ATTENTION! Read and understand all installation instructions before installing this product.


Introduction
If you do not understand these instructions, or cannot perform the installation as specified in these instructions, do not install this product. Have the product installed by a qualified professional capable of following the instructions, or contact your Sun Windows Dealer or Representative to obtain further information. You may contact Sun Windows Customer Service at (270) 684-0691, Monday through Friday, 8:00 a.m. to 4:30 p.m. central time. Failure to follow these installation instructions will void the Sun Windows Warranty and may result in product malfunction or failure. You may also refer to ASTM E 2112 Standard Practice for the Installation of Exterior Windows, Doors and Skylights for additional installation guidelines.

ATTENTION! These Installation Instructions were developed for use with typical wood frame wall construction in a wall system designed to manage water. If your application is different, you may require additional installation instructions, methods and materials. Please contact Sun Windows if you have any special installation applications. It may be necessary to develop installation instructions specific to your needs. It is the responsibility of the consumer, architect or construction professional to verify the installation method for your application.

ATTENTION! Proper management of water and moisture is an essential part of any structure. All structures must have a functional, engineered drainage system as part of its exterior finished wall system. Sun Windows, Inc. cannot control or be responsible for water/moisture management beyond the product itself. All products manufactured by Sun Windows must be properly installed as described per these installation instructions. All products manufactured by Sun Windows must be properly flashed and a complete vapor barrier applied to seal the product opening. Proper installation of drainage systems, flashing, water and vapor barriers are the sole responsibility of the owner or their agents.

Step 1: Prepare the Rough Opening

ATTENTION! Building codes have minimum egress size requirements for certain window applications and locations. It is the responsibility of the building designer or builder to verify and meet these code requirements.

ATTENTION! Radius and Special Shape units. Units with curved members or units that are special geometric shapes require custom framing to conform to the shape of the unit. The rough opening should be prepared for the over-all width and height of the unit. Additional framing support should be added once the product has been received and precise dimensions can be determined. Add framing members that provide support to all sides of the unit as well as the exterior wall sheathing.

a) Verify rough opening size. The rough opening should provide approximately 1/4" clearance between the sides and top of the product and the framing.
b) Verify that rough opening sill (bottom) is level. The rough opening sill must be level as the product sits on this when installed.
c) Verify that sides are square and plumb. Rough opening sides that are not square and plumb can prevent the product from being install correctly.
d) Check the exterior sheathing surface. The exterior sheathing surface should be smooth and free from any uneven areas, raised nail heads, protrusions, or any obstruction that could keep the product nailing fin from seating evenly around the entire perimeter of the opening.

ATTENTION! Correct any problems with the rough opening before proceeding.

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Step 2: Preparing a Weather Resistive Barrier

Most new homes use a weather resistive barrier to reduce air and water vapor penetration through the wall system. The following instructions provide the correct method for integrating a weather resistive barrier with windows.

Even if a weather resistive barrier is not used, follow all the steps that incorporate flashing tape.

a) Cut weather resistive barrier. Find the edges of the window opening and mark a vertical center line at the middle of the opening. Cut a line diagonally from each corner to the vertical center line. Finally, cut the vertical center line between the top and bottom diagonal cut meeting points. (see illustration).

b) Fold weather resistive barrier into the sides and sill. Fold side and bottom flaps into the opening and staple in place.

c) Fold top weather resistive barrier. Fold the top flap outward and up and temporarily tape out of the way. This will be used in Step 5 b).

Cut tabs for folding	1" Overlap to form dam

d) Apply sill flashing tape. Cut a piece of flashing tape 12” longer than the width of the opening. Apply to the bottom of the sill as shown. The flashing tape should overhang to the exterior at least 1”. The flashing tape should also extend up each side approximately 6”.
Note: Flashing tape is available in two types, one for straight lengths, and the other which can be flexed to conform to curves.

e) Cut tabs in the sill flashing tape and fold. Use flexible type flashing tape which can be conformed to bend into the corners or, using straight flashing tape, cut a 1” wide tab at each corner. The tab should be centered on the corner notch. Fold the tape to the exterior and press it firmly into place.

f) Apply sill dam. Cut a second piece of flashing tape the same length as the one used in Step 2d. This will function as a dam against water flowing to the inside if it somehow reaches the sill. Apply to the sill overlapping the first piece 1”, with the remainder of the flashing tape extending to the inside. Trim excess at the interior edge.

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