A. You ought to only use an installation strategy that the insulation contractor is accustomed to. Listed here inside the Northeast, several contractors would in all probability fill your rafter bays utilizing the dense-pack strategy soon after your new roof sheathing was installed.
The edges from the roof are covered with asphalt shingled (GAF Slateline to generally be precise). It looks like I need to pull down the fiberglass and have it spray-foamed before I drywall.
The GBA Internet site will not provide tailor made specifics. That is what an architect or an engineer is for; I counsel that you choose to seek the services of one.
A. To benefit from the insulating value of the rigid foam over the attic, you absolutely want to seal up any attic vents, and you undoubtedly don't need to make a ridge vent.
I doubt that the condensation is going on from the chilly ridge beam. Instead, I believe it is probably going that condensation is happening to the underside of the ridge shingles or perhaps the underside on the asphalt felt underlayment.
sips are great but in the coldest of climates they have encountered complications. google problem purposes in alaska - apparently a group of properties there were created but not sufficient notice to element to the plumbing and roof vents were taken under consideration (Totally air limited foamed in penetrations), mated panel seams and fastener punctures brought about the highest level osb to rot. For sure The complete roofs essential substitution.
I believe you necessarily mean this: Your cathedral ceiling is presently uninsulated. When you find yourself indoors hunting up, you could see your rafters. Previously mentioned the rafters you can see a layer of boards. Is the fact that accurate?
Does it make sense to spray and Slash and cobble 4 inch closed mobile foam/board on underside of sheathing followed by fiberglass Within the bays and 1 inch of eps/iso underneath the rafter (to prevent thermal bridging) before ending with drywall? Will I produce a vapor sandwich and much better go away the ultimate EPS and acknowledge the thermal bridging?
Probably the approach to go should be to accept 4" of froth around the cathedral ceiling, in lieu of eight" of foam, and never keep on the foam about the vented attic. There will be a Strange jog from the roof line the place the foam commences, official website but it will eventually mostly only be seen within the back of your house, not from the road.
With my house the center part (20ft) is vaulted, a 3x12 slope and it has 8 recessed lights in the course of. I have experienced leaks in quite a few areas With this area of the house, the leaks happen with the thaw and refreezing. It got The purpose very last calendar year exactly where I needed to shovel the complete roof following each snow tumble.
On an unrelated subject matter: The Cold Weather Housing Exploration Center has generated a video clip (beneath) showing one particular means of setting up an insulated cathedral ceiling. The tactic proven while in the movie is particularly suitable for builders in climates matter to ice dams.
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Who lives in these cities -- do the inhabitants skew younger or outdated? How racially or ethnically various is the populace in these towns?
A. Both technique will do the job, so long as you get a minimum of the bare minimum code R-benefit on your roof, and providing you use construction techniques that listen to airtightness.