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Ace Roofing Company - Roof Repair & Replacement
Austin, TX, USA
https://aceroofingtexas.com
+1 512-836-7663
You're describing a cathedral ceiling that incorporates all probable errors. There was no awareness to air sealing. The worst feasible insulation was applied (fiberglass). And also the roof assembly is unvented. So it is actually no surprise that you are observing condensation.
Code interpretations are subject for the resolve of your neighborhood creating inspector. In the end, it isn't going to make a difference what I think -- what issues is what your local code official thinks. So request her or him.
Q. "Really should I bite the bullet and threat of spray foam insulation, or send the builders back again up about the roof in December to cut ridge and soffit vents?"
If you prefer, you can Find your ventilation channels on top of the roof sheathing as an alternative to underneath the roof sheathing. If you choose to do this, make sure that any roofing underlayment that you put in higher than the roof sheathing is vapor-permeable — for instance, #15 asphalt felt, VaproShield SlopeShield, or Solitex Mento — and that your neighborhood setting up Office accepts this method of roof venting.
As an instance that a specific creating observe ends in a twenty% failure rate. That apply would be completely unacceptable to builders, who don't desire callbacks or problems. But that apply would nevertheless cause 80% of shoppers currently being glad.
If you wish to attempt a halfway Alternative that might or might not get the job done, you are able to eliminate several of the drywall near the ridge, and install spray foam insulation around the underside on the roof sheathing, just while in the area near the ridge beam.
I agree with you: I would prefer to see additional information on this situation. I am not mindful of any failures that have happened in effectively dense-packed unventilated rafter bays.
Re: the air barrier to be positioned higher than the pine T&G ceiling and under the foam, would you recommend that we use one thing and that is both of those an air barrier along with a vapor barrier? Or is it important to ensure that the product or service we find will not be a vapor barrier, so that any dampness that receives to the roof assembly can dry to the inside?
Most industrial roof assemblies Do not hassle with the fluffy stuff. They simply fulfill one hundred% on the R-price needs for the roof with rigid foam (possibly EPS or polyiso) and skip the batts solely. That's just how I advise that you proceed.
2. It appears like you are using metal beams to frame your hips. As I am certain you visit here realize, these metal beams are thermal bridges. All insulation has to be on the outside facet with the steel.
Ensure the roof assembly is as near to airtight as you can also make it. In case you are using fluffy insulation, you would like two air barriers: a single below the insulation, and just one above the insulation.
We had a Zip Roof installed as well as a steel Roof put more than it. The roof assembly is not really vented and taped all around the soffits. Preferably I might prefer to pack your entire cavity with blown cellulose. This string of discussions is giving me pause for assumed.
And lastly, I kow the recessed lights is Terrible, but what am helpful hints i able to do if it is by now put in? With on the list of lights I changed it about to the pendant light which minimized the heat near the roof though the air barrier continues to be a challenge.
Within the absence of an Our site airtight ceiling, roof air flow can do more hurt than superior, considering the fact that air movement in rafter bays can inspire indoor air to leak as a result of ceiling cracks.