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US 5,027,572 AGranted
Moisture and vapor barrier in exterior insulation finish systems
AssigneeW. R. Grace & Co.-Conn.
InventorsDavid E. Purcell, Lawrence Shapiro
Life of this patent
Estimating the term…
Abstract
A new concept wall system is provided, wherein a moisture and vapor barrier is positioned in an enterior insulation finish system to provide thermal stability regardless of climatic variations. Specifically, a two part membrane of multiple cross-laminated layers of polyethylene film fully bonded to a layer of rubberized asphalt is placed between the substrate and insulation layers of the exterior insulation finish system.
Claims22
An exterior insulation finish system comprising the following layers in the order provided;
- a. a layer of building sheathing;
- b. water-impermeable membrane adhered to said sheathing;
- c. a layer of thermal insulation fastened through said membrane to said sheathing;
- d. a reinforcing layer embedded in a base coat of cement and polymer;
- and
- e. an outer water impermeable polymer based layer;
- said exterior insulation finish system further comprising a passageway extending from said membrane through said outer water-impermeable polymer-based layer to direct moisture out of said system.
4 more elements
An exterior insulation finish system comprising the following layers in the order provided;
- a. a layer of building sheathing;
- b. water-impermeable membrane adhered to said sheathing;
- c. a layer of thermal insulation fastened through said membrane to said sheathing;
- d. a reinforcing layer embedded in a base coat of cement and polymer;
- and
- e. an outer water-impermeable polymer-based layer;
- said exterior insulation finish system further comprising a first layer of water-impermeable membrane covering an expansion joint in said sheathing, a second layer of a water-impermeable membrane covering said first layer;
- said first and second layers being covered by said water-impermeable membrane adhered to said sheathing.
5 more elements
Dependencies are inferred from the claim text.