WDR Roofing Company Austin - Roof Repair & Replacement
Austin, TX, USA
The air leakage that Dana outlined would keep your roof dry, but would undermine its thermal performance.
I such as the element delivered but I would not simply call that a cathedral ceiling condition mainly because it features ceiling joists spanning at the bottom of your roof rafters. I would get in touch with this an insulated attic.
"R-19 batts are very air permeable, and on long unobstructed rafter bays you might have fairly a stack impact. It doesn't take a enormous quantity of air leakage to offer some drying there. Also, Should the batts are unfaced or kraft-confronted, the drying toward the inside could well be considerable.
In keeping with portion R806.3 on the 2006 International Residential Code (IRC), “A minimum of a 1-inch Place shall be offered amongst the insulation along with the roof sheathing and for the location on the vent.” This type of vent House might be made by installing 1 inch by 1 inch “sticks” during the upper corners of every rafter bay, followed by stiff cardboard, slim plywood, OSB, fiberboard sheathing, or panels of rigid foam insulation.
If you would like create an unvented insulated roof assembly, you have two options: (a) You could incorporate rigid foam to the exterior aspect of your respective roof sheathing, accompanied by a next layer of roof sheathing and new roofing, or (b) You can insulate the underside of your respective roof sheathing with spray polyurethane foam.
The plan: Element A: I came across one" Dow rigid foam backed five/8CDX for a similar selling price as the bare CDX, And that i plan to double look what i found it up like a SIP, putting in The underside sheet foam aspect up and another sheet on best (staggered naturally) with the foam struggling with down, giving me 2" of insulation among the plywood.
Yesterday we blew the insulation and mounted the SIGA Majcoat to the CAPACES Management Institute. There was greater than eight,000 Cubic ft of insulation to install, so our insulators had 2 in their blower trucks and a superb crew on web site. They have been blowing cellulose as fast as they could along with the the rain was heading our direction. A lot less than 45 minutes after the insulation was done we had concluded the Majcoat and had been active taping seams.
I haven't got lots of space previously mentioned or below the roof framework for insulation / venting. Would a flash / batt unvented assembly work beneath the single sheathing deck? My insulator has completed Plenty of try these out of such regionally.
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We'll give it a check out. Present this website is really a fourteen yr old roof with two" of shut mobile roofing foam with an acrylic elastomeric coating.
Any property becoming developed a lot better than the absolute minimums must on the very least not use OSB for roof sheathing. Imo
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I am not a fan of whole peel-and-adhere roofs, for a variety of good reasons. But your plan will most likely be wonderful. Just be certain that your roof sheathing is dry to the day you install spray polyurethane foam -- as the sheathing won't be drying a great deal in both way following It truly is encapsulated concerning peel-and-adhere membrane and spray foam.
If the air inside of my house was humid unconditioned air, I will be Similarly concerned. But would not The within air be somewhat dry a result of the on-going air con? Must I be concerned out condensation forming on my AC ducts if I cathedralize my ceiling?