Revisions log for Answer #2518
This is the answer to the question Do the interior window sills need to be additionally sealed?
Revision 1
2022‑09‑30 05:09
Active REV1
Initial text
The window sill does not have to be airtight. However, if there is a small gap through which water can leak, silicone would be the right choice. White or clear silicone does not matter.
Tightness is created when the window is professionally installed. The window sill sits in front of it and has no effect on the blower door test.