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APA - The Engineered Wood Association

The Leading Resource for Information About Engineered Wood Products™


Drip Alert: Industry research has determined that bulk water intrusion from the exterior is responsible for a majority of the moisture related problems. Poorly sealed windows, doors, and siding are some of the major culprits. Just one crack in the caulk necessitates replacing all the caulk.

APA's Free From Mold ten point protection plan □ Follow these simple steps to replace caulk around a window or door:

□ Remove all old caulk using chemical caulk remover, putty knife, or other blunt-end, thin tool. Never apply fresh caulk over older caulk.

□ Clean the surface of the frames or door frame to be caulked with rubbing alcohol.

□ Place a foam backer rod in seams more than 1/2 in. wide or 1/4 in. deep.

□ Using a caulk gun held at 45 degrees, push the bead ahead of the nozzle. Don’t fill weep holes at the base of the window frame.

□ Use a spoon dipped in soapy water to apply a smooth finish before the caulk cures.

□ Check the weather-stripping along doors. Detrimental weather conditions can cause weather-stripping to disintegrate, leaving gaps for air and moisture to enter.

□ Inspect and recaulk seams in siding. If you are between paint jobs, clear caulks are available that will blend with the house color.

□ Inspect stucco and brick surfaces for cracked mortar. You can either call in a professional or obtain patch kits from your hardware store.

□ Keep a minimum 6 in. clearance between the siding and the ground.

□ Using a small mirror, inspect bottom edges of siding close to the ground. Prime and paint any unfinished siding drip edges.

Because APA has no control over quality of workmanship or the conditions under which engineered wood products are used, it cannot accept responsibility of product performance or designs as actually constructed. Consult your local jurisdiction or design professional to assure compliance with code, construction, and performance requirements.