Fitting an Airbrick sleeve

[logized]

All the underfloor airbricks in my 1950s house have no sleeve through the cavity wall, there is just a brick missing on the inside wall. I want to ensure that they would not become blocked if I have cavity-wall insulation fitted. At the DIY store, I have seen two type of sleeve, a telescopic plastic type and a Terracotta type. Both types may be fiddly to install as the floor beams don't allow much room to manoeuvre the sleeve into place and secure it. Anyone have a better solution? Or could I just jam some rockwool into the cavity around the airbrick instead?

Dave

[Christian McArdle]

Would using Gripfill or other "Grabs like nails" type stuff help you secure a plastic one, without needing much access?

Christian.

[logized]

Christian, Thanks for your suggestion. One of my concerns is that the sleeve would also need to be supported on the airbrick side, so maybe I could also use that type of glue to stick a support of some sort to the outer wall to rest the sleeve on.

Dave

[Cicero]

=============== You might find it easier in the long run to replace the old airbricks with new so that you can get your sleeves in from the outside. It's not really a big job and and if you do it before the cavity walls are filled with foam (or whatever) you won't have any problems at all.

Cic.

[russell smith]

Why not get a can of expanding foam squirt into cavity all round opening then trim back with a knife when its set, one instant void former-- well nearly....

[logized]

Thanks Russell, I have a can of expanding foam that I bought in a sale a while ago, so I shall give it a go.

Dave