Two choices that I see:

Insert backer rod to control the depth of caulk and prevent 3
sided bond. Use a good grade of caulk. I would use polyurethane,
NOT silicone. Use good painter's latex if you plan to paint.

Use some trim. Choices, at a real lumber yard: lattice, 1/4
round, base shoe, door stop. If the trim has a shape, it will
need to be coped or mitered. Lattice trim could be square cut.
This will need paint. There are prefinished non-wood trims that
are quite easy to work and install.

--
______________________________
Keep the whole world singing . . . .
DanG (remove the sevens)




"Steve" wrote in message
...
Hello. The windows in my Mom's house were just replaced.
Apparently they had
to move the windows about 1/4" forward from where the previous
windows were
(according to the person who installed it, this was necessary to
get a good
seal so air couldn't get it - apparently the previous windows
had not been
installed correctly and didn't have a good seal) so on each
window there's
now about 0.25" space on the window sill (between the sill and
the window).

I asked the window person what to do about the void. He said to
fill it with
a piece of wood so I'm attempting to do that. The other
alternative I guess
is to use wood putty or bondo to fill in the void.

I measured the void on one window to see what size of wood I
would need.
Upon doing so, I found out the distance between the window and
edge of the
sill (the depth measurement) varies significantly as you go from
one end of
the window to the other so that one piece of wood with the same
cross-sectional area would not fit well.

Solving this is a head scratcher for me. The space seems too big
to fill it
all with wood putty or bondo (the size of the void on each
window is roughly
35" wide, 1" high, and 0.25" deep so it would be a lot of wood
putty or
bondo).

I'm guessing the thing to do is fill each void with several
pieces of wood,
each piece having a different depth (since the depth of the void
changes as
you go from one end of the window to the other) and glue them in
somehow (or
nail them in with small nails and top it off with wood putty)
and then fill
around those pieces of wood with wood putty or bondo. And
somehow make all
this look like a continuation of the existing window sill after
the sill and
void are painted.

I'd appreciate any ideas on how to solve this problem. I'd also
appreciate
responses from people who have used a lot of wood putty (or
bondo or
whatever) to fill a large void like what I have and how it
worked out.

Thanks!

Steve