Sometimes, these air flow channels are set up above a layer or two of rigid foam. It’s also feasible to get nailbase (a variety of SIP with OSB on a person aspect rather than two) that includes built-in air flow channels amongst the OSB and also the rigid foam; one brand of such panels is Neat-Vent from Hunter Panels.
Like most mansard roofs, your roof is unvented. Your mansard roof has distinct sections -- the steep sections on the perimeter, as well as low-slope section in the center. These sections should be insulated in the same way, simply because these roof assemblies are unvented.
Feels like you may have the framing and roofing in position. Your choices are explained in the report higher than--you'll be able to add venting by installing baffles beneath the sheathing to hold back the insulation, or it is possible to install at the least R-twenty of air impermeable insulation.
Code would not look to apply as it's grandfathered in. It appears like I need to redo the hall ceiling.
I utilised to operate being a roofer, and roofs which have been totally included with Ice & H2o Protect make me nervous. I see such a structure as lazy and most likely problematic.
That you are describing a cathedral ceiling that incorporates all probable faults. There was no interest to air sealing. The worst achievable insulation was made use of (fiberglass). As well as the roof assembly is unvented. So it is actually no surprise that you are seeing condensation.
Doug... For many purpose I did't see your write-up #seventeen. Seems like two of us at the very least Feel there could be a very simple cheap Resolution.
Here is the regular answer for many who must comply with most building codes (The solution comes from an posting by Mike Guertin):
Yesterday we blew the insulation and set up the SIGA Majcoat within the CAPACES Management Institute. There was greater than 8,000 Cubic feet of insulation to install, so our insulators experienced two in their blower vans and an excellent crew on web page. They ended up blowing cellulose as rapid as they could as well as the the rain was heading our path. Lower than forty five minutes after the insulation was accomplished we had finished the Majcoat and had been occupied More Help taping seams.
We wish to increase monitor lights to the new ceiling, with its electrical supply running with the new cavity created for the insulation. The present lover also wants its electrical offer to run by that Room.
The roof appears to possess a layer of asphalt shingles over the sheathing that has a tin roof more than that. The soffits are shut off. Your home is way off the overwhelmed path and It really is tricky to get any contractors in existence to operate, not to mention provide bids so I'm just about alone.
A. If the target is to install a superb air barrier, then drywall is surely satisfactory, provided that you seal all penetrations in order to avoid air leakage. For additional on putting in drywall in an airtight way, wikipedia reference see Airtight Drywall.
Yes a cathedral ceiling detail could be extremely comparable but the problem of numerous cathedral ceilings could be the added structural features, electrical packing containers, and the desire for Wooden board ceilings all which start out compromising the drywall layer which with your element is utilized with the air barrier.
As your home flexes with modifications of temperature It really is achievable, even probably that several of the foamed-in air sealing will leak. It might be really worth doing two" of open up cell foam on the inside facet of which might be a far more versatile and reliable long run air seal.