Peaslee Cottage Window Apron
When I prepared the third floor windows of my house for storm windows, all of the window sills, and jambs had to be restored beforehand, so that the storm windows could be properly set and sealed. The old apron was just a 2 x 4 nailed to keep the rotted sub sill from falling out. I repaired it (see other post) so that I could fabricate a new decorative apron that more closely matched others in the neighborhood, and from other period homes.