill a short way in to find it.

DWD

Sounds like stretcher bond and at 290mm thick it should have a 40-50mm cavity

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Perfect, I'll pull the aerial box out and take a look. Hopefully if it is a cavity wall I can get it insulated before the winter!

as usual lee is right

Look at the house wall, excluding the part a foot from the corners. If all the bricks are side-on i.e. around 210mm by 65mm high, then it's a cavity wall. If some of them are end-on, i.e. 105mm by 65mm high, then it's not a cavity wall.

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