Pedestaled roof underlayment systems and methods are disclosed herein. A pedestaled roof underlayment system comprises a pedestaled sheet including a plurality of regularly spaced pedestals on one side and a generally flat surface on the other side. The system includes a multi-layer roofing underlay
Pedestaled roof underlayment systems and methods are disclosed herein. A pedestaled roof underlayment system comprises a pedestaled sheet including a plurality of regularly spaced pedestals on one side and a generally flat surface on the other side. The system includes a multi-layer roofing underlayment including a slip resistant top layer, a UV protection layer and a strength layer. A reflective barrier layer may be included with the multi-layer roofing underlayment. The pedestaled sheet may be conical and/or tapered, and may have a top shape and cross section that may be circular, triangular, hexagonal and square.
대표청구항▼
1. A pedestaled roof underlayment structure comprising: a pedestaled sheet including a matrix of individual pedestals integrally formed with the sheet and arranged in rows and columns on a first side of the sheet and a generally flat surface on a second side of the sheet, the second side structured
1. A pedestaled roof underlayment structure comprising: a pedestaled sheet including a matrix of individual pedestals integrally formed with the sheet and arranged in rows and columns on a first side of the sheet and a generally flat surface on a second side of the sheet, the second side structured to be laid on a roof deck structure over an attic cavity, each pedestal having a base, a side wall, and a top with a planform shape of one from among circular, triangular, hexagonal, and square, the pedestals separated from one another by a distance in the range from 0.188 inch to 0.40 inch in all directions at the base, the pedestaled sheet formed of material, the top having a hole configured to improve adhesive attachment; anda multi-layer roofing underlayment above the first side of the pedestaled sheet and configured to attach to the pedestaled sheet with adhesive in the hole of the pedestal and to form an air gap between the pedestaled sheet and the multi-layer roofing underlayment, the air gap extending through and between an area adjacent to the regularly spaced pedestals, the multi-layer roofing underlayment including a slip resistant top layer, a UV protection layer and a strength layer, wherein the slip resistant top layer is non-woven, spun-bond polypropylene or polyester fabric pressed deeply into the UV protection layer with a coefficient of friction to provide a slip-resistant surface while reducing loose fiber detachment, and wherein the strength layer is woven from strands of a thermoplastic polymer, the underlayment including a reflective barrier layer configured to bear against the pedestaled sheet and to reflect thermal radiation and reduce radiant heat transfer into the attic cavity. 2. The pedestaled roof underlayment structure of claim 1 wherein the pedestals are one inch in height on the first side of the pedestaled sheet. 3. The pedestaled roof underlayment structure of claim 1 wherein the multi-layer roofing underlayment is breathable. 4. The pedestaled roof underlayment structure of claim 1 wherein the pedestals have a cross-sectional shape selected from the group including rectangle, conical, and tapered. 5. The pedestaled roof underlayment structure of claim 1 wherein the top of the pedestals is textured to provide a non-slip surface for the underlayment. 6. The pedestaled roof underlayment structure of claim 1 wherein the top of each pedestal includes an indentation. 7. The pedestaled roof underlayment structure of claim 1 wherein the pedestaled sheet is made from at least one selected from the group including high impact polystyrene (HIPS), polyvinyl chloride (PVC), plastic, polyethylene, polystyrene, and polypropylene. 8. The pedestaled roof underlayment structure of claim 1 wherein the pedestaled sheet includes a fire retardant. 9. The pedestaled roof underlayment structure of claim 1 wherein the pedestaled sheet includes a non-slip layer on the second side. 10. The pedestaled roof underlayment structure of claim 1 wherein the pedestaled sheet includes a metalized reflectant coating on either side. 11. The pedestaled roof underlayment structure of claim 1 wherein the multi-layer roofing underlayment is coupled with the first side of the pedestaled sheet. 12. The pedestaled roof underlayment structure of claim 1 wherein the slip resistant top layer is non-woven, spun-bond polypropylene or polyester fabric. 13. The pedestaled roof underlayment structure of claim 1 wherein the UV protection layer is polypropylene. 14. The pedestaled roof underlayment structure of claim 1 wherein the thermoplastic polymer is selected from the group including polypropylene, polyethylene, polyester, nylon, and thermoplastic polyolefin (TPO). 15. The pedestaled roof underlayment structure of claim 1 wherein the multi-layer roofing underlayment further includes a bottom coating applied to the strength layer, the bottom coating comprising a polypropylene coating. 16. The slip-resistant top layer of claim 13 wherein the slip resistant top layer provides an anchor for polyurethane adhesive attachment of roof tiles. 17. A roof of a building having a pedestaled roof underlayment structure, the pedestaled roof underlayment structure comprising: a pedestaled sheet including a matrix of individual, regularly spaced pedestals on a first side of the sheet and a generally flat surface on a second side of the sheet, the second side structured to be laid on a roof deck structure, each individual pedestal having a base, a tapered side wall, and a top with a circular planform shape having a diameter in the range of 0.25 inch to 0.375 inch and a diameter at the base in the range of ⅜ inch to 15/16 inch, the pedestals separated from one another by a distance in the range from 0.188 inch to 0.40 inch in all directions at the base, the pedestaled sheet formed of material to support the weight of those walking on the underlayment structure, the top having a hole configured to improve adhesive attachment; anda multi-layer roofing underlayment above the first side of the pedestaled sheet and configured to attach to the pedestaled sheet with adhesive in the hole of the pedestal and to form an air gap between the pedestaled sheet and the multi-layer roofing underlayment, the air gap through and between an area adjacent to the regularly spaced pedestals, the multi-layer roofing underlayment including a slip resistant top layer, a UV protection layer and a strength layer, wherein the slip resistant top layer is non-woven, spun-bond polypropylene or polyester fabric pressed deeply into the UV protection layer with a coefficient of friction to provide a slip-resistant surface while reducing loose fiber detachment, and wherein the strength layer is woven from strands of a thermoplastic polymer, the underlayment including a reflective barrier layer configured to bear against the pedestaled sheet and to reflect thermal radiation and reduce radiant heat transfer to the roof deck structure and an underlying attic cavity. 18. The roof of claim 17 wherein the multi-layer roofing underlayment includes a reflective barrier layer. 19. The roof of claim 17 wherein the multi-layer roofing underlayment is breathable. 20. The roof of claim 17 wherein the pedestals have a cross-sectional shape selected from the group including rectangular, conical, and tapered, and each pedestal includes an indentation in the top. 21. The roof of claim 17 wherein the pedestaled sheet is made from at least one selected from the group including high impact polystyrene (HIPS), polyvinyl chloride (PVC), plastic, polyethylene, polystyrene, and polypropylene. 22. The roof of claim 17 wherein the pedestaled sheet includes a fire retardant. 23. The roof of claim 17 wherein the pedestaled sheet includes a metalized reflectant coating on either side. 24. The roof of claim 17 wherein the pedestaled sheet includes a non-slip layer on the second side. 25. The roof of claim 17 wherein the multi-layer roofing underlayment is coupled with the first side of the pedestaled sheet. 26. The roof of claim 17 wherein the slip resistant top layer is non-woven, spun-bond polypropylene or polyester fabric. 27. The roof of claim 17 wherein the UV protection layer is polypropylene. 28. The roof of claim 17 wherein the thermoplastic polymer is selected from the group including polypropylene, polyethylene, polyester, nylon, and thermoplastic polyolefin (TPO). 29. The roof of claim 17 wherein the multi-layer roofing underlayment further includes a bottom coating applied to the strength layer, the bottom coating comprising a polypropylene coating.
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