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Ace Roofing Company - Roof Repair & Replacement
Austin, TX, USA
https://aceroofingtexas.com
+1 512-836-7663
That you are describing a cathedral ceiling that incorporates all attainable mistakes. There was no notice to air sealing. The worst probable insulation was applied (fiberglass). And also the roof assembly is unvented. So it truly is no shock that that you are viewing condensation.
1. You don't want an inside vapor barrier. Within a very hot humid climate, the vapor drive is always from the exterior towards the inside (assuming your constructing is air conditioned). In case your building isn't really at any time likely to be air conditioned, the vapor generate will continue to be from the exterior to the interior, but there will not be Significantly vapor push.
If it looks as if I am from my depth right here... yeah, you wager, I'm. I'm merely a homeowner, with just a few days of World-wide-web investigate beneath my belt. Nevertheless the contractor is not really familiar with this roofing system, so we are having to figure it out jointly. Take pleasure in your help immensely.
Martin, I am grateful for your time and efforts, and immediately after reading several of your replies, I am able to see you happen to be passionate about building issues correct. Ideal for people, and also the planet. Thank you for Anything you do!! Ryan Nelson
This informative article was Very practical, Thank you! I have one query about making a vented assembly by earning an airtght technique with accuvents.
Having said that, in certain areas in the country, especially in the Northeast, insulation contractors are dense-packing unvented rafter bays with cellulose For many years. Because the method has deep roots in New England, numerous building inspectors accept these types of installations.
In order to use rigid foam, the very best destination to put it's on top of your roof sheathing, not i thought about this underneath your roof sheathing.
To avoid moist inside air from making contact with chilly surfaces near the ridge, you need a true air barrier and a true insulation layer. The best way to repair this problem is to reveal the rafter bays -- either from earlier mentioned or below, It really is your decision -- and pull out the fiberglass insulation. Set the fiberglass inside a dumpster. Then fill the rafter bays with spray polyurethane foam.
To start with, could it be very easy to determine whether or not a roof is ventilated? If no soffit vents or facet vents are obvious within the roof through the ground, does that signify the roof isn't ventilated?
two. It sounds like you're using metal roofing company asheville beams to body your hips. As I'm positive you already know, these steel beams are thermal bridges. All insulation should be on the exterior side of the metal.
I am a homeowner in Seattle. Possess a recently-framed, vented cathedral ceiling to insulate. Straight bays, 2x12, 24" o/c. The current plan is to implement batts of some sort in the bays, take care to air seal the inside surface, stay clear of penetrations, air seal the vent channel also (bays totally sealed), double primary the inside surface for vapor resistance. I've a couple questions about baffling the vent channel: 1. A few of the setting up pros I am Functioning with experience the jury remains out on baffles and therefore are recommending leaving the batts open to the channel other than near the vents, assuming the 1-two" air channel might be preserved.
At last (I guarantee This is certainly my very last subject). Pertaining to my fiberglass batts: Will the facing that will come with it retard the drying out method that I described previously mentioned (will it issue what side I set it on within the purlin cavity?
If you do while you suggest, you'd gain an addition take advantage of the R-twenty insulation above the roof sheathing. That claimed, the method you explain would not fulfill code needs For brand spanking new building, simply because ideally any insulation accustomed to supplement the rigid foam higher than the roof sheathing really should be in immediate Call with the underside in the roof sheathing.
Are you wondering the 'flat' vented cavities will not likely view it give the assembly with an exhaust route for moisture?