Cavity Wall

[The Lone Gunman]

My mate has a coal burning central heating boiler which has vents under the floor to feed it with air.

His cavity wall installers wanted to drill a similar enormous hole in his wall for no good reason & block up the existing vents...

I am using floor vents from the celar, then celar vents to the outside world. The air has to come in somewhere.

[The Lone Gunman]

Indeed.

Floor vents are sensible.

Drilling fecking big holes in walls isn't.

There a foot square hole behind the radiator in my living room... the draught is truly stupendous.

And it aids the ingress of wasps and bees, not to mention the mouse that I found under the gas fire.

Before cavity wall insulation the two vents in the inner and outer skin could be offset thus using the cavity as a baffle. If you fill the cavity the two vents have to be directly connected and the easiest way is on big hole straight through, and there we are back to the begining of the thread.

[wendigo100]

Before cavity wall insulation the two vents in the inner and outer skin could be offset thus using the cavity as a baffle. If you fill the cavity the two vents have to be directly connected and the easiest way is on big hole straight through, and there we are back to the begining of the thread.

Thank you. I assume that was in answer to my question, rather than to the quote containing Zeity's insect report.