General Topics - Installation Instructions

Worthington Window Panels
Worthington window panels should be face mounted using galvanized fasteners and urethane adhesive. Countersink the fasteners and fill with “Bondo” or any two part plastic wood filler. Make sure to flash properly before applying siding.


Urethane Adhesive
Worthington recommends urethane adhesive only to join urethane parts. Urethane adhesive actually expands after it comes out of the tube and moves into the foam cells of the part to form the best adhesion possible. Standard construction adhesives do not do this and will not perform as wall with urethane products.

Worthington Factory Coating
Worthington urethane millwork is factory painted with a high emulsion exterior paint that requires no additional finishing upon installation.

Storage
It is important to store urethane millwork in the temperature conditions in which it is being installed. If the product is stored in a trailer and the temperature inside the trailer is hotter than the temperature outside, the product may contract after it is removed from the trailer. Remove the product 24 hours in advance of installation and allow the product to adjust to the temperature conditions in which it is being installed. This is a very important step, especially with moldings.

Flashing
Urethane millwork is installed in the same manner as wood while the parts themselves will not rot or adsorb moisture the wood behind them will. It is necessary to flash urethane parts using the same techniques that are used with wood. Caulk is a temporary solution to protect against water seepage and with expansion and contraction of the house and the part the seal will eventually crack allowing water seepage. Worthington recommends using aluminum or vinyl flashing material to provide a final solution.

Preparation
Fill fastener holes with painter putty, “Bondo” or a two-part plastic wood filler. Make sure to follow the manufacturers mixing and application instructions. For molding joints where the skin surface was sanded through, use a skim coat of “Bondo” or other two-part plastic filler to reestablish a smooth paintable surface.

Paint
Use any quality latex or oil-base paint. No primer coat is needed, as Worthington part already receive a topcoat.