reducing shingle exposure

tomstruble

Gentlemen
Im looking at a small roof replacement.It a 12x17 approx 4 pitch it has 3 sky lite with maybe 5-6'' in between the units my question is would you cut the shingle exposure to 4'' on a roof like this?
The roof terminates at a stucco end wall with a dbble window about 6'' above the roof line,the end wall flashing is heavy ga aluminum .there is a vented soffit but no end wall venting would that shingle over vent work at the top end wall?The sky lite units are large about 3'x3' the homeowner wants to replace any manufacturer preference?

Grumpy

That's an old school method which pretty much died out with the popularity of ice shield. Infact when speaking with manuf reps they say it'll void their warranty. You're better off ice shielding the entire surface first before reducing an exposure.

For a wal vent, you may try the Air Vent, Flash-Filter vent. I have used it before.

I prefer velux skylights. Theyt will do custom sizes in some of their product lines.

__________________
-Grumpy
Chicago Gutters Chicago Roofing

tomstruble

thanks grumpy.p.s. your right i did go to the old school

tinner666

I use i and W, then reduce the exposure. I have a couple of trouble free Elks on 4" and 5" exposure.

The manufacturers know the shingles are worthless and want to RELY on the I&W, not the roof.

This is a 3/12 the GC insisted I shingle on HIS house. Elks at 4". with I&W, and 'Dutch-Lapped' 4" tp 6". No butt joints. 9 years old. Up to 17" of snow. http://rcs.si-sv2628.com/show_album_...&file=1976&s=0

I love Elks at 5". The sealer strip lands on the flatest part of the shingle.

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SLate Roof Repairs, Richmond, Va.
Contractor Domain Name Sales Yes, I Sell them.
DIY Roof Help Richmond, Va.
Tinner666
Window Flashing Tutorial

tinner666

I should have also mentioned this job. It's GAF or GP. I forget.
Fully Dutch-Lapped and the exposure went from full down to about 3-3/4" in keeping the lines straight. The Reps also came to the job several times and I'm sure they have their own pics stored somewhere.

http://rcs.si-sv2628.com/show_album_...8&file=764&s=0

I have been certified by all of them at some time or another. Fancy toilet paper. They all know I think their product is crap now!

__________________

SLate Roof Repairs, Richmond, Va.
Contractor Domain Name Sales Yes, I Sell them.
DIY Roof Help Richmond, Va.
Tinner666
Window Flashing Tutorial

tomstruble

so Frank you do reduce exposure with i&w ? and could you please explain dutchlaped shingles? thanks tom

Ed the Roofer

Overlapping the butt edges of the shingles by 3" to 6".

They used to make 3 tab shingles look like architectural shingles before any architecturals were ever made.

Franks measurements may vary. He's a wild man with asphalt shingles.

Ed

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tinner666

No butt joints Tom. I did that to my own house.
I was going to make it rougher looking with 3" to 6" random tabs all over the place, but that got old in a hurry. So, I decided to save that for where I found joints in the 1x6's. When I found a joint in the nail line, I face nailed about 1" lower and slid tabs in, nailed about the nail line, with a tiny dab of caulk on the nail to act as a seal down.

Finished the roof the day before the hurricane and it hadn't even sealed when the hurricane hit.

Attached Images

	Dutch-Lapped Roof4.jpg (95.2 KB, 3 views)
	Dutch-Lapped Roof3.jpg (76.2 KB, 0 views)

__________________

SLate Roof Repairs, Richmond, Va.
Contractor Domain Name Sales Yes, I Sell them.
DIY Roof Help Richmond, Va.
Tinner666
Window Flashing Tutorial

tinner666

Ed's right about the 3-tabs. Another thing was that I wanted a dimensional roof on my house. Elks and Timberlines butted look almost as flat as a 3-tab.

Some of my stuff was learned by................................................ ................................................. 'JackLegs'!
Over the tears, I've seen many lapped edges and walls instead of cut shingles. Looks like crap to me. BUT, no leaks occurred!

The reps used to come to the shop and we'd sit around for a few hours discussing techniques, pros and cons. I've even done 'special order' jobs for some of those GAF, Certaineed, other reps.

Concenus was; Lapping was good at times, increased headlap, and never caused leaks.( I wouldn't thing of doing that on a 3-tab).
A lapped Elk has 8" of headlap!.

Used a water hose on one, from the side, The water that squeezed through had an uninterupted trip down and out, without any sideways travel, since the lap created a 1/8" trough.

Ed knows me by now. I use I&W, but don't rely on it. Too many now RELY on it! Properly done, even a large storm won't make a roof leak if it's done over planks without underlay. Installation is the biggest cause of call-backs, not lack of I&W.

__________________

SLate Roof Repairs, Richmond, Va.
Contractor Domain Name Sales Yes, I Sell them.
DIY Roof Help Richmond, Va.
Tinner666
Window Flashing Tutorial

tomstruble

oh yes i get it thanks i like the roof, looks more wood shake like