John Sayers' Recording Studio Design Forum Archive

I just discovered that my HVAC guy did this when installing the mini-split system in my studio in which I've gone to great lengths to avoid holes: He cut a 3" hole through my double 5/8" drywall/Green Glue decoupled interior wall and straight through to the exterior wall. The exterior he filled with some flexible caulk but it looks like much too large of a gap for that application.

Obviously this has majorly compromised my design. How should I fill these large gaps?

He cut a 3" hole through my double 5/8" drywall/Green Glue decoupled interior wall and straight through to the exterior wall.

So he didn't follow your instructions and put as "S" shape with the bundle of goodies from your inner to outer leaf?

How should I fill these large gaps?

Colored caulk has about twice as much surface density as drywall. So, if you can fill caulk to at least half the depth of your drywall you will be good to go. Chances are his caulk job is thin considering he clearly doesn't realize the importance of keeping the holes small and/or studio building whatsoever. You might be smart to try and carefully dig out his caulk job and redo it yourself.

Greg

Gregwor wrote:

... straight through to the exterior wall.

So he didn't follow your instructions and put as "S" shape with the bundle of goodies from your inner to outer leaf?

Well, not straight through. He staggered the holes so it makes an S.

Gregwor wrote:

How should I fill these large gaps?

Colored caulk has about twice as much surface density as drywall.
Greg

Does white "Big Stretch" flexible caulk count as colored caulk? Or do I literally need it to be a shade of color?

Does white "Big Stretch" flexible caulk count as colored caulk? Or do I literally need it to be a shade of color?

Most caulk comes in different colors. I've read that white caulk has a little more surface density and since it's the same price as clear, use white. I doubt it's a big difference but yeah, why not right!?

Greg