Union Jubilee Clutch.

[Nick]

Straight grained knot free kiln dried is the best to use, also when designing/making them you need to give a thought to draught proofing/driving rain syndrome, you can use the DIY stick on stuff or cut grooves and use the proper gastkets.

Agree entirely - I'm making some replacement casements at the moment using sash cutters from Wealden Tools (http://www.wealdentool.com/acatalog/Door...ow_53.html) who are just down the road from me - very helpful people. Note they sell the cutters to use proper weatherseals too. Also, they do ovolo & scribe matched pairs for the joints.

One thing I would say is that if you are considering making your own windows using a router, you are in 1/2" (or a spindle moulder) territory and MUST use a router table to get anything like decent results...

Wealden Tool's "Hints & Tips" section is a goldmine of useful router-related information http://www.wealdentool.eu/hints_and_tips.html