Vertically laid roll roofing?

[Denray]

I can't remember seeing mod bit laid out vertically on a low slope. Is that OK?

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[John Kogel]

It is not correct, but because it is torched on, it won't leak for a long while. A house I drive past every day has it laid that way.

I had a low slope roof about a month ago that was lapped backwards, the uphill strip laid first. Is it the fumes they breath all day??

[Bill Kibbel]

1. Let's try to avoid calling it roll roofing - that's a different product.

2. Several manufacturers allow it to be either perpendicular or parallel to the roof incline.

3. Some require it to be one or the other, depending on slope.

[Denray]

Thanks guys!

[Edward Peterson]

It is torched, that way it won't leak for a long while.