Insulation board with improved performance
An insulation board assembly, having: a foam insulation board; a top facer attached onto a top side of the foam insulation board, the top facer being made of woven material; and a bottom facer attached onto a bottom side of the foam insulation board, the bottom facer being made of woven material. The top and bottom woven facers may have upper and lower coatings and non-woven layers on either side and woven and non-woven layers may be held together with a tie layer.
1. A method of forming an insulation board assembly, comprising:
(a) providing a first roll of facer material, the first roll of facer material being woven and having a tensile strength greater than 80 lbf/3 inch in both a machine direction and a cross direction and a weight of 20 to 200gsm;
(b) providing a second roll of facer material, the second roll of facer material being woven and having a tensile strength greater than 80 lbf/3 inch in both a machine direction and a cross direction and a weight of 20 to 200gsm;
(c) applying foam between the first and second rolls of facer material to form an insulation board assembly that when adhered or mechanically fastened onto a roof assembly permits the roof assembly to meet the Very Severe Hail rating of FM 4470 (Class 1); and
(d) adhering or mechanically fastening the insulation board assembly onto a roof assembly such that the roof assembly meets the Very Severe Hail rating of FM 4470 (Class 1).
2. The method of claim 1 , wherein a bottom surface of the first roll of facer material is in direct contact with the foam, and wherein a top surface of the second roll of facer material is in direct contact with the foam during the application.
3. The method of claim 1 , wherein the first and second rolls of facer material each have a warp density from 4 to 30 ends per inch or a weft density from 4 to 30 picks per inch.
4. The method of claim 1 , wherein the first and second rolls of facer material each have a tear strength of over 15 lbf in both the machine direction and the cross direction.
5. The method of claim 1 , wherein the first and second rolls of facer material each comprise woven polypropylene and/or propylene alpha-olefin copolymers or ethylene alpha-olefin copolymers.
6. The method of claim 1 , wherein the first and second rolls of facer material comprise no glass fibers.
7. The method of claim 1 , wherein the first and second rolls of facer material comprise yarns or tapes.
8. The method of claim 1 , wherein the first and second rolls of facer material each have a thickness of 2 mil to 50 mil.
9. The method of claim 1 , wherein the foam is a polyisocyanurate or polyurethane foam.
10. The method of claim 1 , wherein the foam of the insulation board assembly has a density of 0.5 to 6.0 pcf.
11. The method of claim 1 , wherein the roof assembly consists of roof membrane, bonding adhesive and the insulation board assembly.
12. The method of claim 1 , wherein the first and second rolls of woven facer material comprises yarns or tapes made from synthetic polymers.
13. The method of claim 1 , further comprising: applying a polymer coating on one or both side of one or both of the first and second rolls of facer material.
14. The method of claim 1 , further comprising: applying a non-woven material laminated on one or both side of one or both of the facers first and second rolls of facer material.
15. The method of claim 14 , wherein the non-woven material is laminated via adhesive or a tie layer.
16. The method of claim 14 , wherein the non-woven material is selected from the group consisting of polyester, polyethylene, ethylene and alpha-olefin copolymers, polypropylene, propylene and alpha-olefin copolymers, nylon, glass, Kevlar, basalt, and carbon fiber.
17. The method of claim 1 , further comprising: applying a laminated glass mat, a glass scrim or a coated glass scrim on one or both side of one or both of the first and second rolls of facer material.