Dictionary of Moisture Protection & Restoration

MORE JOINT DETAILS

Metal-frame joint Distance A should equal distance B for equal expansion and movement.

Sealant bead

¼ round backer rod

I cannot emphasize enough the importance of transition joints. You can have the best envelope system, but if the transition joints fail, the entire system will fail. I often find failures in residential wood frame structures where the building paper under the stucco has been compromised. The building paper is replaced with an elastomeric coating on the stucco, but the transition joints are ignored. The elastomeric system is blamed for the water intrusion, but in fact the joints are the culprits. Proper attention to joints is essential for a successful waterproofing scope. END CHAPTER III

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