WDR Roofing Company Austin - Roof Repair & Replacement
Austin, TX, USA
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Like most mansard roofs, your roof is unvented. Your mansard roof has distinctive sections -- the steep sections at the perimeter, as well as minimal-slope section in the middle. All these sections must be insulated in the same way, for the reason that all of these roof assemblies are unvented.
1. You do not need an inside vapor barrier. In a hot humid climate, the vapor travel is always from the exterior towards the interior (assuming your setting up is air conditioned). If the setting up isn't at any time gonna be air conditioned, the vapor push will however be from the exterior to the interior, but there will not be A great deal vapor travel.
I have an unfinished attic, with cathedral ceiling, no insulation presently. in 5-10years we is going to be including dormers, but in the meantime i would want to insert insulation and drywall in the simplest, most reversible/salvageable manner. My plan is to hold two levels of 2 inch polyiso beneath the rafters, taped with staggered seams leaving the rafters empty, so essentially a vented assembly. I have added blocking to the floor joists and can make the polyiso ongoing while in the knee walls. I assumed I might incorporate furring strips in addition to the insulation then cling drywall, wondering that the furring strips would develop an airgap, enabling the foil to work as a radiant barrier.
In the event your weather isn't much too extreme It is likely all right to get just the R-10 foam over the structural steel, Though there is certainly some risk that the steel could sweat in cold temperature. I am assuming You furthermore mght intended to insulate the 2x12 joist bays to get your full R-price to some reasonable amount.
With my home the middle portion (20ft) is vaulted, a 3x12 slope and has 8 recessed lights during. I have experienced leaks in many locations With this part of your home, the leaks come about with the thaw and refreezing. It acquired The purpose previous calendar roofing company charleston sc year wherever I needed to shovel all the roof right after Every single snow drop.
If I understand the right way, you've just concluded setting up some recessed can lights, and now you want to know the way to insulate around and above these can lights. Your intention is to set up a different complete ceiling, underneath the rafters, after the insulation is put in. Is that suitable?
If you'd like to build an unvented insulated roof assembly, you most likely don't want to disturb the tile roofing. That means that quite possibly the most correct insulation helpful site could well be spray polyurethane foam. Of course, the present insulation need to be eradicated just before you install the spray foam.
The edges in the roof are protected with asphalt shingled (GAF Slateline to be precise). It seems like I need to pull down the fiberglass and possess it spray-foamed prior to I drywall.
The particular design and style proven was to get a Passive House. The roof thickness & usage of a services cavity may look like overkill for some jobs, but If you'd like an airtight lid, a company cavity can get you there - permanently... And assist you to wire and light-weight the interior.
Make certain the roof assembly is as close to airtight as you may make it. If you are using fluffy insulation, you require two air barriers: just one beneath the insulation, and just one higher than the insulation.
Rose Roofing was initially established with the site web target in mind of getting by far the most desired roofing contractor within the Charlotte, NC area by supplying leading-quality company at reasonable selling prices.
I am not a fan of entire peel-and-adhere roofs, for various reasons. But your plan will probably be wonderful. Just be sure that your roof sheathing is dry within the working day you install spray polyurethane foam -- because the sheathing will not be drying very much in both course immediately after It truly is encapsulated involving peel-and-stick membrane and spray foam.
The R price of your Reduce'n'cobbled foam + exterior foam needs to be at least 40% of the center-cavity R worth for dew point Manage in the foam/fiber boundary in zone five. If It can be developing a tiny bit shy of that right before incorporating the exterior foam it isn't really a large offer while in the temporary, but when it's going to be 5-10 years in advance of re-roofing to boost the foam-R to over forty% of the total It truly is worth using vapor barrier latex primer about the gypsum board, or a smart vapor retarder involving the gypsum board & fiberglass.