초록 ▼

A construction membrane that resists liquid and air penetration, is moisture vapor permeable, and has integral drainage channels is provided. An exterior wall construction incorporating such barrier sheet material is also provided. The wall construction may be faced with stucco, siding, brick or sto

A construction membrane that resists liquid and air penetration, is moisture vapor permeable, and has integral drainage channels is provided. An exterior wall construction incorporating such barrier sheet material is also provided. The wall construction may be faced with stucco, siding, brick or stone. A method for bonding and texturing the construction membrane is also provided.

대표청구항 ▼

1. A construction membrane comprising a unitary, nonwoven, spunbonded, barrier sheet material consisting essentially of synthetic plexifilamentary fibers, said sheet material having a basis weight of less than 600 g/m2, a hydrostatic head of greater than 12 cm, a Gurley Hill porosity of greater than

1. A construction membrane comprising a unitary, nonwoven, spunbonded, barrier sheet material consisting essentially of synthetic plexifilamentary fibers, said sheet material having a basis weight of less than 600 g/m2, a hydrostatic head of greater than 12 cm, a Gurley Hill porosity of greater than 10 seconds, a moisture vapor transmission rate, measured by the LYSSY method, of at least 25 g/m2/day,said barrier sheet material having a first side thereof, said first side thereof being textured with protrusions in a random polyhedral pattern, said protrusions having a height in the range of 0.25 mm to 1.0 mm, said protrusions defining channels oriented in multiple directions for providing paths by which a liquid against the first side of the sheet can drain.