What is the most effective method for sealing the 34-inch gaps where the wall meets the angled ceiling inside a shed – foam?
Asked by Carmen Römer 
4 months ago
Last Updated: July 26, 2024
So, I’m in this shed checking out where the wall meets the angled ceiling. There’s a gap as big as 3/4 inch. Any suggestions on the best way to seal it up? Would foam work? Thanks a bunch!
No need to fill it – let it be. Leave space for expansion
Is just making sure it’s sealed to prevent bugs and water from getting in.
If it’s just a shed, you might not need to worry too much. One idea is to use some scrap framing or cut-to-length lumber to put up. Is the outside well-covered?
Hey , the issue is not with the inside. There is some rotting on the outside, so I’m trying to protect the inside and prevent bugs from getting in (there are a few wasp nests inside). This single mom just bought her house, so I’m trying to assist her in preventing her shed from decaying.
Hey , make sure to also focus on weather sealing the outside, otherwise, everything you do on the inside will be pointless.
Put a lathe strip over it to conceal it
Have you considered using some foam backer rod?
My shed has a wire mesh on the inside and a strip at the top to prevent water from coming in. That’s how it looks like.
Foam can create quite a mess, especially if it seeps through cracks to the outside. Have you tried using flashing tape? It goes by different names like zip tape, protect-o-tape, or tuck tape. Getting to the outside and sealing from there is even more effective. You might be able to access behind the siding or under the roofing. Sealing from the outside prevents bugs and water from getting in, while sealing from the inside keeps bugs out but water might still reach the exposed plywood edges.
Foam is okay – a thin line is enough for expansion. Trim extra with a knife
If there’s a ridge cap, keep it open for ventilation. If no cap, seal it – not much benefit either way