Multi-functional exterior structural foam sheathing panel
AssigneeWeyerhaeuser Company
InventorAlkiviadis G. Dimakis
Life of this patent
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Abstract
An insulating sheathing panel has an insulating core, such as foam, sandwiched between PMDI impregnated cover sheets. The resulting panels offer structural reinforcement as well as insulating qualities to a building framework.
Claims33
A sheathing panel comprising:
- a core sheet of a manufactured cellular material having first and second major opposed surfaces;
- first and second cover sheets secured to the respective first and second major opposed surfaces with the core sheet therebetween, the first and second cover sheets each comprising at least one sheet of cellulosic material impregnated with polyisocyanate within a range of about 8% to 20% by weight of polyisocyanate to cellulosic material with the polyisocyanate being heat cured.
A conventional building stud frame having corners with plural sheathing panels mounted at least to a corner of the building stud frame without other reinforcing bracing at such corner, the panels each comprising a core sheet of a manufactured cellular foam material having first and second major opposed surfaces, the core sheet having a thickness of from about 1/8 to 4 inches and a density in the range of from about one to about four pounds per cubic foot, first and second cover sheets at least one of which includes polyisocyanate in the range of about 8 percent to 20 percent by weight of polyisocyanate to cellulosic material, the first and second cover sheets being secured to the respective first and second major opposed surfaces with the core sheet therebetween.
A sheathing panel comprising:
- a core sheet of a manufactured cellular foam material having first and second major opposed surfaces, a thickness of from 1/8 to four inches and a density in the range of from about one to about four pounds per cubic foot;
- first and second cover sheets secured to the respective first and second major opposed surfaces with the core sheet therebetween, the first and second cover sheets each comprising at least one sheet of cellulosic material with polyisocyanate within a range of about 8 percent to 20 percent by weight of polyisocyanate to cellulosic material;
- and
- wherein the core has a shear strength of from at least about 10 to about 30 psi and a shear modulus of from at least about 500 psi to about 1,000 psi.
Dependencies are inferred from the claim text.