Hip roof question for you roofers out there

[BRULEDRIFTER]

When installing ice/water barrier and felt on a hip roof I "wrap" over the "hip ridge" and then use a hook blade to cut back the shingle and not damage the felt or ice/water barrier underneath. I have also seen people just use a regular blade and end up cutting the felt and ice/water barrier along with the shingle thus defeating the purpose of overlapping the two. Now I know it's covered with the ridge shingles but you no longer have a complete barrier in your felt or ice/water. I used to wrap felt over the regular ridge also but with a lot of people using ridge vents now that is kind of moot. My main question is does cutting through these layers still meet code or most manufacture's install specs? I know I would certainly rather leave it in tact but does cutting through it still meet code?

[Roofer]

there is no such code that I have heard of. If you cut through the I&W it's no big deal. It is made to seal back up. The main reason for tar paper is that 1.it prevents a leak if you have shingles blow off until it is fixed 2.Prevents shingles from sticking to the sheathing 3.somewhat keep the house dry until it is shingled. On your hips, don't even worry about cutting it. You could leave it without ridge for a whole year and never see a drop inside your house.

The #1 code in MN right now is that you have I&W up to manufacturers specs.

[sparcebag]

Why not cut the shingle first then nail it down??

[Surface Tension]

Snap a line and cut them all at once with a hook blade.

Nothing gets touched but the shingle, snapping a line and cutting all at the same time gives the ridge line a straight and equal surface for the ridge cap to roll over on.

[BRULEDRIFTER]

Surface Tension, That's exactly what I do. I guess it is over kill to leave that ridge felt in tact but I figure why not.

[Surface Tension]

What gets cut off and is usable gets used on the other side or ridge cap.

This would be the same for gable ends. Snap a line, cut with hook blade then take the salvage to the other side.