I see that Yale now do a Night Latch (XBS1) to BS3621 http://www.screwfix.com/app/sfd/cat/pro.jsp?cId=100641&ts=93735&id=54648
When they state 'Suitable for glass-panelled doors' do they mean just timber-framed ones or are they suitable for uPVC doors as well (as additional security to a multipoint lock) ?
Looking at it I suspect they won't work on uPVC doors as the night latch mounting requires the door to sit flush in the frame whereas uPVC doors overlap the frame. Is that correct ?
When they state 'Suitable for glass-panelled doors' do they mean just timber-framed ones or are they suitable for uPVC doors as well (as additional security to a multipoint lock) ?
Looking at it I suspect they won't work on uPVC doors as the night latch mounting requires the door to sit flush in the frame whereas uPVC doors overlap the frame. Is that correct ?
