Pre-primed roofing membrane
View Patent ↗A roofing membrane assembly includes a membrane having a top surface, bottom surface, first longitudinal edge and second longitudinal edge. A first primed area is located at the top surface along the first longitudinal edge. A second primed area is located on the bottom surface along the second longitudinal edge. A tape is secured to the membrane on the first primed area. A first release liner is positioned over the tape and a second release liner positioned over the second primed area.
1. A roofing membrane assembly comprising:
a roofing membrane having a top surface, a bottom surface, a first longitudinal edge and second longitudinal edge;
a primed area along one of said first longitudinal edge on said top surface or a primed area along one of said second longitudinal edge on said bottom surface, said primed area having a thickness of less than 0.007 inches; and
a release liner disposed on and detachably adhered to said primed area so as to form a temporary bond directly between said release liner and said primed area.
2. A roofing membrane assembly comprising:
a roofing membrane having a top surface, a bottom surface, a first longitudinal edge and a second longitudinal edge;
a first primed area along said first longitudinal edge on said top surface, said first primed area having a thickness of less than 0.007 inches;
a first release liner disposed on and detachably adhered to said first primed area so as to form a temporary bond directly between said first release liner and said first primed area;
a second primed area along said second longitudinal edge on said bottom surface;
an adhesive tape positioned on said second primed area; and
a second release liner disposed on and detachably adhered to said adhesive tape.
3. A roofing membrane assembly according to claim 2 , wherein said second primed area has a thickness of less than 0.007 inches.
4. A roofing membrane assembly according to claim 3 , wherein said adhesive tape is secured to another membrane when said release liner is removed so as to form a lap seam having a peel strength of at least 1.8 pli.
5. A roofing membrane assembly according to claim 2 , where said membrane is between about 25 feet to about 400 feet long in the longitudinal direction.
6. A roofing membrane assembly according to claim 2 , where said membrane is between about 3 feet to about 50 feet wide in the transverse direction.
7. A roofing membrane assembly according to claim 2 , where said primed area includes a solvent based primer.
8. A roofing membrane assembly according to claim 7 , where said primer contains less than 20% solids.
9. A roofing membrane assembly according to claim 2 , where said membrane is made of EPDM.
10. The roofing membrane assembly according to claim 2 , where the primed area is characterized by a tack that has a peel strength of less than 1.0 pli, as determined by ASTM D413, when tested on a lap seam formed by two primed surfaces without a tape.