Should outside corners be double wrapped when using a self adhered wrb?
MikeonLI
| Posted in General Questions on
I’m using a self adhered wrb on my sheathing. The manufacturer specifies 12 inches of overlap on the outside corner.
However it doesn’t specify if that’s in both directions. If it’s in the same plane, Should I wrap side A 12 inches around the corner onto side B and then separately wrap Side B 12 inches around the corner onto side A? That would essentially double wrap the corner.
Or could I wrap all of side A so it goes up to the corner but doesn’t overlap it and the wrap side B around the corner 12 inches onto side A? Essentially one overlap on the corner. Please let me know. Thanks!
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Replies
Mike,
Or go past the corner 6" from each side, giving you a 12 " overlap.
don't think it matters much which option you choose.
Malcolm in my example one instance is single lapped on the corner the other is double lapped on the corner. You are saying single or double wrapped at the corner doesn’t matter much?
I meant if it’s in the same plane
Mike,
Vertical joints in any house-wrap have wider overlaps specified that horizontal ones. That's primarily what I think is behind the manufacturer's directions.
Does it matter if one side is single and the other doubled? It makes some sense to me to center the overlap at the corner to give equal protection to both sides of what is a location that is vulnerable to water ingress than most other parts of the wall.
Great Malcolm. Very helpful. Thanks so much