With taped exterior sheathing, is there any benefit to caulking each stud bay?
I have 1/2 cdx sheathing taped with zip tape. I takes the sheathing to all window rough openings as well. I was planning on caulking or applying acoustic sealant to the crack between the sill plate and the bottom of the sheathing and again at the top plates. The sheathing was not glued or gasketed at these joints.
Since all of the other sheathing joints are securely nailed to blocking and taped with ZIP tape I presume there is no point to caulking the stud bays?
As a side question, is it possie to substitute roofing tar in place of acoustic sealant? I am referring to the large tubes of roofing tar that can be used in caulk guns. Seems like it would work at a much cheaper price point. If not, please share your thoughts. Does anyone has a decent source for acoustic sealant? I can’t find it at the box stores and it’s very expensive online.
Finally, I just wanted to say how great the zip tape is. While plowing snow I damaged a section of sheathing (backed into it with trailer hitch) and had to replace a section in the cold of winter. The zip tape I had applied three months prior was stuck so well to the cdx plywood that it literally pulled the wood off the plywood! This was in cold weather. I’m impressed.