wrote in message
oups.com...


Replace staff bead with about 3mm clearance for the whole run of the
bottom sash.

That seems a very large clearance.

If you put a new catch on make sure it pulls together
firmly to stop rattling. Can be useful to strip off all meeting
surfaces if paint is lumpy and repaint to make good fit esp meeting
rail. A tightish catch will cause them to grip the staff bead and not
rattle.


Don't use those 'snail shell' type catches
Why not?
but go for old fashioned lever.

Toby