What is the correct drip edge overlap for shingles

Peter683

Pat, we are in sarnia lambton

Roofmaster417

Hopefully they covered the entire roof with felt.

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Peter683

I don't think so..

joecaption

Got me worryed now.
If they only used tar paper up the lower part of the roof, what did they use on the rest of the roof.
I'm shocked it's not code to use Storm and Ice up that far north.
One of the more common issues with roofs is with ice dams,

Peter683

I can't say if they did or not Joe as we werent watching them all the time .. something tells me know.. We did use it on the whole roof on the garage.

Roofmaster417

Hmmm,if you have plank decking on the house you should be able to tell if felt was used with a flashlight.Just shine it between the boards.Felt looks different than the shingle back.

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PatChap

Not required here to paper the whole roof. Should have been at least offered to you, however.

joecaption

Now that's just wrong.
I would not every think of doing a roof without felt

PatChap

Just a regional differance. I find more then just one course of paper on maybe 5-10roofs a year that I redo.

jagans

Thats right, One knuckle for both the starter course and the first course, past the Break in the metal drip edge, which is enveloped in Ice Dams, of course.

Thats an inch unless you are Abe Lincoln.


Whaaaaa No Felt????? You must be Yanking My Chain, Yes?

Joes Right, and make that ASTM D226 Type 1 Felt, at that. And it aint "PAPER"

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PatChap

Ontario building code isn't online, but here's a link to a ruling relating to the eave protection code. Scroll down a bit to 4 *provisions of the Ontario building code*. Is related to the 1992 code, only change has been that cementing 2 layers of 15 together is no longer allowed, #30 min now.

As I said its just a regional difference.
http://www.mah.gov.on.ca/Asset7749.aspx?method=1

If you'd like to see the newer code, I can take a picture of the current code book tomorrow.

747

It depends on the roofer. At least 1/4 inch. For a clean look. Let them overhang. Then once roof is completed. Snap a chaulk line and cut all at once. Some roofers do it like this others cut as they go.

jagans

No, it does not "depend on the roofer" Its one inch, +- 1/4 inch.

Geezzz.

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Roofmaster417

I probably did a good 75 roofs last year with no felt.Most were steep but a few lower slopes in the mix and none were leaking.Nothing in the valley's and zero leaks.

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Roofmaster417

Interesting.

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