Roofing system and roofing shingles

A roofing system comprising:

• a) a roof deck of a building;
• b) a first layer of underlayment material attached to said roof deck, wherein said material is comprised of a substrate having an ionic charge coated with a coating having essentially the same ionic charge wherein said coating consists essentially of a filler material and a binder material and wherein said binder material bonds the filler material together and to the substrate and wherein said coating does not bleed through said substrate;
• c) a second layer of said underlayment material attached to said first layer;
• and
• d) a multiplicity of courses of roofing shingles attached to said second layer of underlayment material.

A laminated roofing shingle for installation on a roof in multiple courses comprising:

• a first shingle sheet having a headlap section that is covered when the shingle is installed with an overlapping shingle course above and a buttlap section that is exposed when the shingle is installed with an overlapping shingle course above, the buttlap section being at least about 60% of the width of the shingle, the first shingle sheet including a plurality of tabs having a length measured in the direction of the width of the shingle which are spaced apart to define one or more openings between said tabs, each of said tabs having a relatively uniform color throughout the tab, and the length of at least one tab being at least about 60% of the width of the shingle;
• a second shingle sheet attached to the underside of said first shingle sheet and having portions exposed through said openings between said tabs;
• said second shingle sheet having at least first, second, and third horizontal striations thereon across at least partial portions of said second sheet which are exposed through said openings between said tabs;
• said first striation comprising a first elongated quadrilateral area, said first striation having a substantially uniform dark color throughout said first quadrilateral area;
• said second striation comprising a second elongated quadrilateral area below said first striation, said second striation having a substantially uniform color throughout said second quadrilateral area, said color of said second striation being lighter than said color of said first striation;
• and
• said third striation comprising a third elongated quadrilateral area below said second striation, said third striation having a substantially uniform color throughout said third quadrilateral area, said color of said third striation being lighter than said color of said second striation;
• whereby at least said second and third striations provide a color gradation on at least partial portions of said second sheet which are exposed through said openings between said tabs.