Certainly, you'll however have thermal bridging with the rafters. But you will not have any moisture problems.
Okay, I was figuring that the entire on the rigid foam + cellulose needed to be a particular R-price together and were considering utilizing significantly less rigid foam. I have been reading through about distinct kinds of cellulose. Because I am setting up from previously mentioned would a thing like stabilized cellulose work as it has a little bit drinking water extra?
Looking at the fatal pic I come to feel there may be a simple nevertheless unorthodox Remedy. All of the rot from heat wet air fulfills chilly wood is right near exactly where a vented hip can have averted all and WITHOUT vent chutes.
I are in northern Vermont, and I haven't got enough experience with air con to answer your question about condensation on interior ducts.
I now recognize that stucco can't be placed on a roof, so I'll revert on the a steel roof, but nevertheless want to obtain an unvented attic. I have read through by way of "Developing a conditioned attic", and am nonetheless not sure regarding the best way to move forward.
Dan Reams, thanks for your remarks. I also live in snow place near Yellowstone National Park. I normally have well about 3 ft of snow on my cathedral roof. I think the dew place is commonly inside the snow instead of inside the roof. The R price of the snow is frequently close to the R value of the roof. This may lead to huge ice dams. A simple thermal Examination exhibits that you cannot place a functional volume of insulation while in the roof to circumvent the ice dams and transfer the dew stage into your roof.
As stated above, we hope to replace the roof this subsequent year. In that case, At the moment I'd want to update to both an unvented roof or if vital a cold roof (a vented above-roof). (I don;t know that it issues from the equations, but we are investigating obtaining and setting up stamped metal shingles.
Last but not least (I guarantee this is my last topic). Regarding my fiberglass batts: Will the dealing with that comes with it retard the drying out approach which i described previously mentioned (does it make any difference what facet I place it on inside the purlin cavity?
It is great to include foam board earlier mentioned the roof deck In spite of the closed mobile foam-board (what sort?) on the interior. Roof decks can not dry to the exterior by 0.one per shingles anyway, specifically considering the fact that in zone five it can expend a substantial amount of time coated in snow/dew/rain Along with the dampness travel heading inward, site here not outward.
Like most mansard roofs, your roof is unvented. Your mansard roof has distinct sections -- the steep sections at the perimeter, plus the lower-slope part in the center. All these sections need to be insulated in the same way, because most of these roof assemblies are unvented.
The roof seems to have a layer of asphalt shingles about the sheathing with a tin roof around that. The soffits are shut off. The house is way from the beaten route and It really is challenging to get any contractors in existence to operate, let alone present bids so I am virtually by myself.
This roof assembly seems very cathedral but if i comprehend appropriately its not vented in any respect, but has generous higher than sheathing foam. Is that this regarded as a vapour Risk-free assembly considering this post claims "Set up rigid foam insulation earlier mentioned the roof sheathing and air-permeable insulation in between the rafters.
To stop moist inside air from getting in touch with chilly surfaces close to the ridge, You'll need a actual air barrier and a real insulation layer. The best way to repair this issue is to show the rafter bays -- both from earlier mentioned or down below, It can be your read here alternative -- and pull out the fiberglass insulation. Put the fiberglass inside of a dumpster. hop over to these guys Then fill the rafter bays with spray polyurethane foam.
I'm not a supporter of total peel-and-adhere roofs, for various factors. But your system will probably be great. Just Guantee that your roof sheathing is dry over the working day you install spray polyurethane foam -- as the sheathing won't be drying a great deal in possibly path immediately after It really is encapsulated concerning peel-and-adhere membrane and spray foam.