I have a conundrum here:-
I have filled and treated the sills, but for some reason the paint keeps
splitting after a few months - I suspect due to differences in materials (I
think I did the paint job properly).
So, how difficult is it to replace the sills - I'm reasonably competent with
a big hammer #8-)
Depends on which part of the sill has rotted. If it's just the front
section, you can usually chop that out neatly back to good timber, using a
wood chisel. If it is the rear section as well, then the whole sill will
need replacing. Not a job for the faint hearted. Sometimes it is easier to
chip back all the rot and then fit some shuttering across. You then fill
this with a sharpsand/cement mix. When it has hone off you can paint it to
match and it normally lasts longer than the timber.
It would appear to tbe the front bits only - I'm just trying to work exactly
how hard they would be to hoik out and replace as by the time I've filled /
made good, the time and expense is probably more than a bit of sill wood!
Sliding sash window?
I would def go for repair rather than replacement if at all possible. The side
pieces will be tied (cut) into the sill profile so replacement could be a bit
problematic. If you have trouble with the repair shrinking away from the
existing wood then you could use magic silicone sealant to seal any gaps
although frame sealant will be more paintable. If in an exposed location
you could fabricate a flashing with fibreglass resin & tissue; make sure to
excise all the rot and moisture before sealing over with this.
Nope, anything ready made will fit poorly, leak and result in more problems
further down the line. The fibreglass resin approach is quick, tidy and can
easily be made to fit the profile of the sill and lap a little up the uprights,
making a good seal; available from all good motor factors . . .
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