Yes, you need drip edge to kick the water off the roof and into the gutter. It can probably be retrofitted.

It looks like they had the lower most shingles bend downward into the gutter past the sheathing... I take this is lazy and not OK?

Drip edges are also very useful in dissuading Rocky Raccoon from simply lifting the last shingle and

digging in.

What do the drawings show?

Thanks for the replies. I'll post a few 'during construction' photos, for fresh ones I'll have to wait for daylight.

Luckily my home is a 2-story with no mature trees nearby, but who knows perhaps a raccoon can scale hardieboards 30' high!

The drawings that I received don't include detailed drawings for things like the roof, plumbing etc. Only layouts of the home and location of lights/light switches etc. Convenient right? When I inquired I was told this is what I get.

Also do you need drip edge guards along the rakes? Or just between the last shingle and the gutters?

The international residential code has required drip edge flashing on all edges of the roof since 2012. IRC R905.2.8.5. Some states may have specific rules that relax the requirement. Do a search online for your state.

The 2019 Residential Code of Ohio adopts the 2018 IRC with amendments and appears to have removed the drip edge requirement and refers back to general flashing and weather protection sections that say nothing about roof edges.

https://up.codes/viewer/ohio/irc-2018/chapter/9/roof-assemblies#9

I don't care what the code says, those unsupported shingles in the pictures are going to bend and fail. Awful.

RES2, as I read those code provisions, particularly 903.1, it defers to the manufacturer's requirements for the roofing installation. Therefore my interpretation is that if the shingle manufacturer requires a drip edge for their system, then it is also required to be code compliant.

Cobalty, who was the manufacturer of your shingles?

Also, this may vary in this particular instance dependent upon the actual code language, but you are typically bound to follow all codes under which have jurisdiction in your area. That would mean both the state code and the local code. Where codes conflict, the more stringent must be followed. So for instance if the state of Ohio required drip edges (and RES2 appears to have pulled up language that suggests their requirement is not as black and white), but the county does not, then they would still be required.

Similar to what Joseph has said, I find this to be an unwise place to cut back on construction. Drip edges cost how much, and how much more to install? Where else has your builder cut corners in order to save pennies?

Yes I worry about what other “surprises” will show themselves later.

I think my shingles are already bending downward on my bump out. I’ll take a photo after work.

The issue of codes and manufacturer instructions is relevant only if you're trying to force the installer to add drip edging at no additional cost or at a discount.

Whatever you goal, its essential for the longevity of the roof and facia boards that metal drip edges be installed to the existing roof. It's not easy but its certainly possible. However, you might want to use a different roofer.

https://www.protradecraft.com/video/drip-edge-installation-existing-roof

So they tried to alleviate the issue of no drip edge by overhanging the shingles so far as to help keep the water into the gutter.

I’ll try and post photos, shingles already seem weak and separating. Roof isn’t even a year old.

Overhanging the shingles is the classic workaround for missing drip edge. If they overhang by too much it is hard on the shingles and they can fail. My builder's roofer did the exact same thing to us even though drip edge was written in the contract. They tried to convince me it was fine and I REALLY wish I had not given in.

Having a drip edge was not required by my city's building code when my roof was done. It is required now. Had the drip edge retrofitted and rotten fascia replaced recently. You really need to get that drip edge put on. That will save you lots of trouble down the road. Also, should add here that if you have an asphalt shingle roof, make sure this work is done when it is warm and sunny. Then your shingles can be very gently lifted without cracking as the drip edge is worked into place.