Roofing shingle with headlap seal and improved coverage
View Patent ↗A roofing shingle for enhanced wind/rain durability embodies two transverse lines of adhesion. A first discontinuous line of adhesive joins the butt edge of an overlying shingle to the underlying shingle. Secondly, a band of sealant adjacent the top edge of an underlying shingle seals against an overlying shingle to prevent penetration by wind driven rain to the roof deck. A reduced headlap is thereby permitted, thereby either reducing shingle size or extending shingle coverage. Exposed portions of the sealant band improve the erosion resistance of underlying shingles.
1. A roofing shingle for a roofing system of multiple overlapping shingles, the shingle being monoplanar and having a weather-resistant exterior face, opposed side edges and a width extending from a butt edge to a top edge, with an exposed portion of the exterior face having a predetermined width of length E extending from the butt edge and, in use, a covered portion extending from the exposed portion, to the top edge,
wherein the width of the shingle is more than twice the length E of the exposed portion;
wherein the covered portion of the shingle is provided with an adhesive strip offset from the butt edge by a distance greater than the length E, the adhesive strip being adapted to adhere to an adjacent shingle; and
wherein the covered portion of the shingle is provided with a continuous sealant band parallel to and offset from the top edge, the band having a width extending between a lower imaginary line located no more than the length 2E from the butt edge of the shingle and an upper imaginary line about ¼ inch from the top edge.
2. The shingle of claim 1 wherein the lower imaginary line is located between the length 2E and 2E−1 inch from the butt edge.
3. The shingle of claim 1 wherein the width of the shingle is the length 2E, plus Y where Y is 2 inches or less.
4. The shingle of claim 3 wherein Y is 1 inch or less.
5. The shingle of claim 1 wherein one or more cut-outs extend normal to the butt edge a distance E, thereby defining tabs between the cut-outs.
6. The shingle of claim 5 wherein a portion of the sealant band is adapted to be exposed at the apex of said cut-outs of an overlapping shingle.
7. The shingle of claim 6 wherein the sealant is erosion resistant.
8. The shingle of claim 1 wherein the sealant of the sealant band is a butyl, acrylic, bituminous or modified bituminous composition.
9. The shingle of claim 1 wherein the side edges of the shingle have complimentary spacing indicators.
10. The shingle of claim 9 wherein spacing indicators are notches or slits.
11. The shingle of claim 9 wherein the spacing indicators are offset stepped rectilinear notches.
12. The shingle of claim 11 wherein each side edge has two successively inset rectilinear notches, the first notch located a distance equal to said cut-out length from the butt edge, and the second notch inset further than the first notch at a selected distance above the first notch.
13. The shingle of claim 10 wherein each side edge has two spacing indicators, the first indicator being a notch located a distance equal to said cut-out length from the butt edge, and the second indicator being a slit positioned at a selected distance from the first indicator.
14. The shingle of claim 13 wherein the selected distance is in the range of ½ inch to 1 ½ inch.
15. A roofing shingle for a roofing system of multiple overlapping shingles, the shingle being monoplanar and having a weather resistant exterior faces, opposed side edges and a width extending from a butt edge to a top edge, with a covered portion, in use, extending from the top edge and an exposed portion of the exterior face extending from the butt edge, the exposed portion including at least one cut-out having a length extending perpendicularly across the exposed portion, thereby defining two or more tabs;
wherein the width of the shingle is more than twice said cut-out length; and
wherein the exterior face of the shingle is provided with an adhesive strip and a sealant band adapted to adhere the shingle to an overlapping shingle, the strip being discontinuous and aligned on the covered portion parallel to the butt edge above an apex of said cut-out, and the sealant band is continuous being positioned at an imaginary line parallel to and twice the cut-out length from the butt edge.
16. The shingle of claim 15 wherein the width of the shingle is twice the cut-out length, plus a headlap distance.
17. The shingle of claim 16 wherein the headlap distance ranges from ¼ inch to 2 inches.
18. The shingle of claim 16 wherein the headlap distance ranges from ¼ inch to ¾ inch.
19. The shingle of claim 15 wherein at least a portion of the sealant band is offset toward the butt edge of the shingle from the imaginary line.
20. The shingle of claim 19 wherein the sealant band brackets the imaginary line.
21. The shingle of claim 19 wherein the sealant band is parallel to but offset from the top edge of the shingle.
22. The shingle of claim 21 wherein the width of the sealant band is in the range of ¼ inch to 2 inches.
23. The shingle of claim 21 wherein the width of the sealant band is in the range of ½ inch to 1 inch.
24. The shingle of claim 15 wherein the sealant is an erosion resistant composition.
25. The shingle of claim 24 wherein the sealant is a suitable acrylic, butyl, bitumenous or modified bitumenous composition.
26. The shingle of claim 15 wherein the side edges of the shingles have complimentary spacing indicators.
27. The shingle of claim 26 wherein spacing indicators are notches or slits.
28. The shingle of claim 26 wherein the spacing indicators are offset stepped rectilinear notches.
29. The shingle of claim 28 wherein each side edge has two successively inset rectilinear notches, the first notch located a distance equal to said cut-out length from the butt edge, and the second notch inset further than the first notch at a selected distance above the first notch.
30. The shingle of claim 27 wherein each side edge has two spacing indicators, the first indicator being a notch located a distance equal to said cut-out length from the butt edge, and the second indicator being a slit positioned at a selected distance from the first indicator.
31. The shingle of claim 30 wherein the selected distance is in the range of ½ inch to 1 ½ inches.
32. A roofing shingle system comprising multiple overlapping shingles, each shingle having a weather-resistant exposed surface, and a width extending from a butt edge to a top edge and at least one cut-out extending perpendicularly from the butt edge wherein the width of the shingle is at least twice the length of the cut-out,
wherein a discontinuous adhesive strip on each shingle extends in a line of spaced adhesive elements offset toward the top edge of the shingle from each apex of each cut-out;
wherein a continuous sealant band on each shingle extends parallel to the top edge of the shingle but offset therefrom, located on an imaginary line at twice the cut-out length from the butt edge of the shingle, the band having a width extending on both sides of said imaginary line; and
wherein a portion of the sealant band on each shingle is exposed at each apex of each cut-out of the overlying shingle.
33. The roofing shingle system of claim 32 wherein the sealant band is at least ¼ inch wide.
34. The roofing shingle system of claim 33 wherein the width of the sealant band is between ¼ inch and 1 ½ inches.
35. The roofing system of claim 32 wherein the sealant band is offset from the top edge by a distance sufficient to prevent bleeding of the sealant over the top edge.
36. The roofing system of claim 35 wherein the distance is in the range of ¼ inch to ⅜ inch.
37. A roofing system of multiple associated overlapping shingles, each shingle having a weather resistant exposed surface and having a width extending from a butt edge to a top edge, each shingle having at least one cut-out having a length extending perpendicularly from the butt edge;
wherein the width of the shingle is twice the length of cut-out, plus a headlamp distance Y where Y is a length of 1 inch or less;
and further wherein each shingle has a adhesive strip parallel to and offset towards the top edge by a distance greater than the length of the cut-out from the butt edge of the shingle, and a continuous sealant band positioned on an imaginary line parallel to and at a distance twice the length of the cut-out from the butt edge of the shingle.
38. The roofing shingle system of claim 37 wherein the sealant band is at least ¼ inch wide.
39. The roofing shingle system of claim 38 wherein the width of the sealant band is between ¼ inch and 1 ½ inches.
40. The roofing system of claim 37 wherein the sealant band is offset from the top edge by a distance sufficient to prevent bleeding of the sealant over the top edge.
41. The roofing system of claim 40 wherein the distance is in the range of ¼ inch to ⅜ inch.
42. A method of manufacturing a shingle having a top edge, a butt edge and one or more tabs defined by cut-outs normal to the butt edge and having a length, comprising coating a base member with a granular weather resistant material on the upper surface thereof, applying a discontinuous strip of adhesive to the upper surface, the strip being located a distance greater than the length of the cut-out from the butt edge of the shingle and applying a continuous band of sealant to the upper surface, the band being located a distance generally twice the length of the cut-out from the butt edge of the shingle and offset from the top edge.
43. The method of claim 42 wherein the width of the sealant band brackets an imaginary line at a distance twice of the length of the cut-out from the butt edge of the shingle.
44. The method of claim 43 wherein the width of the sealant band ranges from ¼ inch to 1 ½ inches.
45. The method of claim 42 wherein the offset is at least about ¼ inch.