Single-ply sealed membrane roofing system

Abstract

A single-ply roofing system comprising parallel strips of membrane (10) laid on a roof deck (14) with at least one side edge of each strip secured to the deck by mechanical fasteners (16), the side edges of contiguous strips being bonded together, each strip having transverse membrane flaps (11) secured to its undersurface at longitudinal intervals and the flaps being secured to the deck by mechanical fasteners (16).

I claim: 
     
       1. The method of laying a single-ply sealed fiber-reinforced membrane covering over a roof deck comprising, providing rolls of membrane strips having transverse flaps of membrane substantially coextensive of width to said strips, one transverse edge portion of each flap being secured to the undersurface of said strips at longitudinal intervals, unrolling the strips successively in parallel side-by-side positions on the deck with their marginal side edge portions contiguous, mechanically fastening successive flaps of each strip at transverse intervals to the deck, mechanically fastening at least one marginal edge portion of each strip at longitudinal intervals to the deck, and bonding the marginal side edge portions of the strips together.Iadd., the successive flaps on laterally contiguous strips being staggered with respect to each other..Iaddend. .[.2. The method as described in claim 1, wherein the flaps are secured to the strips at intervals of about five to six feet..]. .[.3. The method as described in claim 2, wherein the successive flaps on laterally contiguous strips are staggered with respect to each other..]. .[.4. The method as described in claim 1, wherein the successive flaps on laterally contiguous 
     
     
        strips are staggered with respect to each other..]. 5. The method as described in claim 1, wherein one marginal side edge portion of each strip is lapped over and bonded to the mechanically fastened marginal edge 
     
     
        portion of the next contiguous strip. 6. The method as described in claim 5, wherein the flaps are secured to the strips at intervals of about five to six feet. .[.7. The method as described in claim 6, wherein the flaps 
     
     
        on contiguous strips are staggered with respect to each other..]. 8. The method .[.as described in claim 1, wherein.]. .Iadd.of laying a single-ply sealed fiber-reinforced membrane covering over a roof deck comprising, providing rolls of membrane strips having transverse flaps of membrane substantially coextensive of width to said strips, one transverse edge portion of each flap being secured to the undersurface of said strips at longitudinal intervals, unrolling the strips successively in parallel side-by-side positions on the deck with their marginal side edge portions contiguous, mechanically fastening successive flaps of each strip at transverse intervals to the deck, mechanically fastening at least one marginal edge portion of each strip at longitudinal intervals to the deck, and bonding the marginal side edge portion of the strips together, .Iaddend.at least one end of each flap .[.is.]. .Iadd.being .Iaddend.notched to clear the overlapped .[.marginal.]. edge portions of 
     
     
        the strips. 9. The method as described in claim 8, wherein the successive flaps on laterally contiguous strips are staggered with respect to each 
     
     
        other. 10. A single-ply roofing system comprising, parallel strips of fiber-reinforced membrane sheeting laid undoubled on a roof deck with their longitudinal marginal edge portions contiguous, mechanical fastener means securing at least one marginal edge portion of each strip to the deck at longitudinal intervals, the marginal edge portions being bonded together, each of said membrane strips having transverse membrane flaps at longitudinal intervals substantially coextensive to said strips in width one transverse edge portion of each flap being secured to the undersurface of the strip, and mechanical fastener means securing said flaps to said deck at transverse intervals.Iadd., the successive flaps of contiguous 
     
     
        strips being staggered with respect to each other..Iaddend.11. A single-ply roofing system .[.as described in claim 10, wherein.]. .Iadd.comprising, parallel strips of fiber-reinforced membrane sheeting laid undoubled on a roof deck with their longitudinal marginal edge portions contiguous, mechanical fastener means securing at least one marginal edge portion of each strip to the deck at longitudinal intervals, the marginal edge portions being bonded together, each of said membrane strips having transverse membrane flaps at longitudinal intervals substantially coextensive to said strips in width one transverse edge portion of each flap being secured to the undersurface of the strip, and mechanical fastener means securing said flaps to said deck at transverse intervals, .Iaddend.at least one end of each flap .[.is.]. .Iadd.being .Iaddend.notched to clear the contiguous marginal edge portions of the 
     
     
        strips. 12. A single-ply roofing system as described in claim 11, wherein the successive flaps of contiguous strips are staggered with respect to 
     
     
        each other. 13. A single-ply roofing system as described in claim .[.12.]. .Iadd.10 .Iaddend.wherein said flaps are spaced apart at intervals of 
     
     
        about five to six feet. 14. A single-ply roofing system as described in 
     
     
        claim 13, wherein said membrane strips are at least 10 feet wide. 15. A single-ply roofing system as described in claim 10, wherein one marginal edge portion of each strip is lapped over and bonded to the mechanically 
     
     
        fastened edge portion of the next contiguous strip. 16. A single-ply roofing system .[.as described in claim 15, wherein.]. .Iadd.comprising parallel strips of fiber-reinforced membrane sheeting laid undoubled on a roof deck with their longitudinal marginal edge portions contiguous, mechanical fastener means securing at least one marginal edge portion of each strip to the deck at longitudinal intervals, the marginal edge portions being bonded together, each of said membrane strips having transverse membrane flaps at longitudinal intervals substantially coextensive to said strips in width one transverse edge portion of each flap being secured to the undersurface of the strip, and mechanical fastener means securing said flaps to said deck at transverse intervals, one marginal edge portion of each strip being lapped over and bonded to the mechanically fastened edge portion of the next contiguous strip, and .Iaddend.at least one end of each flap .[.is.]. .Iadd.being .Iaddend.notched to clear the overlapped mechanically fastened edge portion of the next contiguous strip. .[.17. A single-ply roofing system as described in claim 16, wherein the successive flaps of contiguous strips are staggered with respect to each other..]. .[.18. A single-ply roofing system as described in claim 10, wherein the successive flaps of contiguous strips are staggered with respect to each other..]. .[.19. A single-ply roofing system as described in claim 18, wherein said flaps are spaced apart at intervals no greater than five feet. .[.20. A single-ply roofing system as described in claim 19, wherein said membrane strips are at least 10 feet wide..]. .[.21. A single-ply roofing system as described in claim 10, wherein said flaps are spaced apart at intervals no greater than five feet..]. .[.22. A single-ply roofing system as described in claim 21, wherein said membrane strips are at least 10 feet wide..]. 
     
     
        .Iadd.3.  The method of laying a single-ply sealed fiber-reinforced membrane covering over a roof deck comprising the steps of: providing rolls of membrane strips having transverse flaps of membrane substantially coextensive of width to said strips, one transverse edge portion of each flap being secured to the undersurface of said strips at longitudinal intervals;   unrolling the strips successively in parallel side-by-side positions on the deck with their marginal side edge portions contiguous;   mechanically fastening successive flaps of each strip at transverse intervals to the deck;   staggering said successive flaps on laterally contiguous strips with respect to each other; and, continuously bonding the marginal side edge   
     
     
        portions of the strips together..Iaddend. .Iadd.24.  A single-ply roofing system comprising: parallel strips of fiber-reinforced membrane sheeting laid unrolled on a roof deck with their longitudinal marginal edge portions contiguous;   each of said membrane strips having transverse membrane flaps at longitudinal intervals substantially coextensive to said strips in width;   said successive flaps of contiguous strips being staggered with respect to each other;   the marginal edge portions being continuously bonded together;   one transverse edge portion of each flap being secured to the undersurface of the strip; and,   mechanical fastener means securing said flaps to said deck at transverse intervals..Iaddend.