Housewrap with drainage channels
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Issued Date -
Oct 23, 2003
app pub date -
Mar 11, 2003
filing date -
Apr 15, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A housewrap material for controlling moisture in the walls of a building includes a moisture vapor permeable, water impermeable sheet material having opposite surfaces with a plurality of drainage channels formed in the sheet material for directing the flow of liquid and for imparting to the sheet material a three-dimensional configuration. The sheet material has a crush resistance under a load of about 2.65 psi of at least 50%. In one embodiment, the integral drainage channels are defined by a plurality of generally parallel extending peaks and valleys that allow water to be drained from the wall. The composite nonwoven material has sufficient strength and stiffness to impart significant crush resistance to the composite, so that the integral drainage channels will not be collapsed or destroyed by the subsequent application of siding, stucco, paneling or the like to the building. Preferably, the composite sheet material has a crush resistance of at least 50% when subjected to a pressure of about 2.65 psi. This is particularly advantageous when the composite sheet material is used in conjunction with the application of stucco, although the advantages of the present invention are equally applicable when used in conjunction with a rigid exterior siding material.
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