rotten window sills

2 Aug 2008
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United Kingdom
I've got some rotten window sills that need to be replaced - not repaired, done that, it never works successfully. They're wooden casement windows about 25 years old on friction hinges so can be easily removed. How far does the sill extend under the window frame; is it attached to the inside sill; How is this sill fixed; how do you get it out, and how do you attach the new sill to the old window frame?

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the bottom is usually 1 piece.
you will have to chop back flush with the rest of the frame then glue and screw a new cill on, then plug the holes

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