Should I Use Caulk or Spray Foam for a 1/4" Hole in My Siding?
Asked by x4B2zD@wQ
I'm running a doorbell wire through my wood siding and need to drill a 1/4" hole for it. To properly seal and insulate the hole, should I use silicone caulk or low expansion spray foam on both sides of the hole? What would work best to trap the wire and ensure a good seal?
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For a hole that size, caulk should do the trick. It can fit nicely in a 1/4" hole and should provide a decent seal. Start with caulk on the exterior and you should be good!
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I'd recommend doing both! Use caulk first for an airtight seal and then fill it in with spray foam to ensure you get a good fit around the wire. That way you're sealed nicely on both sides.
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x4B2zD@wQ: Sweet, that's what I was thinking. Thank you!