| 摘要 |
An improved breather membrane for walls allowing ventilation as well as being a moisture barrier and breather membrane is provided. A multi-layer asphalt-saturated breather-type building paper which has a corrugated layer and a non-corrugated layer is capable of being positioned in a wall system beneath the exterior finish or cladding as a self venting, water repellant building envelope material. The corrugations provide vertical channels for moisture drainage and for air movement beneath the external cladding.
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