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Attic baffles - GreenBuildingAdvisor Hi there, Building in northern Canada, ventilated attic The framer did his own baffles made of plywood, however he installed baffles every 4 rafter and blocked the other cavities with […]
Will positive pressure work to vent an attic (i. e. , blowing air in . . . My father is interested in removing heat from his attic to try to keep the upstairs of his house somewhat cooler I have advised him that generally speaking, attic fans are a bad idea, which he has come to terms with However, with that understanding that creating negative pressure in the attic can cause all kinds of problems (sucking out air from the conditioned space, possible back-drafting
How to Insulate and Air-Seal Pull-Down Attic Stairs Pull-down attic stairs are super-sized attic hatches that just beg homeowners to store more stuff in their attic Besides the air-leakage and insulation problems stemming from having a particularly large hole in your ceiling, pull-down stairs creates a potential storage headache For homeowners, a storage problem usually means “not enough space ” For energy auditors, a storage problem
House under extreme negative pressure NOT due to the hvac system . . . I have no attic fans or whole house fans The chimney is well sealed Our house is under a lot of negative pressure and as a result it’s very cold in the winter This air pressure is independent of the hvac system, as you can feel an influx of air through any little opening on the Lower floor at all times, even when the hvac is off
Raised-Heel Trusses Make Better Enclosures Even if an attic started with some insulation over the exterior walls, there may not be any there after a while if the attic is subject to wind-washing That sheathing on raised-heel trusses makes it nearly impossible for the insulation on the edge to be blown inward The same principles apply to roofs framed onsite
Insulated Rooflines and Shingle Temperatures One of the most common questions I get when I describe homes with insulated rooflines is, "What does that do to the shingles?" Some roofing companies have made noise about this topic, saying that if the shingles can't conduct heat downward into the attic, the shingle lifetime will be greatly reduced
High humidity in spray foam attic - GreenBuildingAdvisor Hello all, Last fall I had my attic spray foamed Warm temperatures have arrived and I am experiencing higher than anticipated temperatures and humidity in my attic I have 3 main questions (pertinent details follow): 1 Is a semi-conditioned attic RH in the 60 - 70% range cause for concern? 2 Should my attic be 10+ degrees warmer than the interior? It will get much warmer here in the coming
Attic Air-Sealing: Products and Materials Overview When air-sealing an attic, you’re going to need a whole array of different products, both for caulking and sealing as well as for blocking off big air leaks Here’s what I use
Attic remodel sistering rafters - GreenBuildingAdvisor After early framing help from a capenter, I’m taking on an attic renovation The carpenter installed knee walls at 35 inches Because the existing 2×6″ collar ties were only halfway […]