Tried a foam backer rod on a big gap joint and got a nasty surprise

I had a 3/4 inch gap on a ceiling patch last week in an old house in Denver. Figured I'd try using a foam backer rod instead of my usual paper tape and mud first. The mud shrank like crazy overnight and left a deep crack right down the middle. Learned my lesson, backer rod is for caulking not drywall mud, has anyone else made a similar mistake with gap fillers?

2 comments

2 Comments

thomas29112d ago

Not sure that's the right use for backer rod... it's meant to sit behind caulk.

elizabeth_king12d ago

lol right, I made that mistake once too and it was a mess.