Philadelphia-Camden-Wilmington, PA-NJ-DE-MD

Virtua Replacement Hospital - West Bedtower
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Virtua Replacement Hospital - West Bedtower

New hospital building using conventional CMU interior wall construction, exterior... More

Saint Joseph's University Villiger Hall
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Saint Joseph's University Villiger Hall

St. Joseph's University, located in Philadelphia, has grown rapidly since... More

Lenfest Hall
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Lenfest Hall

The Curtis Institute of Music's Lenfest Hall provides state-of-the-art facilities... More

David L. Kurtz Center for the Performing Arts
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David L. Kurtz Center for the Performing Arts

Designed to an intimate scale, the theater in the David L. Kurtz Center for the... More

PPL Park
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PPL Park

2011 Masonry Construction Project of the Year Awards Entry More

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VOCATIONAL SCHOOL LIST

Alphabetical by State More

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SCHOOL LIST
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Reason for stains

We built a large wood frame residence with a brick veneer just outside of Philadelphia. The exterior wall is brick veneer with generally less than a 1-inch cavity, building wrap, OSB sheathing, 2 x 4 studs with batt insulation, 6-mil poly vapor barrier, and an interior drywall.One year after completion of the house, the owner noted that the wood base around the first floor was warped in many locations. When we removed the warped base, we noticed considerable mold growth on the surface of the gypsum wallboard. We opened up the wall in an attempt to determine the source of this moisture.We expected to find stains on the OSB sheathing. Instead, we discovered only stains on the top surface of the 2 x 4 plate and the bottom of the studs. Based on the pattern of moisture staining, it appeared water was flowing off the 6-mil poly vapor barrier.The problem is primarily occurring on the first floor, but there are also some areas on the second level. There are no reported leaks in the basement or on the ceiling in areas below the staining on the second floor. In all cases, the problem is occurring where the exterior surface of the wall is brick masonry.The problem is generally much less severe below windows than it is in blank areas of the wall. The windows are vinyl with integral flanges that were integrated with the building wrap. It does not appear that the windows are a contributor.The worst damage occurred on the half of the south elevation where the lawn extends to the face of the building. The other half of the south elevation, where there is a patio up to the edge of the house, does not seem to have the same magnitude of problems. The concrete foundation rises approximately 4-inches above the top of the grass, so groundwater should not be a problem.What is causing this problem? More

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Showcase: Square Dance
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Case Study of a Hard Metric Project
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