John W wrote:
I have several partially rotted sills and sill noses on my windows. Does the
wood hardner and wood fillers on the market work to harden the soft spots
and fill in the real rotted portions. Any hints on how to use them before I
get going. Any suggestions would be appreciated. Thanks

John

Greetings,

If your windows are rotting outside just cap them with metal. Who
cares what happens under the metal where no one can see?

When Bondo costs too much because of the volume of wood to repair I
have been able to screw down into the good wood and leave the screws
heads sticking way out into the large chunk of missing wood. Then I
use stiff Type M masonry mortar (you don't want it to shrink) to fill
in the rotted area and keep it moist for about 72 hours (tape an empty
cheese-puf bag over it or something). The rotted area must be a large
chunk without thin spots. If the shape of the stricken area is not a
large chunk use a minimum of a 1.5" hole saw to make a large missing
chunk without any "thin" areas. This is the cheapest way per cubic
foot that actually works. If your budget is slightly more but still
way less than bondo then you might mix your mortar with some latex
admixture. If you paint your finished product no one will be able to
tell.

Hope this helps,
William