Composite membrane for building applications
A roofing composite membrane includes a base layer including a first thermoplastic polyolefin. A weight of the base layer is between 5 and 25 grams per square foot. A coating layer at least partially coats the base layer. The coating layer includes at least one inorganic additive, and a second thermoplastic polyolefin including polypropylene and having a melt flow rate between 0.5 grams per 10 minutes and 12 grams per 10 minutes.
1. A roofing system, comprising:
a steep sloped roof comprising a substrate;
a roofing composite membrane installed on the substrate, wherein the roofing composite membrane comprises:
a first layer comprising a polymer material;
wherein the first layer further comprises a plurality of pockets spaced along at least one side thereof;
a second layer covering the first layer, thereby to form a plurality of closed pockets; and
a gas trapped within the plurality of closed pockets, thereby to form a plurality of gas-filled pockets;
a roofing shingle installed directly on the roofing composite membrane
wherein the roofing shingle is an outermost layer and; and
wherein the roofing shingle is exposed to environment.
2. The roofing system of claim 1 , wherein the roofing composite membrane is configured to absorb and dissipate energy from an object impacting the roofing composite membrane sufficient to exhibit an impact resistance of at least a class 3 rating as measured according to UL 2218 Test Standard for Impact Resistance of Prepared Roof Covering Materials.
3. The roofing system of claim 1 , wherein the gas comprises air.
4. The roofing system of claim 1 , wherein the second layer comprises at least one of thermoplastic polyolefin (TPO) or polyvinylchloride (PVC).
5. The roofing system of claim 1 , wherein the second layer comprises at least one of a thermoplastic or a thermoset.
6. The roofing system of claim 1 , wherein each of the gas-filled pockets of the plurality of gas-filled pockets has a circular shape, diamond shape, square shape, or rectangular shape.
7. The roofing system of claim 1 , wherein the roofing composite membrane comprises a plurality of passages between the gas-filled pockets of the plurality of gas-filled pockets.
8. The roofing system of claim 1 , wherein the roofing composite membrane has a thickness of 1/16″ to ½″.
9. The roofing system of claim 1 , wherein the first layer comprises a plurality of ribs, wherein the plurality of ribs defines the plurality of pockets.
10. The roofing system of claim 1 , wherein an area of the plurality of gas-filled pockets is 30% of an area of the first layer.
11. A roofing system, comprising:
a sloped roof comprising a substrate;
a roofing composite membrane installed on the substrate, wherein the roofing composite membrane comprises:
a first layer,
wherein the first layer further comprises a plurality of pockets spaced along at least one side thereof;
a second layer covering the first layer, thereby to form a plurality of closed pockets;
a gas trapped within the plurality of closed pockets, thereby to form a plurality of gas-filled pockets;
an asphaltic roofing shingle installed directly on the roofing composite membrane
wherein the roofing shingle is an outermost layer; and
wherein the roofing shingle is exposed to environment.
12. The roofing system of claim 11 , wherein the first layer comprises at least one of plastic, rubber, paper, cardboard, or metal.
13. The roofing system of claim 11 , wherein the plurality of gas-filled pockets is configured to be compressible and dissipate energy when impacted by an object.
14. The roofing system of claim 11 , wherein the gas comprises air.
15. The roofing system of claim 11 , wherein the second layer comprises at least one of thermoplastic polyolefin (TPO) or polyvinylchloride (PVC).
16. The roofing system of claim 11 , wherein the second layer comprises at least one of a thermoplastic or a thermoset.
17. The roofing system of claim 11 , wherein each of the gas-filled pockets of the plurality of gas-filled pockets has a circular shape, diamond shape, square shape, or rectangular shape.
18. The roofing system of claim 11 , wherein the roofing composite membrane comprises a plurality of passages between the gas-filled pockets of the plurality of gas-filled pockets.
19. The roofing system of claim 11 , wherein the roofing composite membrane has a thickness of 1/16″ to ½″.
20. The roofing system of claim 11 , wherein the first layer comprises a plurality of ribs, wherein the plurality of ribs defines the plurality of pockets.