Q: I have a mountain home at a 4,200-foot elevation. On the house's southern exposure, there are two bay windows approximately 35 feet tall with individual glass panes approximately 2x8 feet. Do you have any suggestions regarding the right caulking material?

— Willis, Highlands, NC

A: Tom Silva replies: A silicone glazing compound is best for glass-to-glass application. If there are wood sashes or muntins, the silicone won't stick if any moisture enters the wood. The silicone seal will break and you'll have to remove and replace the broken silicone. You can't simply caulk over it. If the wood frame is metal, silicone will work fine. But remember: you can't paint over silicone, so you should buy it in the color that you like.
Ask TOH users about Windows

Contribute to This Story Below