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US 2021/0262233 A1Published application
Fully-adhered roof system adhered and seamed with a common adhesive
AssigneeFirestone Building Products Company, LLC
InventorsJiansheng TANG, Michael J. HUBBARD, Joseph KALWARA, Carl E. WATKINS, JR., Brian ALEXANDER, Todd D. TAYKOWSKI, Joseph R. CARR
Life of this patent
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Abstract
A roof system comprising a roof substrate, a first membrane including first and second opposed planar surfaces, and a second membrane including opposed first and second planar surfaces, where said second membrane is adhered to said roof substrate through an adhesive disposed on said roof-substrate contacting portion of the first membrane, and where said second membrane is adhered to said first membrane through said adhesive disposed on a lap portion of said second membrane.
Claims18
A method of preparing a flat or low-sloped roof, the method comprising:
- (i) providing a roof deck with a layer of construction board disposed thereon, where the layer of construction boards includes cellulosic or glass facer;
- (ii) providing first and second membrane composites, where each membrane composite includes a polymeric sheet having a roof-facing surface and an upward-facing surface and first and second lateral edges;
- said roof-facing surface having disposed thereon a layer of pressure-sensitive adhesive, where the layer of pressure-sensitive is disposed on the entirety of the roof-facing surface from the first lateral edge to the second lateral edge, the pressure-sensitive adhesive layer including a UV-cured polyacrylate having a gel content, as determined by THF extraction after boiling in THF after four hours, of at least 50% by weight, and where the polyacrylate, prior to UV curing, has a Tg of less than −20° C. and a number average molecular weight of from about 100 to about 350 kg/mol, and where the membrane composite further includes a release member disposed on the layer of pressure-sensitive adhesive;
- (iii) removing the release member from the first membrane composite;
- (iv) securing the first membrane composite to the layer of construction boards by mating the pressure-sensitive adhesive to the layer of construction boards;
- (v) positioning the second membrane composite adjacent to the first membrane composite in a manner that the second membrane composite partially overlaps the first membrane composite to thereby form a lap portion;
- (vi) removing the release member from the second membrane composite;
- (vii) securing the second membrane composite to the layer of construction boards by mating the pressure-sensitive adhesive on the second membrane composite to the layer of construction boards;
- (viii) applying a primer to the upward-facing surface of the first composite in the lap portion to thereby form a primed portion on the first membrane composite;
- (ix) forming a seam between the first membrane composite and the second membrane composite by mating the pressure-sensitive adhesive of the second membrane composite to the primed portion of the first membrane composite, said seam including a seam edge formed by a lateral edge of the second membrane composite;
- and
- (x) applying a sealant along the seam edge.
9 more elements
A method of installing a roof system, the method comprising:
- (i) providing a first polymer membrane sheet secured to a roof surface, the first polymer membrane sheet including a upward-facing surface and a first lateral edge, the first polymer membrane sheet further including a layer of primer disposed on a portion of said upward-facing surface along said first lateral edge;
- (ii) providing a membrane composite including a polymer membrane having and upward-facing surface and downward-facing surface, first and second lateral edges, a pressure-sensitive adhesive layer disposed on the downward-facing surface and extending from the first lateral edge to the second lateral edge, and a release member removably affixed to the pressure-sensitive adhesive layer, where said pressure-sensitive adhesive is a UV-cured polyacrylate having a gel content, as determined by THF extraction after boiling in THF after four hours, of from about 50% to about 90%, and where said UV-cured polyacrylate, prior to being cured, includes one or more units defined by the formula:
- where each R1 is individually hydrogen or a hydrocarbyl group and each R2 is individually a hydrocarbyl group;
- (iii) positioning the membrane composite adjacent to the first polymer membrane sheet secured to a roof surface, where said step of positioning places the membrane composite in an manner that overlaps the primer layer disposed on the first polymer membrane;
- (iv) adhesively securing the membrane composite to the roof surface by mating a portion of the pressure-sensitive adhesive layer to the roof surface;
- (v) adhesively securing the membrane composite to the first polymer membrane by mating a portion of the pressure-sensitive adhesive layer to the primed surface.
3 more elements
A membrane composite comprising:
- (i) a membrane panel having opposed first and second planar surfaces, said first planar surface including a roof-substrate contacting portion and a lap portion;
- (ii) a UV-cured adhesive disposed on said roof-substrate contacting portion and said lap portion;
- and
- (iii) a release member removable affixed to said UV-cured adhesive in both said roof-substrate contacting portion and said lap portion, where said UV-cured adhesive disposed on said roof-substrate portion and said lap portion is substantially homogeneous.
1 more element
Dependencies are inferred from the claim text.