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Find Hip and Ridge Cap Angles for Metal Roofing

This was a rough and quick video, but it shows how to obtain some difficult key angles in metal roofing. To find interior angle of hip caps, the angle needs to be perpendicular to the hip line. Thus, it is slightly different than just using 180°-(2)(hip walk angle). On a flat roof, this is perpendicular. But at other slopes, you need to adjust (for an 8:12 slope, you would need 5 1/8 slope [23.13°] rather than 5 11/16 slope [25.36°]).

 

Hip Cap Interior Angle (Bent at Supplier):
36:12 -> 95.74°
12:12 -> 120.02°
10:12 -> 126.17°
8:12 -> 133.69°
6:12 -> 143.00°
4:12 -> 154.62°
2:12 -> 166.14°
1:12 -> 172.39°
Ridge Cap Interior Angle (Bent at Supplier):
36:12 -> 36.87°
12:12 -> 90.00°
10:12 -> 100.39°
8:12 -> 112.62°
6:12 -> 126.87°
4:12 -> 143.13°
2:12 -> 161.08°
1:12 -> 170.47°
Here is hip ‘walk angle’ for various roof slopes:
36:12 -> 25 7/16 : 12 (64.74°)
12:12 -> 8 1/2 : 12 (35.11°)
10:12 -> 7 1/16 : 12 (30.48°)
8:12 -> 5 11/16 : 12 (25.36°)
6:12 -> 4 1/4 : 12 (19.50°)
4:12 -> 2 13/16 : 12 (13.24°)
2:12 -> 1 7/16 : 12 (6.71°)
1:12 -> 0 11/16 : 12 (3.37°)
And here is “triangle 3” (angle to leave on metal hip when cutting bottom):
36:12 -> 37 15/16 : 12 (72.45°)
12:12 -> 17 : 12 (54.78°)
10:12 -> 15 5/8 : 12 (52.48°)
8:12 -> 14 7/16 : 12 (50.27°)
6:12 -> 13 7/16 : 12 (48.23°)
4:12 -> 12 5/8 : 12 (46.45°)
2:12 -> 12 3/16 : 12 (45.44°)
1:12 -> 12 1/16 : 12 (45.15°)

Roofing Types Ranked

Roofing Types, Ranked

After over a decade of service, we provide you a bird’s eye view of our opinion of roof options.

#1 Slate.

There’s no way around it—if you have the budget, real stone slate from a North American quarry looks stunning and should last over a century.

#2 Standing Seam Metal.

This option is half the cost of slate, but can still last 50 years, looks amazing, and is quite reflective, leading to reduced cooling costs. It’s also recyclable at the end of its life.

#3 Copper.

A copper detail dormer can exceed slate’s unit price in some cases, but can also potentially outlast normal metal, and can provide a nice aesthetic.

#4 Asphalt Shingles.

This is the go-to option for most, is pretty durable for a couple decades+, and is more economical.