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New construction exterior sheathing
Posted on 7/18/23 at 7:09 am
Posted on 7/18/23 at 7:09 am
Trying to get an idea before I meet with builder/draftsman.
Scenario details:
New construction in South Louisiana with open cell spray foam in exterior walls and on underside of roof decking. HVAC with dehumidifier and fresh air supply.
Roof - rafters, OSB, adhesive ice/water over entire deck, arc shingles
My main question is what is the best exterior wall design for our hot and humid climate while going with a tighter house with spray foam? 2x4, OSB, Tyvek or 2x4, plywood, Tyvek? Taped OSB/plywood seams under Tyvek?
Trying to find a balance with energy efficiency but also forgiveness when water does eventually get behind the cement board cladding. Just looking to see what most non-spec homes are going with these days. Interior walls will be sheetrock.
Scenario details:
New construction in South Louisiana with open cell spray foam in exterior walls and on underside of roof decking. HVAC with dehumidifier and fresh air supply.
Roof - rafters, OSB, adhesive ice/water over entire deck, arc shingles
My main question is what is the best exterior wall design for our hot and humid climate while going with a tighter house with spray foam? 2x4, OSB, Tyvek or 2x4, plywood, Tyvek? Taped OSB/plywood seams under Tyvek?
Trying to find a balance with energy efficiency but also forgiveness when water does eventually get behind the cement board cladding. Just looking to see what most non-spec homes are going with these days. Interior walls will be sheetrock.
9
Posted on 7/18/23 at 7:24 am to AyyyBaw
Make sure you get a quality guy to do your foam. You run the risk of creating a mold cultivating situation.
I'd trust builder on sheathing. House underlayment has come a long way.
I'd trust builder on sheathing. House underlayment has come a long way.
Posted on 7/18/23 at 8:13 am to AyyyBaw
ZIP System taped with zip tape and liquid flash nail holes. Or traditional OSB with peel and stick membrane applied such as henry blueskin.
Posted on 7/18/23 at 9:13 am to AyyyBaw
Huberwood.com
Posted on 7/18/23 at 10:32 am to AyyyBaw
Zip system.
It's easy to install, easy to inspect, and not over the top expensive like gyp sheathing/air Barrier/self adhered membrane.
It's easy to install, easy to inspect, and not over the top expensive like gyp sheathing/air Barrier/self adhered membrane.
Posted on 7/18/23 at 11:41 am to AyyyBaw
Look for the tyvek spec. Or call them. They’ll work with you if you use their product. Osb is fine on the wall. I don’t like osb on the roof. We use 98% 5/8 cdx on roof deck. Rarely get a request for osb.
Posted on 7/18/23 at 4:50 pm to AyyyBaw
I used radiant barrier osb on my roof and also after my walls were up I put up foam insulation board from Lowe’s on walls before the bricks went up. Taped the seams as well
Posted on 7/18/23 at 4:52 pm to AyyyBaw
Zip system. I will never build another structure without it, until something better comes along. The "stretch tape" alone is worth using it.
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[/url] This post was edited on 7/18/23 at 6:26 pm
Posted on 7/18/23 at 8:22 pm to AyyyBaw
Zip has made tyvek obsolete, imo. Only people still using tyvek are luddites.
Zip panels were high as shite for a while but last time I checked they were way down.
Zip panels were high as shite for a while but last time I checked they were way down.
Posted on 7/19/23 at 7:38 am to AyyyBaw
Check out Matt Risinger on YouTube …website. High performance builder out of Austin, has a ton of info on the proper way to build for our climate…main problem here is finding subs that can install per manufacturer recommendations. The product is only as good as the install!
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