Green Building Forum - Fitting Windows Into a Concrete Block Cavity Wall. Mon, 25 May 2026 17:05:12 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 Fitting Windows Into a Concrete Block Cavity Wall. https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1683&Focus=20035#Comment_20035 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1683&Focus=20035#Comment_20035 Tue, 06 May 2008 12:13:34 +0100 EdF Fitting Windows Into a Concrete Block Cavity Wall. https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1683&Focus=20047#Comment_20047 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1683&Focus=20047#Comment_20047 Tue, 06 May 2008 18:04:57 +0100 tony
Easiest way to do job is to temporarily remove the opening sash, fix the frame (behind the hinge runners, refit the sash. Try using frame fixings with no plugs.]]> Fitting Windows Into a Concrete Block Cavity Wall. https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1683&Focus=20074#Comment_20074 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1683&Focus=20074#Comment_20074 Tue, 06 May 2008 22:00:00 +0100 chuckey Frank]]> Fitting Windows Into a Concrete Block Cavity Wall. https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1683&Focus=20078#Comment_20078 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1683&Focus=20078#Comment_20078 Tue, 06 May 2008 22:22:16 +0100 jamesingram screw them to the edge of the window frames so as they stick into the internal side (room) about half way
wedge the window in place with packers
drill and screw the straps to the revels ( plastered over later)
then foam the window in with expanding foam , use the frame fixing stuff as it expands less , you only need a little
use a foam gun if you can get one , tape a mastic nozzel over the end, to give you a adjustable flow, flatten it with a hammer for tight gaps
once the foams formed a skin you can push back into the gap to get it out the way and tidy it up, externally cover the gap with some kind of trim
perhaps wood
You can do it just with the packer and foam if you wont , I doubt any burglars will be clever enough to saw it out
and its a better fixing than any frame fixer and a lot less hassle]]> Fitting Windows Into a Concrete Block Cavity Wall. https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1683&Focus=20086#Comment_20086 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1683&Focus=20086#Comment_20086 Wed, 07 May 2008 08:15:57 +0100 EdF Tony, the walls are conventional cavity walls in 4" concrete blocks. I thought frame fixings didn't use plugs but had those plastic sleeves (same thing..?) Ed.]]> Fitting Windows Into a Concrete Block Cavity Wall. https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1683&Focus=20119#Comment_20119 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1683&Focus=20119#Comment_20119 Wed, 07 May 2008 13:43:18 +0100 tony Fitting Windows Into a Concrete Block Cavity Wall. https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1683&Focus=20135#Comment_20135 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1683&Focus=20135#Comment_20135 Wed, 07 May 2008 16:31:33 +0100 EdF Fitting Windows Into a Concrete Block Cavity Wall. https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1683&Focus=20137#Comment_20137 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1683&Focus=20137#Comment_20137 Wed, 07 May 2008 16:45:42 +0100 CWatters