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f\EDAR siding is a beautiful and \-rdurable addition to any project. Yet, for best performance and highest quality appearance, you should encourage your customers to take special care that the siding is properly installed.

Cedar siding, like all wood products, loses and gains moisture as it reaches the moisture level of the air in its immediate surroundings. Uneven or rapid drying of cedar siding can cause problems such as twisting, cupping and splitting after installation.

To avoid such problems, siding should be allowed to acclimate with the surrounding air of its final site prior to installation. Siding should be stacked on evenly spaced, vertically aligned stickers, or spacers, in an area where there is good air flow through the stack. If stacked over concrete, the first stack must be elevated at least 4 inches above the concrete. If stacked on wet concrete or wet ground, placing a vapor barrier down first will stop moisture from beneath.

Air should flow through the stack for a week to 10 days for dry siding. Extend the time to 30 days or longer for unseasoned, or green siding, or if acclimating to exceptionally humid conditions.

To further protect the siding against moisture, all sides, edges and cut ends should be primed or prefinished before installation. Prefinishing can minimize objectionable lines caused when joints open due to shrinkage during dry summers. Whichever prefinish is used, it should be compatible with the final finish.

Cedar siding should be installed over a vapor permeable building paper, regardless of the sheathing used. Building paper acts as a water barrier rather than a moisture vapor barrier and is recommended to Prevent water from entering the wall cavity. Additionally, an appropriate vapor banier should be in place on the warm side of the wall insulation to reduce moisture movement from the inside.

When applying cedar siding over rigid foam sheathing, building paper should be used between the foam and the siding. If the foam or building paper gets wet before or after installation, they should be permitted to dry before the siding is applied.

Selecting the proper nail is important in ensuring the final look of your cedar siding. Stainless steel, aluminum or high-quality hot-dipPed