Frequently Asked Questions

Check whether the secondary frame can be set to clear. If not can a sub frame detail provide a deeper cavity or should the window furniture be changed?

Check whether handles or catches will be accessible. This is particularly relevant to sash windows treated with a matching secondary vertical sliding window since stop positions on the secondary balances will limit access to the external meeting rail. If these are fitted with a Chubb dual screw, check that there is sufficient access to insert the key.