Ok so last winter I felt like i was freezing my bollocks off in the house with the heating ON..
This year I replaced the windows and pretty soon afterwards I realised that it has made a bit of a difference but its still pretty cold..
Now my home is circa 1995 build, it has cavity walls, brick-cavity-breeze block-plasterboard and the walls are very cold to the touch, some more than others, there is no internal insulation in these walls like there should be in the building spec
i looked at cavity wall filling but it seems that there are two camps..people that think its a great idea and the other people that are having it removed because it has caused a lot of damp
so the other day after trying to decide weather to have the cavitys filled with insulation i wondered why i havent seen anyone fill the void between the plasterboard and the breezeblock with insulation foam?
so i tried it on one small wall in the downstairs toilet...i drilled a hole through the plasterboard until i hit breezeblock then i inserted a bottle of expanding foam and dumped 50% of it in there
the wall is warmer in that area..you can literally feel the difference, i cant see how this would cause any damp as it is after the cavity and if any water could get into that part of the house then maybe i would have more serious problems than cold walls?
i am very tempted to buy a few more bottles on the way home and finish off the job at least in that room but have i overlooked something?, why do people not do this when its mega cheap and very quick (more so for me as i am about to decorate that room so can cover any holes)