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The marvin windows have a 1/4″ piece of wood that projects +- 1″ up past the bottom of the lower sash. The window frame does not have any provision for a sill (I trimed out anderson windows in my last house and there was a groove or dado for the sills). I would like the sill to be flush with the opening and not down at the window frame (this will make it look like the other old double hung windows in the house). Any advice would be great.
Thanks
RD
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The wood on my Marvin's is a little thicker than 1/4" but in any event we notched the sill so that it goes on top of that wood piece leaving a similar gap (1/8") to the sash. This requires the sill to be notched twice and if you are looking for perfection it may take a couple of tries. We ripped scrap to pad the jambs up to the height of the 1/4" piece so that we had something to fasten the sill. E-mail me if you have any questions.
*Extra little dado based on your description.and it's been a long time for me with Marvin double hungs but I've got a shadow of a memory that this bit of wood is a filler that can be easily pryed up and replaced wioth another. Check it out carefully with a flexible putty knife.
*It's been a while for me too, but I remember on my first job we trim screwed the sills to that thin piece. I was never happy with the setup, so on the next and following jobs I think we ripped the narrow piece off and replaced it with the new sill. We added blocking directly beneath the sill for solid bearing. I never really liked their setup because you can't actually attach the sill directly to their subsill.
*Thanks for the info. I guess I will be removing the 1/4" piece.