Roof coating composition and construction
AssigneeGlobal Coatings Limited
InventorJohn H. Kaufmann
Life of this patent
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Abstract
A roof having an insulating blanket of plastic foam covered by a protective sheath made up of a shell of reinforced concrete covered by a weather-impervious rubbery textured membrane. The membrane and the shell are married together in the sheath, the shell providing load bearing strength and the membrane protecting the shell and preserving its properties. The shell adheres tenaciously to the insulating blanket and the membrane to the shell. In a preferred construction, the sheath forms a protective bonnet having a girdle surrounding the eaves and verge further anchoring the roof covering to the superstructure of the building. Shingles of special construction preferably make up the insulating blanket. Special cement and latex binder compositions are disclosed for the shell and membrane respectively.
Claims7
A method of providing a structural surface normally exposed to the elements with a protective load-bearing sheath, comprising,
- spreading on said surfce in a continuous layer having a thickness from about 1.5 mm to about 5 mm a flowable cement composition made up of a modified hydraulic cement modified with a minor amount of an acrylic latex cement modifier, dense finely divided aggregate, reinforcing material, and water, allowing the material thus applied to harden to a continuous hard tough load-carrying concrete shell capable of taking up moisture covering said surface and adhering tenaciously to it,
- spreading directly on the surface of the hard shell to form a continuous layer having a thickness from about 0.75 mm to about 3 mm a flowable mixture of a binder material of a non-plasticized latex of elastomeric type acrylic polymer filled with finely divided opaque extender, allowing the latex to dry into a rubbery textured protective membrane, having capillary openings to permit escape of moisture from the membrane itself and from the concrete shell, adhering tenaciously to the surface of the shell, whereby the shell and membrane constitute a continuous composite load-bearing weatherproof sheath protecting the structural surface.
Dependencies are inferred from the claim text.