charmin35
Well-known member
I've been marinating on this project, in one form or another, for almost a year now. Today I finally broke ground (well... my concrete contractors did) and I am absolutely excited, and nervous, but also just relieved to finally begin to shape it into reality.
Breaking ground
I bought my home last year and I was already planning a shed/workshop before I closed on it. I flip-flopped on different sizes, and made so many versions of 3D models over many months, until finally I was set on a 12x16 size with a little transom dormer. I priced it out to an estimated $3,500ish.
I decided to do a 'test run' and I built a small 8'x4' garden shed. That was a good learning experience, and let me get the damn lawnmower and other tools out of the house (aka my office, formerly known as The Shed'). Pics of that build here: https://imgur.com/a/N35mlqs
Over the winter the project went into hibernation, but about a month ago the desire came back strong. I got HOA approval about a month ago, and I almost started the Town permit for it. Long story short, I flip-flopped again, a few dozen more times, and decided I would not be able to "grow into" a space this small over the next few years.
So I thought if I go bigger, I should do a concrete slab, so my initial thought was 16x20. Then I realized I might as well do 16x24 since it fit the space and the yard just the same. This feels like a good size for me as a newby woodworker who doesn't even have a lot of the more interesting tools yet, and fits well with my home in the way my kitchen window looks out in the yard, (i.e., we won't be staring at a white vinyl siding corner when we look out). There had to be some upper limit to what was reasonable for what I am trying to do, and this feels right. Maybe future successful me may have a different house with a big shop.
Got some concrete quotes at ~$4,000. Yikes, didn't realize it was so expensive. Materials for the structure will probably be another $4,000. Flip-flopped a few more times while looking at my tiny savings, finally decided it was worth it. Went through 6 contractors, finally there were a couple that I felt confident in working with, a few of them just ghosted me. One had a quote that seemed too low and I didn't feel confident that they understood what I was going for. One was able to work immediately rather than 3 weeks from now, and the price seemed right ($3,700). It's happening!
Here's some deets:
- This is a workshop/project space first, and a car garage last. I won't ever park in it, but maybe I'll try my hand at fixing something on my car one time. It's not located or being built to be a convenient daily parking spot. It will look and quack like a garage, though.
- Totally un-insulated. Maybe in the future... low priority.
- Slab will be dead level and flat, smooth finish. I'm risking water issues but I've read so many threads where 80% or more of garage shop homies are glad they have a level shop space, or wish they did. So I'm gonna stay solid on that. I have no business getting anything wet in there. If I have a leak in the roof or walls, a slope is the least of my problems, eh?
- I live in Central North Carolina, lots of rain, only a little bit of snow.
- Frost line is "at grade" according to code here, so going 12" below frost line is 12" below grade.
- * 16'x24' Monolithic slab, 3000 PSI mix with fiber mesh rather than wire mesh, ~4" central slab, 6" above final grade, 12"x12" turned in footers all around the perimeter, under final grade. #4 continuous rebar in the footer. 6mil vapor barrier under slab.
- This is essentially what I'm doing: https://imgur.com/k35RjSA
- I had a previous thread https://www.garagejournal.com/forum/showthread.php?t=417564 where many homies recommended a stem wall. I decided against their good judgement, and I'm sticking with no stem wall for a reason that is not 100% rational. I just don't want to. Other people have been fine, others have issues, but I'm going to give extra care to sealing externally at my sill plate, so I'm feeling OK about it.
- 2x4 wall construction, 16" OC, pressure treated sill plate with foam seal between it and concrete. Full 8' studs, double top plate overlapping joints.
- 9'x7' garage door, 3' side door.
- Windows are TBD. I might just frame windows after I have all wall sheathing wrapped and roof complete, in the interest of making the space useable as quickly as possible. Then I'll see how the interior space feels, how much wall space I feel is OK to sacrifice for the natty light.
- 7/16 OSB wall sheathing with reflective radiant barrier facing the inside. I'm using the same for my roof deck.
- I'm considering doing 1-2 feet of pressure treated 1/2" plywood as a lower course. Any thoughts?
- 2x6 rafters, 24" OC, birds-mouth notched, ~1.5 foot overhang all around including notched gable end rafter for 2x4 outrigger overhangs.
- 25-year shingles over 30# roof felt, drip edge, ridge vent, and lots of vinyl soffit.
- White vinyl siding to match my house (I hate white vinyl siding, but that's what I've got. I get blinded just looking at the side of my house. HOA is happy enough to approve, though.)
- PVC for all trim, unless I change my mind and rent a metal break and wrap everything. TBD.
I've started an album for pictures that I'm going to keep adding to: https://imgur.com/a/HB9FkU5
OK that's a long enough wall of text for now, I still have so many questions. This is gonna be quite the process. Thank you all for this awesome community, I may not have gotten to this point without yous guys.

