We program to transform to an improperly vented cathedral ceiling to an unvented 1. Sealing up the soffit vents is a no-brainer. What is actually the best way to deal with the ridge vent? Many thanks!
You ought to consult an electrician about The ultimate way to provide your ceiling electrical bins. There are several possible methods -- some seen from the interior, and a few concealed by the new foam.
Really should I deal with the flat roof as being a cathedral ceiling and select spray foam (or board), fiberglass, and no humidity barrier?
Throughout the summer time, roof air flow would not appreciably reduced the temperature of asphalt shingles or other kinds of roofing.
Very handy (five*) thread. So, if you have to use fiberglass insulation batts, and you also dont have use of spray foam or shut cell boards, what do you need to do? I suppose The important thing is to make it unvented and incorporate in other air-impermeable layers. I am about to insulate a fresh all-metallic cathedral pitched gable roof during the Caribean. The strategy should be to fill the cavity amongst the four" Z-purlins with R-eleven batting (vapor side facing the residing House). For additional heat conduction resistance we plan to roll One more thinner (filleted?) layer of the batting over the top of the purlins (ie involving the purlins along with the sheeting).
Thanks - This is often new construction, I am the designer / builder, and the greater I check out it, I'm liking all rigid - significantly less fussy. The top layer of rigid over fluffy tends to make my eave too thick anyways. The air barrier for that T&G ceiling is definitely the sandwich of felt and taped 3/8" CDX.
Set up a layer of closed-cell spray foam towards the underside of the roof sheathing, and fill the remainder of the rafter cavity using an air-permeable insulation. Again, this kind of assembly is built to dry to the inside, And so the assembly ought to hardly ever involve an inside polyethylene vapor barrier.
It seems like a wonderful system. Based on what sort of rigid foam you choose, you'll end up getting insulation within the selection of R-16 to R-24. Although that is under code prerequisites, it's Substantially, significantly better than what you've got now.
Even though roof ventilation may help dry out moist roof sheathing, it’s necessary to Restrict the move of water vapor escaping within the house so which the roof sheathing never ever receives moist to start with.
Like most mansard roofs, your roof is unvented. Your mansard roof has different sections -- the steep sections in the perimeter, and also the very low-slope part in the center. Every one of these sections need to be insulated in a similar way, since every one of these roof assemblies are unvented.
I am a homeowner in Seattle. Have got a recently-framed, vented cathedral ceiling to insulate. Straight bays, 2x12, 24" o/c. The existing approach is to use batts of some sort within the bays, get care to air seal the inside area, stay away from penetrations, air seal the vent channel too (bays thoroughly sealed), double prime the inside area for vapor resistance. I have a few questions on baffling the vent channel: one. A few of the creating professionals I'm working with sense the jury remains out on baffles and therefore are recommending leaving the batts open click this link up to your channel except near the vents, assuming the one-2" air channel is usually maintained.
But In the event the installer is conscientious, plus the rafter bays seriously are dense-packed, my guess is that all the things are going to be high-quality.
Will not make any hasty selections that you'll regret. If important, notify your roofer to prevent all work on this venture right up until this situation is settled (assuming, not surprisingly, that the roof sheathing is guarded by asphalt felt or a similar underlayment.)
Your home is at about 4,500 ft. We only get about 3' of snow a 12 months and it hardly ever stays within the roof for greater than 7 days a pair situations a yr. I am on a really restricted spending plan, just trying to make the location livable. Any strategies are welcome.