reducing shingle exposure

tinner666

Yes it does. I get requests to do the same for others. Adds about 30% more labor. You wouldn't believe how much trouble it is keeping track of laps, nails, patterns, etc.

I learned fast to leave both shingle ends un-niled until I had decided whether the adjoining shingle should go under or over! To keep the humps from growing, I tear off any 'double-lams' that are on the shingle I'm laying on top of. Gets kinda crazy!

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Tinner666
Window Flashing Tutorial

tomstruble

i can also see how dutch laping away from the valley is a good idea do you always weave your valley?

Grumpy

I'm the kind of guy who does it like the manufacturer says to do it so if there is ever a failure of any kind, I have my butt covered. I wouldn't dutch lap or reduce exposures without written permission from the manufacturer.

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-Grumpy
Chicago Gutters Chicago Roofing

tinner666

Not always Tom. It requires laying out the shingles all over the area to soften first. Even to Cal-cut one, 1/2 of them need to be laid out to soften.

Manufacturer did sign off grumpy. They always do. Not that it matters,IMHO. They're going to duck any responsibility if they can. I've been around that tree too.
FWIW, no tech that writes that crap has ever been on a roof and hasn't a real clue.

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Tinner666
Window Flashing Tutorial

tinner666

PS- 5" exposure on Elks makes the water drip off from one to the other, along with the better seal down properties, instead of wicking so bad.
Butt joint allow a LOT of water between the shingles. Sometimes, they get overwhelmed and leak there. I fixed many of them too.

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SLate Roof Repairs, Richmond, Va.
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Tinner666
Window Flashing Tutorial

Grumpy

Agreed and agreed, but when I sit in a court of law and say "Your honor I installed it exactly as the manufactyrer stated in good faith that they know how to install their product." The point is I want limited liability should there be a failure of any kind. If youa re getting the manufacturer to literally "sign" off that's great. If you are getting a verbal "Um yeah that should be ok", I pray for you.

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Chicago Gutters Chicago Roofing

tomstruble

this is the roof that im looking at sno on the roof but you get the idea.She wants to change out the sky lites and re do the roof,i was hoping to get some venting at the wall but that hard coat stucco scares me and the left side of that window dont look to good any advice?

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tinner666

If possible, I'd make single a U shaped, (With squared bends, of course), piece of flashing to fit between the 2 skylites. Make the top wider than the bottom for a loose fit at bottom, (1/2" total play is OK, it won't bind in hot weather.) I also believe, I'd make a pan that extends all the way from one end of thoase skylights to the other. Any joint in the center will be headed for trouble! A single pan could also be 'notched' and folded to allow water down the middle without harming the integrity of the back pan. With or without the notch, that's the weak point. On reflection, I'd turn up 8"-12", and at the center, use the'extra' metal to literally close/cap the weak spot off. That would be first choice. There would be a small 3tablespoon bed of caulk at the 2 outside corners and one crossing the open to set the pan into.

More in a moment.

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Window Flashing Tutorial

tinner666

For stucco specifics, go here http://www.your-leaking-house.com/sites/your-leaking-house.com/forum/index.php and ask Carl Brown.

Me, I'd bust the stucco out at least up to the bottom of the window and install a pan or other flashing so the water can exit the wall. Then, I'd get some wall-vent and install it. (I saw at least 1 dutch lap on that roof! )

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SLate Roof Repairs, Richmond, Va.
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tinner666

Agreed again grumpy. But the metal book says to cut the panels off and add Z-bar. Screw that. I bow fold and then add a Z-bar, or sometimes a locking strip attached across the ridges and a ridge locked to it.

Their stated reason? Nobody will take the time to do it right. That's why my bids seem to have no relation to other bids on many jobs.

Same for the shingle suppliers. Like I said we used to hang together and hash ideas, causes and effects for hours.

Did you know they claim that bending a shingle to nail under it will crack most of the fibers? If it isn't lifted with an almost straight lift, as opposed to a 'decent' bend, that one just got ruined.

Anybody seeing this thread and not in the know, grump and I aren't arguing, we're discussing and debating this.

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SLate Roof Repairs, Richmond, Va.
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Tinner666
Window Flashing Tutorial