b"Step 5: Step 6:Accommodate It is important todrainage from the install a drip capsill. Install a Sill along the top of thePan with a back header exterior trimdam overlapping as shown. the jamb flashing - If J-Channel isbefore installing needed instead,new trim to form install it along top,the Blind Stop. and jamb sides.If youre not usinga pre-formed sill Make sure the toppan, you canlays over the jambcreate the effect by pieces and that theinstalling a 1 x 2 sill piece fitsto create a back- between the jambdam before apply- pieces for propering the flashing. drainage. Step 7: Step 8:Cut new exterior Place a bead oftrim wider than the caulk on all 4 sidesold trim so that it of the inside surfaceprojects into the of the exterior trimopening 3/8 on 3 that extends intosides. the opening. Use of cellular uPVC Leave two 1 inchtrim boards for gaps along sill toweatherabilityallow drainage. is highly recommended. Confirm the newtrim projects 3/8 to the interior on three sides - creatingan effective blind-stop for the pocketinstall. The Contractor's Guide to installing Vinyl Windows462020 AWDI, LLC Do not reproduce without permission"