Ice and water question

I'm a PM and have a crew doing a roof. Hopefully I can get some answers to these questions, and please don't say "ask your roofer", since I want your answers.

The roof is a 7 pitch and planning to run 3 ft of ice and water along each long side. Shoul>>>

Sorry I didn't word it well. Egg did; "At the bottom eave (as opposed to the rakes) if you're going to sandwich a drip edge between one narrow and one full-width layer of I&W, why not follow basic roofing technique and put the full on the top so there>>>

TRG, you said, "...if no dripedge,we leave 1" at the rake-never a problem" That is a fact and glad to hear you say it. GAF is trying to cut off the bull's horns (and other things anatomical parts) with a PR blitz that says otherwise. I find GAF>>>

I'm confused. Are you saying take an 8" strip of Ice and Water at "bottom" near fascia, then Drip Edge, than a 3' piece of Ice and Water over the Drip Edge, or are you saying place 3' of Ice and Water, then Drip Edge at bottom, than 6" strip of dri>>>

River Rat Dad wrote: [quote]Do you have codes that dictate anything with respect to ice shield? In MI the code requires ice shield at the eve to a point 24" inside an exterior wall. That often means more than 3 feet here. If an open front porch is>>>

Do you have codes that dictate anything with respect to ice shield? In MI the code requires ice shield at the eve to a point 24" inside an exterior wall. That often means more than 3 feet here. If an open front porch is 6 feet deep for instance you would>>>

"Apply 8" drip OVER the Ice and water at eaves and gable ends."

If you put the 8" strip on first, then the DE, then the 3' piece, there isn't a seam. Rakes?? Sounds OK to me. I don't bother.>>>

Here is my original post: I'm a PM and have a crew doing a roof. Hopefully I can get some answers to these questions, and please don't say "ask your roofer", since I want your answers.

The roof is a 7 pitch and planning to run 3 ft of ice and water a>>>

I am not sure about the introduction of Grace Ice & Water Shield nationally, but as far as their Bithuthene product line...bituthene 3000 was a .060 mil product used more as a seperator. In 1974,My specific use for it was to wrap some 12x12 structrual>>>

This is a good one. As you can see, I&S was used and will last forever, or nearly so. This is a fairly new installation. >>>

Egg - Nice drawing.

TRG - Are shingle roofs still being installed by some with staples? What makes 15# felt more breathable than 30# felt?>>>

The valley in the previous post and this picture are of 12" materal. No hemmed edges, no cleats, no caulk, no I&S, no felt under the valleys. Look at the water tracks. Even though we often get 20" of snow in one storm, and tropical rains at times, see h>>>

[quote]by the way...I have been using Ice & water shield (Bithuthene) since 1974, so it's not a new product, comparatively speaking.

Grace brought out their product in 1978 and I thought they were the first in the market. At least they were in m>>>

Well put egg and TRG. I've never bothered with a sealant. I have sandwiched DE with I&S.

Jeff. When I was doing lots of shingles and reps were at the shop weekly for Tamko, GAF>>

TRG, we don't have any disagreement about the sealant that I can see. Also, your treatment at the lower eaves is exemplary imo. Bullet-proof actually.

Nice post builderr.

Jed, I don't see I&W as an all-or-nothing proposition. Upgrading from a single>>>

TRG - I've never heard about the baking thing. I like 30# felt because it doesn't tear as easily as 15#. Also, it would allow me to differentiate myself from the competition not unlike guys claiming that hand nailing is better then gun nailing. It's>>>