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Products:
Fiberglass Casement Windows -
Installation Instructions
Features • Product Description • Thermal Performance
Available Sizes
• Vertical Section
• Horizontal Section • Mullion
details
Photo Gallery •
Installation Instructions
Step
1: Handle Carefully. Store upright, under cover. Separate windows with non-abrasive material.
Step 2: Verify size and location.
Step 3:
Prepare rough opening (See DWG 1). At the top of the window, cut and fold up exterior building paper revealing about 6” (150mm) of sheathing. Create a sloped sill with a piece of clapboard. (See DWG 2) The clapboard needs to be at least as deep as the window. Cover the clapboard with a self-adhering waterproof membrane. It must overlap the clapboard by 6” (150mm) both up each jamb and down over the building paper. Apply gussets in the bottom corners to ensure membrane is continuous.
Step 4:
Set window in rough opening. Ensure visible drainage hole covers are on the outside and the bottom of window.
Step 5:
Shim window so that it is plumb, square, and level. (See DWG 3)
There must be shims under bottom right and bottom left corners of all windows, as well as under all vertical mullions. Add other shims as necessary to support the window, (typically ever 24” (600mm)). Ensure that the window is not carrying any structural loads. Adjust shims to ensure a uniform clearance/reveal between sash and frame.
Step 6:
Secure installation flange to the building with screws. (See DWG 4) There must be screws within 4” (100mm) of each corner and within 4” (100mm) of each mullion – in both directions. That means two per corner and two per mullion. Additionally there must also be a screw every 24” (600mm). Verify that the window opens and closes smoothly. If not, reconfirm step 5, removing and reinstalling screws as required. If that doesn’t work, contact your dealer before preceding.
Step 7:
Join the flange to the rest of the building to maintain a continuous drainage plane.
Cover the installation flanges with a self-adhering waterproof membrane.
Step 8:
Install a drip edge/cap over the window. (See DWG 4) It must extend at least 3” (75mm) upwards against the sheathing. It must also extend both out past and down over the outer face of the window by at least ¼” (6mm). Additionally, the drip edge must extend past each end of the window by ¼” (6mm). Cover the vertical leg of the drip edge to the wall with a self-adhering waterproof membrane that completely overlaps the jamb membranes. Unfold the building paper down over the taped edge. A properly installed drip edge is required over the top of each window.
Step 9:
Join the window to the rest of the building to maintain a continuous air barrier. (see DWG 3) Caulk the interior edge of the sill to the self-adhering waterproof membrane below it. (See DWG 2) along the jambs and head insulate between the rough opening and the window. Careful installers do this by using low expansion urethane foam. Be sure to carefully follow all the directions and warnings from the foam supplier. Be careful not to distort the frame by over insulating.
Step 10:
If you have any questions please call your dealer or Thermotech Windows at 888.930.9445 or 613.225.1101.
Warning: screens are intended to keep insects out. They are not designed to
restrain children.
Considerations:
Energy efficient windows seal air and moisture inside a building. Excess moisture produced during daily activities may show up as condensation on the room side of the windows. Every effort should be made to eliminate excessive humidity in order to reduce the amount of condensation.
Casement Windows
Features • Product Description • Thermal Performance
Available Sizes
• Vertical Section
• Horizontal Section • Mullion
details
Photo Gallery •
Installation Instructions
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