Vpete wrote:RD- it's different in my world but if you are digging down- seal the exterior and then spray foam the interior. once this directional boring is done my walls will be spray foamed. I was in another older house in my neighborhood last night and my buddy had his basement spray foamed and it was so dry and quiet it was weird. All the homes around here are between 80-100 years old.
We've had a lot of rain and most basements here get a little damp and his had nothing like that. I can't wait.
As for electrical it was absolutely necessary to upgrade. 100 amps is nowhere near enough anymore with home theatre, appliances of all types and lamps etc. I want power to burn and I can run back a conduit to my garage when it is done next year and have another sub-panel there.
Blob Mckenzie wrote:Which is why I use fibreglass.
I have tomorrow off and today I and the neighbour decided to crack open a 60 of rye.... CLOWN Royal.
You've been warned . I already pissed off the one non pot smoking neighbour I have by lighting a dube at 9 AM .
Topper wrote:What is the opinion on Roxul insulation? Molten rock spin like cotton candy. Melts at 1500C, does not burn.
Vpete wrote:RD I am doing basement walls and not wall cavities or attic, so we obviously have different issues going on.
Problem with spray foam is that there is no going back after. You are locked in and can't run bugger all in you walls after.
BCExpat wrote:Just one thing to note about urethane foam in place or sprayed insulation - it is being banned in some countries now because it may be hazardous to your health. I work on a lot of commercial projects, and I have specified it for miscellaneous locations - ie - tie ins of air/vapour barriers to underside of slabs, around windows, doors, etc. I could see this being banned in Canada eventually (or the urethane will be reformulated to be less hazardous). My point is, stay away from it in your home. Otherwise, you may end up like those who use Urea Formaldehyde spray insulation in their houses (ripping it all out at great cost).
RD - as for venting and what needs to "breathe" the simple rule is, whatever is outside of the air/vapour barrier needs to be able to exude any moisture which enters the wall (including condensation). The air/vapour barrier has to be on the warm side of the dew point in the wall (usually on the inside face of the insulation).
The thing about the polyurethane foams, is that they can be both insulation and air/vapour barrier. So, RD, you are right, urethane insulation does not "breathe".
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