Sealent

[Empty88]

Hi.

 

Should the gap between bottom of window to stone sill be sealed?

 

New windows installed and bottom one's are all the same as pic. 

 

Thanks 

[markc]

Yes and no, yes you need the joint to be weather / wind proof but that is better done further back. My window guy never mastics the underside of cills unless there is a big or uneven gap. They bed the cill into mastic (you can’t do that at the sides or top) so no visible sealant needed.

[Gone West]

Some UPVC windows drain along the bottom edge of the window, so if it is that sort of window, then no, it shouldn't be sealed.