Search results

Busyflyin, you will then have an under-insulated and non-ventilated cathedral ceiling roof. Snow on top of the roof will melt due to the heat loss from the roof, run to the eaves and freeze, forming ice dams. The asphalt shingles will be persistently wet and in my experience wet shingles...

Busyflyin, we're not talking the same thing. First of all, a SIP panel does not give you anywhere near the R38-R40 of insulation you need in your roof system. So if you install a SIP panel over vertical battens, you've created a nailing surface, but you have neither a vapour barrier, nor...

The code for minimum air channel is 2 inches. So by putting 2 inch vertical battens, you satisfy that requirement. However, don't forget that the purpose of ventilation is 1) to dissipate residual heat leaking past the insulation, and 2) to dry out any condensation that may be forming. If the...

Busyflyin, you have a beautiful cottage. If that was my place, I'd fill in the space between the rafters with blue styrofoam (5 1/2" should give you about R25-R30), install a vapour barrier across the rafters along the bottom edge, then nail on pine planks as the visible ceiling surface. This...

glennjanie, the reason I didn't mention the method is because it wouldn't actually deal with the issues that I brought up in my post. Yes it can be done, but it won't provide adequate insulation, nor will that method introduce a good vapour barrier to eliminate condensation, or will it...

You probably need R38 or R40 for your ceiling/roof. Depending on what kind of foam insulation you install, you get anywhere from R2 to R6 per inch. Fiberglas bats are usually around R3-R4. So your first challenge is to get enough insulation into your roof system to avoid heating the outside...

Ken, rent some scaffolding, and get yourself a helper. Moving plywood by yourself on one ladder is suicide. Gravity can be so unforgiving. With a properly installed scaffold, you have a safe platform to work on, you have a place to keep your materials, etc. You can also pull up the panels...

If there's an opening cut through the roof (vent, pipe stack, etc.), the cut is usually square, and it's possible to measure the thickness of an exposed edge. Saw your photo, and the decking is definitely darker than I would expect. I've uploaded three photos in my gallery that look closely...

It's probably getting late in the season, and don't know if you have already commited yourself, but... It's not clear to me what kind of sheathing you have on your roof. Is it OSB or plywood, or planks? What thickness? Do you have any pictures of the wood from inside the attic? You...