Do I need to caulk where the vinyl siding meets the edge of the windows


To help prevent leaks, I was advised by a contractor that I need to caulk where my vinyl siding meets the edges of my windows. Some research of my own reveals quite a bit of debate over this, a few saying that the caulking will wear out fast because of the expansion/contraction of the siding. Others say that, if the vinyl is installed properly, caulking is a superfluous measure of protection. I am wondering what SE has to say on the matter.

Best Answer

Agreed with the research you found. Most vinyl siding, if installed correctly, will not require caulk at the sides of the windows and doors. Often there is actually a separate vinyl piece installed first at the side of the window that the ends of the siding tuck into. You are supposed to leave a gap at the end of the siding pieces to permit expansion and contraction. This same siding movement is the reason that the siding comes with slotted nail holes.

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(from the web site)