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Roof Question Today At Work?

 
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Old 04-18-2014, 04:40 PM   #1
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Roof Question Today At Work?


PLEASE forgive me, I KNOW that this has been addressed before, and will be more! To start with, I have done many roof jobs from past employment/own company/side jobs, over 30 + years, with no issue!

Today, my Project Manager where I work, ( fyi, I am classed as a "lead/carpenter tech". title with no say, just the BS involved!) came to me about a sub doing a roof for our company. Now for the question??

When doing a roof up the eaves, do you paper, then drip edge, then shingle, with the edging shingles, OR drip edge, paper, then shingle?

And as well, Do you roof apron, I/W then shingle, or I/W then roof apron, then shingle?

Not telling how I do it yet, but we have a bet at work on it! He is from the S.C. area, I was born and raised in the Pittsburgh area!

Ps I do maybe the wrong thing, let me know, paper/drip/shingle and I/W roof apron/ roof cement on top of apron/ shingles. Thanks, dave
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Old 04-18-2014, 04:53 PM   #2
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Re: Roof Question Today At Work?


I go over the drip at the eave two rows min. of I&W.

under drip at the rake.

A vertical row on eave isn't a bad idea if a high wind area,,

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Old 04-18-2014, 05:25 PM   #3
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Re: Roof Question Today At Work?


As far as I&W.... Manufacturer states for it to be applied BEFORE drip edge. Reason being an ice dam can be formed creeping under the drip edge, so there needs to be protection under the drip edge.

As far as felt paper.... Paper first, then drip edge (if any) along the rakes. Felt serves more as a vapor barrier than anything else. If wind driven rain were to be forced under the shingles, it could occur at the rakes so having paper overlap the drip edge could force it under the paper. With paper under the drip edge, the sheathing is still protected.
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Old 04-18-2014, 05:36 PM   #4
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Re: Roof Question Today At Work?


This is our way
Ice and water up eave at least 3' past house wall
Drip edge or gutter apron over ice and water
Felt or synthetic over ice and water and over drip
We have put ice and water both under and over the drip in bad ice damn areas
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Old 04-18-2014, 08:43 PM   #5
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Re: Roof Question Today At Work?


Per manufacturer's instructions:

http://www.gaf.com/Residential_Roofi...ish_French.pdf

http://www.gaf.com/Residential_Roofi...structions.pdf
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Old 04-19-2014, 03:19 PM   #6
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Re: Roof Question Today At Work?


Ice guard and felt under drip.

Ground pins go down.

Floor before base.

Cabinets before floor (sometimes).

Fiber tape on seams only with setting type compound.
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Old 04-19-2014, 03:27 PM   #7
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Re: Roof Question Today At Work?


around here the I&W wraps the eave fascia 3''very rare to see an eave drip/apron..you would think there would be problems but there's not
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Old 04-19-2014, 04:30 PM   #8
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Re: Roof Question Today At Work?


Imo drips are over rated.
I would stick my ice over the drip, & my drip over the paper on rakes. That's me.

Bottom drip caps are supposed reduce overhang & cracking, as well as provide easy gutter access.
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Old 04-19-2014, 04:36 PM   #9
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Re: Roof Question Today At Work?


2 rows of ice and water, then titanium underlayment. Drip goes on as you shingle.
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Old 04-19-2014, 08:03 PM   #10
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Re: Roof Question Today At Work?


Quote:
Originally Posted by Tom Struble View Post
around here the I&W wraps the eave fascia 3''very rare to see an eave drip/apron..you would think there would be problems but there's not
That's how I prefer to do it, 'wrapping the eve fascia' (its how I did my home) then the drip edge or gutter apron metal over it.

If limited money involved ( customer house ) then leave existing gutter apron and seal ice and water shield to flashing.
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Old 04-24-2014, 08:34 AM   #11
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Re: Roof Question Today At Work?


We have been applying I&W per code (over the drip edge) for years. We just had the worst winter in 40 years and had no problems.
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Old 04-24-2014, 10:24 AM   #12
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Re: Roof Question Today At Work?


Quote:
Originally Posted by MJW
We have been applying I&W per code (over the drip edge) for years. We just had the worst winter in 40 years and had no problems.
Show me this code?
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Old 04-24-2014, 12:03 PM   #13
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Re: Roof Question Today At Work?


1/2 sheet for the first row under the eve, then full width over the drip. Rake metal goes on top of felt/underlayment.
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Old 04-24-2014, 01:26 PM   #14
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Re: Roof Question Today At Work?


Here in Fl we I&W the whole roof normally. So most of the time it's I&W then drip. Run a line of tar to seal the drip or peel & stick starter.
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Old 04-24-2014, 01:38 PM   #15
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Re: Roof Question Today At Work?


Quote:
Originally Posted by SouthonBeach
Here in Fl we I&W the whole roof normally. So most of the time it's I&W then drip. Run a line of tar to seal the drip or peel & stick starter.
The whole roof? Ugh I guess you're not worried about breathability of the roof decking?

Last edited by LeeFowler; 04-24-2014 at 03:31 PM.
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Old 04-24-2014, 02:33 PM   #16
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Re: Roof Question Today At Work?


Quote:
Originally Posted by LeeFowler
The whole roof? Ugh I guess yours not worried about breathability of the roof decking?
or the cost to replace the next roof
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Old 04-24-2014, 11:18 PM   #17
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Re: Roof Question Today At Work?


Quote:
Originally Posted by jlsconstruction View Post
Show me this code?
MN code. We MUST supply photos for inspection.
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Old 04-24-2014, 11:20 PM   #18
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Re: Roof Question Today At Work?


The roof breathes through the ventilation. OSB or plywood decking does not breathe anyways, aside from the seams.
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Old 04-24-2014, 11:53 PM   #19
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Re: Roof Question Today At Work?


Quote:
Originally Posted by MJW
The roof breathes through the ventilation. OSB or plywood decking does not breathe anyways, aside from the seams.
I could be wrong and I often am but I don't think that statement is correct.
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Old 04-25-2014, 12:04 AM   #20
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Re: Roof Question Today At Work?


Quote:
Originally Posted by MJW View Post
The roof breathes through the ventilation. OSB or plywood decking does not breathe anyways, aside from the seams.
They both breathe, you can check it in permeability tables.

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