How To Close Ac Hole In The Wall. Hi all, i had a contractor install a split ac unit and they didn't seal the hole in the wall. While a hole through the wall of your home appears daunting, it is only moderately difficult to cover up.
Walls can be damaged in a wide variety of ways, from pin holes and cracks to large break outs.
The problem is that the hole is a good deal larger than it needs to be and there is nothing sealing the hole, so i can see sunlight clearly through the hole. Would duct seal and caulk still be the best means to close the hole? How to patch a hole with scrap drywall. Once the first coat of plaster is dry, give it a light hand sand and dust the surface clean with a rag.