I also just realized that it's been a month since I got the original lumber delivery for this shed! So here's how we're doing as a whole one month in from delivery.
The first sheet of OSB is officially on the roof! 🥵
Final progress for the whole weekend. We're about half done with the sheathing, then I need to go shopping for shingles.

Climbing the learning curve on applying zip system flashing tape this morning. Glad I started on the walls and not the roof.

And before you ask; yes, I rolled the tape. #zipsystem

Two rows of roof sheathing done. Just one more full row and a three foot row left before we are officially working on the roof itself.
Roof deck complete. Now I just need to paint the rake and fascia boards, tape the seams, drip edge, felt paper, rake flashing, and we can start laying down shingles.

T-50 staples weren't cooperating going into the OSB, so while my gun isn't technically rated for them, you ARE able to buy 3/8" narrow crown staples. Short enough to not poke all the way through the 1/2 roof decking, but rigid enough to not be giving my any trouble stapling the insulation baffles to the bottom of the roof deck.

These baffles are because I'm doing a vaulted / cathedral ceiling in here, so this guarantees an air gap / path between the ceiling insulation and the roof decking. This allows air to flow from the lower soffit to the upper soffit to transport away any moisture that accumulates in these rafter bays and keeps the shingles cooler by having circulation behind them.

Second evening finishes out the baffles. Just punching things out in prep for shingles.

We are getting tantalizingly close to laying down the roof! All of it fits nicely in my pickup too.

Doesn't look too bad when it's all neatly piled on the ground. I'm sure I'll be fine and this part will be easy.

I'm shooting the trim paint on the fascia and rake boards before doing the roof. I figure it's easier to paint it now before I put the drip edge over it.

The dog only got lightly misted with white paint. She still mostly looks black.

Got all the roof seams in the OSB taped. Trying not to think about the fact that just this was $100 worth of tape.

Taking a break from the roof to stay out of the sun, you can get this disodium octoborate powder which you mix with water and spray on your bare studs before closing them in to prevent termite damage.

Am I really convinced this will make a huge difference? Not really. But for $13, it's pretty cheap insurance. And it isn't a question that we'll get termites in here; just a question of how fast and how bad.

Some people also just use Borax for the same thing, but structurally tetraborate and octoborate are different enough I figured I'd splurge for the real stuff.

So I put down the two rolls of asphalt paper that goes under the shingles. On steeper roofs, you can get away with just the zip system coating, but since I'm building only a 3/12 pitch roof, I need two layers of underlayment, so I can count the zip system as one, then put down 30 pound felt paper as the second.

Would you believe how much I came up short? I guess I'm going to buy a third roll, for the last nine freaking square feet.

Day one of putting shingles on the roof. I got through four bundles before the sun really came out and I called it quits.

Key take aways:
1) the part that wreaks you is carrying the 70 lb bundles up onto the roof. For larger projects, definitely worth getting the shingles delivered directly to the roof.

2) the little 1 gallon 0.5scfm trim compressor I own is able to keep up with one rookie shooting roofing nails absolutely no problem. Glad I didn't go buy/borrow/rent/steal a larger compressor for this project.

3) I'm definitely just paying someone to reroof my house when it comes time. My dad was freaking crazy when he replaced the roof on his house back in his prime. I, also, am past my prime.

I keep rereading the installation instructions, because this stairstep pattern I'm getting seems really wrong, but this seems to be what GAF says....
Everything hurts, but I've got nine bundles on the roof. Probably one more morning of work, then a trip to Home Depot if I really do end up short a bundle like I suspect.

You know how I came up 9 sq ft short on asphalt paper?

You will not believe how much I had left to do when I ran out of shingles tonight.

And we are done with the roof! 370 sq ft single slope shed roof with no penetrations. GAF HDZ shingles, pewter grey.

I never did find any manufacturer documentation about how to terminate the top of a single slope, nor reach out to customer service about it, so I ended up just winging it with some 3"x2" drip edge on top of the top course, with asphalt cement on top of every nail.

Now we restart at the ground and work our way back up to the eves with siding and trim.

Wide angle shot of where we're at with a finished roof.
Today was the final push to the end on sheathing. I... dropped the nail gun and broke the magazine before we could finish. So we called it quits, and I need to figure out how to fix this framing nailer.

In the interest of preventing water intrusion under the wall, I used a diamond wheel on my angle grinder to cut a groove in the concrete, then set a strip of flashing into a bead of wet sealant in the groove.

For my next shed, I'm just going to build it on a raised foundation. This sucked.

The door for the shed has been delivered. Now I just need to unwrap it and slide it into the opening, right?
All that work putting OSB up on the walls, and now I have to go cut big holes in the side for windows? 😬

YES! I finally found a sheet metal shop who was willing to bend me the eight sticks of a custom Z bar profile I needed for the kick trim around the bottom of my shed.

Art's Sheet Metal Mfg. Came in with a post-it note drawing of what I needed, they pulled out their sample ring of thicknesses, and asked "do you need this this afternoon or tomorrow?"

$80 for 80 feet was practically off the shelf retail price, so we are finally unstuck on the siding.

Finished the flashing and zip tape around the perimeter of the wall today. I cut a groove into the concrete, then wet set the flashing into some sealant in the groove and zip taped the top of the flashing. So I'm really hoping this helps prevent any water coming in under the wall.

On top of this goes a PVC trim board, the Z flashing I've had so much difficulty finding, and then we can finally get started on the trim and siding over the OSB.

My shed finally has a door knob. Another awful fiddly bit that I hate of the whole fiddly bit that is hanging a door that I also hate.

So this is where we're at at this point.

Next things on the list is boxing in the soffits, trim along the bottom and all the edges, two more windows on the back wall, then we can start hanging horizontal lap siding.

Then lots and lots of work on the inside.

The soffit vent for the lower eves has been put in. The rest of this surface gets closed in with 1/2 ACX plywood, and this perforated vent allows air to flow up into the eve, across the bottom of the roof sheathing, and out a similar vent in the top eves. This will keep the shingles significantly cooler and give any moisture in my ceiling cavity a path out of the building.

These vents are also not straight. Because the fascia boards aren't straight. Because the rafters weren't straight. Because one of the walls is slightly crooked. And I just need to come to terms with the fact that this shed is still going to look really good when a normal human being looks at it.

Finished boxing in the upper soffit. It isn't perfect, but it's up high, and nothing some caulk and trim won't be able to hide later.

Still better than fighting with beauty boards and roofing nail punch though and block vents, etc etc etc.

The 8' sticks of soffit vent were about $25, plus all the boarding is just ACX plywood.

Normally you wouldn't have an "upper" soffit, but would have ridge vents in your roof. This only exists because I'm building a single slope "shed" roof to maximize the number of solar panels we can add later.

Today is another "cut big holes in a perfectly good shed" day. Hopefully I'll get the last two windows hung tomorrow.

Got all of the trim and a bit of the siding delivered for the shed.

The delivery guy actually remembered me from when he dropped off the original lumber package a year ago and the first words out of his mouth were "wow! You did it! That shed is looking great for being your first building"

😁 So work continues.

Figured it would be easier to paint the trim on the ground before mounting it to the shed than up in the air later.
While boxing in the soffit, I'm wiring in a plug for Christmas lights to a light switch inside.
Trim is coming together like I hoped. The siding then sits between each stick of trim. Got about 2/3 of the trim up today.
Previously I've been running all the power tools off an extension cord running from the house, but now that I've got an EcoFlow I'm just using that instead! It's handling all of the tools like a champ. The only thing it's struggled with is the miter saw; needed to turn on X-boost to use that saw without tripping the over current protection.
And that's a wrap on the trim! Now I need to get some custom Z flashing made to flash out the top of all the trim, then we're on to finally putting siding on the shed and calling the exterior finished.

I chickened out and only ordered a bit of the siding so I didn't have an ENTIRE sheds worth of siding dropped in my front yard all at once.

I'm still optimistic about this red color. ❤️

One of those fun stages where I need to predict every single place where I'll want electrical on the outside of the shed and put the box blocks in now. And hopefully not miss any.
You would think that shooting a nail and hitting other nails behind it would be a one in a million, but it's happening shockingly often.
First two pieces of siding officially on the wall. Now just rinse and repeat for the entire shed.
My dad came down and helped me out. These 12' pieces are just incredibly awkward to measure and nail in place by yourself.
Next batch of siding delivered and painted. More of the same.

Been a bit of a gap in progress, but finally got my dad back down and we got most of the largest wall done!

I absolutely love the color; no more doubt.

It's incredibly slow progress, but I keep chipping away at it a few hours at a time and we're almost done with the siding on the largest of the walls.

Dad came down and helped me finish the highest wall, so that's 2/4 walls completely done and a good start on the last two.

One more good day and we very well might be done with siding!