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WDR Roofing Company Austin - Roof Repair & Replacement
Austin, TX, USA
+1 512-820-1332

Q. "If I execute the unvented roof as intended and place 4 inches of polysio to the roof deck, can I then use open-cell foam among the rafters?"

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Ken's element (#10) does an excellent task of cold weather safety. It's what we are searhing for: Superior airsealing at the inside, fluffy things in the center, and fantastic drying channels for h2o vapor at the highest. By changing from a lower permeability sheeting to your high permeability membrane (at best) with venting earlier mentioned, there is no extra issue for roof rot whilst simultaneously wind washing is prevented during the bays because of the air & water restricted membrane with taped edges and seams. It seems to me to become a very durable assembly.

I don't determine what you necessarily mean by "unveiled." In zone three, you need at least R-30 of insulation (which means six inches of XPS). Once you've mounted R-30 of spray foam or XPS, you're finished. You could go away an air Room concerning The underside on the foam plus the drywall If you would like.

You might be describing a cathedral ceiling that incorporates all probable problems. There was no attention to air sealing. The worst possible insulation was used (fiberglass). Plus the roof assembly is unvented. So it is no shock that you might be viewing condensation.

one. Your recommendation is only a slight variation on a detail that is by now reviewed in my blog, namely cellulose installed with a vent channel between the very best in the cellulose along with the roof sheathing.

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Q. "I have lately gained usage of low-priced roofing polyiso -- black backing on each side. My emotion is that Placing this backing from the rafters in touch with that vented air could possibly be browse around these guys inviting a mold difficulty, and if i facial area it to the place i drop the radiant barrier."

As I described within the post on this web site, You can not use fluffy (air-permeable) insulation within an unvented roof assembly Except if you consist of rigid foam or spray foam over the fluffy insulation.

While roof air flow can assist dry out damp roof sheathing, it’s vital to limit the stream of h2o vapor escaping in the household so that the roof sheathing by no means will get moist to begin with.

A transparent thermoplastic acrylic Alternative that safeguards and highlights the colour and texture in the fundamental concrete tile floor.

Have you been aiming to repair service a shingle that has become weakened a bit or has been blown off in a very storm? browse our attribute on "How you can Fix a Missing Roof Shingle".

Even though the GBA website already has lots of content on The subject, we keep on to acquire frequent questions about Full Report the best solution to insulate a cathedral ceiling.

I are now living in northern Vermont, and I haven't got ample more info here expertise with air conditioning to reply your question about condensation on interior ducts.

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