b'When the opening is properly flashed, moisture will makeits way down the sides of the new window towards the sill,where the sill configuration should allow this moisture to EXTERIOR SHIMSexit. SEALDRIP CAPThe Sequence is Important.The process is called shingling, and it describes the overlapping of each flashing layer when creating a water-tight window and door installation.Method A: It is advisable to staple building paperover the edges of the rough opening as shown. Putthe bottom strip on first, and the sides next. The top INTERIORstrip is mounted after the window is installed and FASTENING SEALoverlaps the top nailing flange.This will direct wateraway from the window opening.INSULATIONPLUMB/LEVELWRB Interior TrimThough there are many ways to trim-out the interiorof the new Vinyl Window, the two most popular waysare Wood Jamb/Trim, & Casing;and Full SheetrockReturn on all 4 sides. Even with the sheetrockreturn, a wood stool is recommended to facilitatecleaning, and minimize marks.Figure 3 details typical, conventional wood trim -including wood jambs, wood stool, and clamshell orSheathing colonial casing and apron. Using standard 3/4 or5/4 wood stock, butt the stool and jamb to the win-Once the bottom and side strips of WRBare mount- dow, and then the sheetrock can be butted to theed, apply bedding sealant around the inside of the jamb and stool and covered as shown.nailing fin. Figure 4 details a typical sheetrock return. Be carefulPlace the window in the opening with the flanges to trim the sheetrock square as it will butt againsttight against the opening.Position the window 1/8 the window. If possible use the outside, wrapped,from the top, and 3/8 from the bottom, and center edges of the sheet to keep the joint neat. Using metalthe window side to side.This will allow the interior corner bead, cover the wall and jamb/sill joints andtrim to be installed without impeding the operation of spackle as necessary.the window. It is also desirable to install a 3/4 wood stool overNail across the top first (in every other slot), making the sheetrock sill and use casing for an apron below.sure the window-top is level.This procedure will ineffect hang the window and assure that it is bothlevel and plumb.Re-check the level and plumb, andnail the sides (in every other slot) from the top down.Do not nail the flange tight. Like siding, nailingshould be just tight enough to hold the window, but not impede movement of the structure under- FIG 3 WOOD TRIM FIG 4 SHEETROCK TRIMneath during environmentally caused expansion and contraction. Staple the top strip of building paper in place if needed.When siding and/or trim is installed, it should be fitted over the nailing flange using the proper drip-caps, J-channels, or other flashing materials.Window Fitters Guide to Window Installation97 2020 AWDI, LLC Do not reproduce without permission'