The present invention is a vinyl siding panel and a method of making the vinyl siding panel. One embodiment of the vinyl siding panel comprises a planar row extending the longitudinal length of the vinyl siding panel. The siding panel may also have a slightly curved row. A reinforcement panel may be secured to the siding panel. In such case, the slightly curved row of siding may be secured to a planar portion of the reinforcement panel. In addition, an intermediate portion of the siding panel may be thicker than the outer portions of the siding panel.
1. A siding panel unit comprising:
a vinyl siding panel comprising:
a first row having a width of at least about 4 inches from one edge to another edge, said first row having a radius curvature between about 63.5 inches and about 300 inches from said one edge to said another edge;
and
a second row having a width of at least about 4 inches from one edge to another edge, said second row connected to said first row by a first seam to define a stepped contour, said second row having a radius curvature between about 31.75 inches and about 215 inches from said one edge to said another edge; and
a reinforcement panel adjacent to said siding panel, said reinforcement panel having a first portion and a second portion, said first portion adjacent to said first row of said vinyl siding panel and having a radius curvature greater than said radius curvature of said first row of said vinyl siding panel, and said second portion adjacent to said second row of said vinyl siding panel and having a radius curvature greater than said radius curvature of said second row of said vinyl siding panel;
wherein said radius curvatures of said vinyl siding panel are determined prior to said vinyl siding panel being positioned adjacent to said reinforcement panel such that the radius curvature of said first row is greater than the radius curvature of said second row;
wherein said vinyl siding panel is secured to said reinforcement panel such that said radius curvatures of said first row and said second row of said vinyl siding panel are increased; and
wherein said siding panel unit has improved resistance to oil canning relative to a similar siding panel unit that has straight siding panel rows with no radius curvature prior to being secured to a reinforcement panel, such that said siding panel unit simulates the appearance of straight face siding.
2. The siding panel unit of claim 1 wherein said first row is a top row of said siding panel.
3. The siding panel unit of claim 1 wherein said first row and said second row each have a surface variance between about 0.01 inch and about 0.1 inch.
4. The siding panel unit of claim 1 wherein said siding panel has a width of at least about 12 inches.
5. The siding panel unit of claim 1 wherein said first row and said second row each have a width between about 4 inches and about 8 inches.
6. The siding panel unit of claim 1 further comprising:
a third row connected to said second row by a second seam to define said stepped contour, said third row having a radius curvature between about 31.75 inches and about 215 inches;
wherein the radius curvature of said first row is greater than the radius curvature of said third row.
7. The siding panel unit of claim 6 wherein the radius curvature of said third row is substantially similar to the radius curvature of said second row.
8. The siding panel unit of claim 6 further comprising:
a fourth row connected to said third row by a third seam to define said stepped contour, said fourth row having a radius curvature between about 31.75 inches and about 215 inches;
wherein the radius curvature of said first row is greater than the radius curvature of said fourth row.
9. The siding panel unit of claim 8 wherein the radius curvature of said fourth row is substantially similar to the radius curvature of said second row and said third row.
10. The siding panel unit of claim 1 wherein an upper portion of said first row is unsecured to said reinforcement panel.
11. The siding panel unit of claim 1 wherein at least one side edge portion of said first row and said second row is unsecured to said reinforcement panel.
12. The siding panel unit of claim 1 further comprising a nailing strip connected to an edge portion of said first row opposite said second row.
13. The siding panel unit of claim 12 wherein said nailing strip is unsecured to said reinforcement panel.