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| Weather barrier
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The outer most assembly of the building envelope, used to protect the inner structure and insulation from the effects of wind and rain. Materials typically used are siding, building paper and flashing. |
| Weather stripping
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Specially designed strips, seals and gaskets installed around doors and windows to limit air leakage. |
| Weatherhead
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Rain-tight conduit fitting over the service entrance head, which is located where overhead electrical power enters a building. |
| Weathering
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The effect of exposure to weather on paint films,. |
| Weatherization
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Caulking and weatherstripping to reduce air infiltration and exfiltration into/out of a building. |
| Weatherproof electrical boxes
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Electrical boxes which can operate even when directly exposed to the weather. A gasket under the cover plate seals against the possibility of moisture entering, with other entrances being threaded through connectors. |
| Weatherproof switch
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Electrical switch which has a cover to protect it from moisture when it is used outside. |
| Weatherstripping
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A material used to seal gaps around windows and exterior doors. |
| Web
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(1) The thin central vertical portion of an I-beam, which connects the top and bottom sections which are the flanges. (2) The cross section wall that connects the face shells of a hollow concrete masonry wall. |
| Web clamp
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Belt, of woven fabric, with a tightening mechanism, which maintains tension on the belt when it is placed around an object to hold it still. |
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