Stucco Wall Penetration and Weep Screed Leak Detection Test

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  1. Thank you for this article and video. It confirmed my thoughts about our water intrusion issue this last year. I do have a question. Is the weep screed visible to the eye when it is exposed properly. I live in a 46 unit townhouse development and I see the depth of where the weep screeds are but I don’t see the bottom of them. I’m wondering if they’re all covered up. Mine is covered up with dirt and rocks all the way up to the building stucco. My silll plate was like sawdust and the 2 x 4 structural members were not even connected at the corner of my house. Everyone tried to tell me that water would not come through the sill plate into the house, that it was from a roof leak. I have been battling with the HOA to remove the dirt and rocks from the side of my house.

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      Hello, you should absolutely be able to see the weep screed. At the bottom of the screed are holes which drains the stucco wall. If the weep screed is under soil it will deteriorate and can absolutely allow water to enter into the building through the sill plate. In the images for this post, you can see the sill plate completely deteriorated because the weep screed was under the soil. Furthermore, when we isolated the weep screed it leaks in less than 30 seconds into the building. The result was mold and thousands of dollars in structural repair. I suggest researching the building code and taking that to the HOA.
      Like this… for example.”
      R703.6.2.1 Weep screeds. A minimum 0.019-inch (No. 26 galvanized sheet gage), corrosion-resistant weep screed, or plastic weep screed, with a minimum vertical attachment flange of 3-1/2 inches (89 mm) shall be provided at or below the foundation plate line on exterior stud walls in accordance with ASTM C 1063-03. The weep screed shall be placed a minimum of 4 inches (102 mm) above the earth or 2 inches (51 mm) above paved areas and shall be of a type that will allow trapped water to drain to the exterior of the building”.

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      Great question. I’m guessing it has to do with the soil’s ability to NOT be constant and therefore subjecting the building to the “potential” that the soil may raise to meet the screed at some point. Cement is constant.

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