A. You should only use an installation process that the insulation contractor is informed about. Right here during the Northeast, numerous contractors would possibly fill your rafter bays utilizing the dense-pack strategy after your new roof sheathing was mounted.
Also, why not zip panels taped and then roxul batts with drywall in excess of that. Roxul is magnificent things I are screening for years in ridiculous methods endeavoring to see its abilities. I imagine that zip panels, taped thoroughly, with roxul batts will past providing the roof!
Hi All people. I see I am a little bit late to your get together on this thread but I hope anyone can nevertheless assist me. From my topic line you'll be able to see I have really the house. I am the home operator and disappointed with my leaky roof. I reside in WI and my roof has asphalt shingles.
Pertaining to dense pack cellulose: undecided why dense pack can be negated - I believe it flawlessly suited.
I thanks for this impeccably timed blog, as I am at this time framing my semi-basic cathedral ceiling hip roof (with quick ridge). I wish to explain my detail and try to understand where by I'm on the correct keep track of and much more importantly, exactly where I could have failures. Hope I can amuse several of you...I truly feel much like the far more I consider to deal with a concern, the greater of a concern it gets to be, And that i definitely don't desire to just take terrific time, care, and detail to aid the demise of my roof.
I think that most contractors would concern yourself with the buildability of one's strategy. The Picture reveals a small-slope roof around a flat ceiling; This enables employees to stand within the ceiling joists.
Why not merely do it right additionally Develop with pressure taken care of roof sheathing. Even common plywood can tackle wetting cycles again and again over our number 1 Tremendous economical OSB.
Most rafters aren’t deep plenty of to accommodate the insulation necessary to meet minimal R-values demanded by code, particularly if the rafter bays include a air flow channel.
If your local weather will not be way too severe It truly is most likely alright to have just the R-10 foam about the structural steel, Whilst there is certainly some risk the steel could sweat in chilly weather. I am assuming you also meant to insulate the 2x12 joist bays to Get the overall R-benefit to an affordable level.
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I am somewhat stumped on this a person - I might wish to vent this roof assembly, but I can't say whether there will become a pure convective movement as there can be with rafters sloping With all the roof pitch. My rafters are functioning amount Nevertheless they sit on parallel curved top rated plates. I can use twelve" rafters and make ten" of batt get the job done, leaving a good amount of air flow Place. I am able to drill the tops in the engineered joist flanges to permit ventilation 'up-slope' (perpendicular to your rafters) together with from the rafter bays, And that i can offer continual perimeter air flow (Cor-A-Vent strip) at my roof fascias (eave, ridge and gables).
Based on part R806.3 with the 2006 Intercontinental Household Code (IRC), “At least a one-inch Place shall be delivered in between the insulation and the roof sheathing and at the location of the vent.†This kind of vent Place can be developed by setting up 1 inch by one inch “sticks†during the upper corners of each rafter bay, followed by rigid cardboard, slender plywood, OSB, fiberboard sheathing, find more or panels of rigid foam insulation.
Here is a link to a GBA depth for an insulated roof assembly with vent channels over the roof sheathing and metal roofing:
A. Possibly solution will do the job, provided that you get not less than the least code R-price for your personal roof, and provided that you use development approaches that pay attention to airtightness.