A. You will find a code need to get a vapor retarder in certain different types of assemblies, but there's no prerequisite to get a vapor barrier. Your layer of rigid foam is currently a vapor retarder. No even more vapor retarding layer must be installed.
Admittedly they are new products for Americans but they have been used properly in Europe For several years - so not likely new. It will probably be interesting to discover how the set up is adapted to our market.
Hello Everyone. I see I am a bit late on the social gathering on this thread but I hope someone can however aid me. From my topic line you could see I have quite the house. I am the home owner and pissed off with my leaky roof. I reside in WI and my roof has asphalt shingles.
Q. "I are actually using rigid breadboard fashion expanded polystyrene during the rim joists and believed a similar may very well be place under the sheathing between the rafter bays."
Applying ventilated nailbase panels is a perfectly great way to construct a cathedral ceiling. Exactly the same principles utilize as when working with SIPs: be sure that the seams are sealed for being as airtight as you can also make them, and make certain that the overall R-worth of your roof assembly satisfies or exceeds least code R-benefit requirements.
Hello John - This task was in Vermont in a very ten-year aged residence and as the caption implies, the most crucial perpetrator was leaky can lights within the cathedral ceiling. But your situation was exacerbated by an connected greenhouse, which communicated with the rest of the home, along with a outfits dryer vented on the indoors through the winter.
I feel you mean this: Your cathedral ceiling is presently uninsulated. When you find yourself indoors searching up, you could see your rafters. Previously mentioned the rafters you can see a layer of boards. Is the fact that proper?
I would like to promote Value-effective effectiveness in my current market, although not with the price of roof failure. We are a 5B climate zone with 6000 HDD, heating from mid-October to mid-April. We will also be extremely dry at 7000 ft over sea level.
(d) There might be ample air leakage within the "soffit" and ridge to offer air flow that acts just how a air flow gap ordinarily would.
When you're considering moving to a number of places or simply inquisitive about unique areas of the nation, you wish to have a look at numerous towns.
Unless one particular utilizes Excessive treatment with The nice and cozy aspect air barrier and this includes official statement being aware of that each one fastener penetrations are sealed at the same time you should suppose some air flow. The set up referred to in this article Using the ice and h2o defend under the shingles of course made a far better air barrier than whichever was on the warm facet.
The plan is to put in it (from The within of your home) with regards to the exact same time the drywall is set up. I will instruct my crew to verify there are no air pockets within the purlin cavities & no air flow into the latter.
Predicament similar to Eric, higher than. If closed mobile foam is sprayed or "cobbled" from xps, do You need to fill your complete Room, or only to thickness for wished-for R worth?
"After you have mounted the code-mandated thickness of rigid foam over your roof sheathing, you’re cost-free to install just as much fluffy stuff as you would like in between the rafters."