US 12,173,509 B2
Method of reroofing
Jiansheng Tang, Carmel, IN (US); Michael J. Hubbard, Goshen, IN (US); Joseph Kalwara, Indianapolis, IN (US); Carl E. Watkins, Jr., Mount Juliet, TN (US); Brian Alexander, Westfield, IN (US); Todd D. Taykowski, Lebanon, TN (US); and Joseph R. Carr, Indianapolis, IN (US)
Assigned to Holcim Technology Ltd, Zug (CH)
Filed by Holcim Technology Ltd, Zug (CH)
Filed on May 2, 2023, as Appl. No. 18/311,040.
Application 18/311,040 is a continuation of application No. 16/088,176, abandoned, previously published as PCT/US2017/024192, filed on Mar. 25, 2017.
Claims priority of provisional application 62/313,239, filed on Mar. 25, 2016.
Prior Publication US 2023/0272619 A1, Aug. 31, 2023
Int. Cl. E04D 5/14 (2006.01); B32B 7/12 (2006.01); B32B 27/10 (2006.01); B32B 27/32 (2006.01); E04D 1/34 (2006.01); E04D 5/06 (2006.01)
CPC E04D 5/148 (2013.01) [B32B 7/12 (2013.01); B32B 27/10 (2013.01); B32B 27/32 (2013.01); E04D 5/06 (2013.01); B32B 2405/00 (2013.01); B32B 2419/06 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method of reroofing an existing roof system including an existing membrane, the method comprising:
(i) providing a membrane composite, where the composite includes a polymeric membrane and an adhesive layer disposed on a planar surface of the membrane, where the polymeric membrane is selected from the group consisting of EPDM, TPO, and PVC membranes, where the adhesive layer is applied to the membrane as a hot-melt adhesive and is at least partially cured by UV radiation such that the adhesive is not thermally processable and is characterized by an infinite polymer network, where the adhesive layer has a thickness of from about 2 to about 15 mil, the composite further comprising a release member removably attached to the adhesive layer;
(ii) removing debris from the existing membrane;
(iii) after said step of removing debris, washing the existing membrane;
(iv) removing the release member from said composite; and
(v) adhering the composite to the existing membrane by mating the adhesive layer to the membrane.