Retrofitting wall insulation
Anyone know an easy way to retrofit wall insulation to a weatherboard house?
We have a weatherboard house, some of which has foil insulation and some of which doesn't. The foil that is there is pretty daggy and probably doesn't keep out the moisture reliably.
Short of pulling off all the plaster inside the exterior walls, or pulling off weatherboards, the only way I can see of insulating the walls is to use something that can be injected via a small hole.
Having used expanding foam for other purposes, that would seem dodgey and likely to bow the walls and/or leave gaps. So is there a non expanding foam that can be used? It would need to be a reasonable price, not wick moisture, and be electrically ok.
I suppose some of the blow-in products might be an alternative, if the hole required is not very large. My guess is that they'd be more likely to wick moisture if there was no foil.
I know you can access some of the inside of exterior walls by removing roof tiles and blowing in insulation, but that only gets you down to the noggin. Which is probably better than nothing, as the top half of the wall would likely lose more heat than the bottom half, because hot air rises. However the lower half of the outside of the wall probably gets colder so it might balance out.
