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walkereng
walkereng, Consultant
Category: Structural Engineering
Satisfied Customers: 2513
Experience:  Over 30 years of Structural Engineering experience.
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Shingling a roof. The roof isn't square. How do I lay

Customer Question

Shingling a roof. The roof isn't square. How do I lay straight chalk lines?
Submitted: 1 year ago.
Category: Structural Engineering
Expert:  walkereng replied 1 year ago.

I can help

Customer: replied 1 year ago.
Hi
Expert:  walkereng replied 1 year ago.

Off course, you have to start at the eave of your roof with your shingles and lay out your chalk lines parallel to your eave and work your way to the ridge.

Any un-squareness will have to be taken into consideration at the ridge, when you put the ridge caps shingles on.

Customer: replied 1 year ago.
Don't my chalk lines need to be square?
Expert:  walkereng replied 1 year ago.

Your chalk lines will be square with the your starting point, the eave, and will be square to each other all the way up to the ridge.

The only part that will not be square is your last chalk line relative to your roof ridge.

Customer: replied 1 year ago.
This roof isn't square. I was going to measure the ridge then divide by 2. Then measure the roof at the eves and divide by2 then snap a chalk line then using a t square to snap a chalk line parallel to the ridge
Customer: replied 1 year ago.
Then start the 6" chalk lines
Expert:  walkereng replied 1 year ago.

You really just need keep the horizontal chalk lines parallel to your eave and the trim the edges as you go.

I guess I do not know the actual extent of the roof not being square, can you give me an idea?

Customer: replied 1 year ago.
I'll take measurements
Expert:  walkereng replied 1 year ago.

Ok, let me know. No hurry.

Expert:  walkereng replied 1 year ago.

Let me know when you come back online.

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