Hi there, first time installer.
'm putting in vinyl replacement windows and I have 2 (for now) install questions:
(1) the space between my inside stop and blind (outside) stop is about 1/8" to 1/4" deeper than the replacement unit.
What is the best way to make up this space-
(a) install replacement up against blind stop, leaving 1/8" to 1/4" gap on the inside and remount inside stops against the the unit, closing the gap. The stool (horizontal ledge piece at bottom of window) would still not be flush against the replacement unit however, so there'd be a gap on the bottom. i could stuff in backer rod and caulk it i guess.
(b) put 1/4" thick trim piece between unit and blind stop, essentially shimming the window to fill in the space so there is no gap on the inside.
(c) something else?
(2) the sides of the replacement units are channel shaped, i.e. the front (inside) and back (outside) faces of the units are about 1/8" wider than the body of the units. When I shim, should the shim be against the body of the unit or the edges of the faces? what should i fill the "channel" with?
all suggestions appreicated. thanks!