Hinterfeuchtung
English translation: moisture intrusion / moisture penetrating behind ...
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| 11:51 Jul 31, 2001 |
| German to English translations [Non-PRO] Tech/Engineering | ||||
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|  Selected response from: Ulrike Lieder (X) Local time: 08:19 | |||
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| na +1 | moisture penetrating behind |
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| na | moisture intrusion / moisture penetrating behind ... |
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Answers
36 mins
moisture intrusion / moisture penetrating behind ... Explanation: The most frequently used term seems to be moisture intrusion, but you'll still have to specify that the moisture is getting behind a surface. See some examples: Moisture can cause peeling paint on the lower part of stucco or other masonry walls. Water entering the ground can be absorbed into masonry, then migrate upward and, warmed by the sun, create water vapor pressure on the back side of the paint film. This problem is often accompanied by a white crystalline deposit called efflorescence on the paint and a general decomposition of the masonry itself. Applying a waterproofing compound to the surface of the paint will NOT help. Water must be stopped before it enters the masonry below ground. Excavating and coating below grade surfaces with a coal tar or asphaltic coating will help. Improving the drainage of the water away from the structure will also help. This problem of water wicking also occurs with wood in contact with the ground or areas of high moisture concentration (piled snow, siding adjacent to rain water, down spouts, etc.), causing the grain to swell. This in turn causes the paint to peel from the surface. Two of the major causes of painting failure on exterior wood surfaces are either moisture passing through the substrate from the interior, or exterior sources of moisture getting behind the painting film. These may result from faulty flashing, lack of adequate ventilation in the house itself (i.e. ridge vents, soffit vents, attic vents), allowing trapped moisture to evaporate, improper or inadequate caulking, or a porous or cracked painting film, among others. www.dehavenconstruction.com/paint/INDEX6.HTM It is a demonstration of proper construction techniques to reduce moisture intrusion, behind-the-wall building concepts, and high performance products and systems that offer resource efficiency and long term reliability. www.housingzone.com/projects/walls/index.asp These were essentially designed assuming that no moisture could get behind the siding. In the last few years, substantive problems with the application of this cladding system have come to light, resulting in class action litigation in some instances. A study (included) by the National Association of Home Builders (NAHB) has investigated and documented some of the problems with this product. The problems appear to derive from the fact that although the base coat is substantially waterproof, inattention to detail when sealing penetrations (windows, doors, railings, etc.) or failure to properly "backwrap" the mesh behind the foam board or use "kick-out" flashing where warranted allows moisture intrusion behind the insulation board and once in, due to the impermeability of the base coat, the water cannot be removed by evaporation or drainage, and decay of the wall sheathing and/or framing results. Due to the failures of the older and more common "barrier" EIFS systems, a second generation of EIFS was developed that assume some moisture infiltration would occur, and made provisions for any moisture that accumulates behind the EIFS to be discharged out the bottom. www.halcyon.com/chi/eifs_general_comments.htm --Owners of hardcoat stucco homes who thought they were safe from the moisture problems plaguing synthetic, or external insulation and finishing systems (EIFS) homes may be surprised to learn moisture also may be hiding behind their walls. And, because hardcoat stucco is more difficult to penetrate, moisture problems may be harder to detect because testing the entire surface of a hardcoat home is near impossible. "Hardcoat stucco homes are almost as susceptible to moisture intrusion as synthetic or EIFS homes," says Chris Burton, president of Stucco Pro, a Charlotte-based professional moisture testing company. "You essentially find the same reasons for the moisture intrusion; missing flashings, moisture entering at window locations or at any breach in the stucco surface, such as vents, chimneys, and other areas such as these." www.stucco-pro.com/pages/pr2.htm Moisture penetrating behind stucco and through the underlying building paper and flashings may ... www.buildinganalysts.com/newsletter/spring99.html HTH. |
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5 hrs peer agreement (net): +1
moisture penetrating behind Explanation: Agree with Ulrike. But you might also want to resort to below link from Purdue to get some insight on the topic: Good Luck! Reference: http://www.agcom.purdue.edu/~agcom/Pubs/NCR/NCR-134.html |
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