I can seriously sympathize. I worked for 2+ years in a 11x16 basement workshop, with 73” ceilings (I’m 6’1”). Had to rearrange to do anything, and the tablesaw outfeed table was also the assembly table.
I had machines crammed in there: Tablesaw w/ router extension, drill press, planer, jointer, midi lathe, dust collector, air cleaner, mortiser and 10” bandsaw.
This past fall I took over the garage. It is a 2 1/4 stall garage, and cinderblock. It had a preexisting 30A service with a small sub-panel.
First off, electrical is so key! Breaker trips, brownouts, and inaccessibility are so tiresome.
I double and tripled checked the specs, and turns out the wiring was sufficient for 40A. So I upgraded the breaker on the main panel, and planned various circuits for the garage.
Isolated circuits:
1) Garage door openers, and attic/loft power & lights
2) Overhead lights (I put in a dozen, two bulb T-8s)
3) 20A run for outlets (I used white outlets).
4) Another 20A run for outlets (I used brown outlets)
5) GFCI outlet at the sub-panel (required by code)
I ran 12 gauge wire throughout, knowing these would be 20 amp circuits. For the small cost difference (vs 14g), having the 12g everywhere is well worth it and you can do pretty much whatever you like with 20a circuits.
I used 15amp outlets at each drop, because they’re $0.49 each and there’s no really benefit having individual 20A sockets. The drops are 2-gang boxes, so I have one of each outlet—thus both circuits are available at each drop).
This was so I could put my dust collector, heaters, or whatever on one circuit, and tools and such on the other.
Because my walls are cinderblock, I couldn’t do wiring through studs. So I ran it in Sch80 conduit, about 42” off the ground. This puts it higher than cabinets, worktables, tools, etc. And I don’t have to pretzel-twist to plug something in (if it were lower to the ground and behind a machine). Also used conduit to run to the overhead lights. There are a few outlets higher up along a central beam and for the garage door openers.
Lighting is the second consideration.
Tons and tons of light. I went (almost) overboard, installing 6 two-tube fluorescent T-8s on each side, for a total of a dozen. It is niiice and briiight. I have not regretted the pricey soluation, because it is plentiful light.
The lights are on separate switches (one per bay), but the same circuit. I thought I would save power by only turning on one side when doing specific work. But I almost always turn both sets on.
Walls:
I put in 1.5” foamboard, with all seams taped, to help insulate, between 2-by furring strips (Tapcon and glue to secure it to the cinderblocks). I wanted to be able to hang anything, anywhere, so I mounted ¾” plywood all the way around, floor to ceiling. I wanted to put plywood on the ceiling, but for reasons related to fire code or something, I had 5/8” drywall installed (this was the only task I contracted out). I put in R-13 faced insulation in the ceiling.
The plywood walls has paid off many times over. As I work to get my shop fully setup and arranged, I’ve been moving things around. This has involved a few instances of mounting something, then moving it and mounting it elsewhere. There are literally no limitations on wall location. This is awesome.
I went with 3/4" over 1/2” because I knew I would be hanging a lumber rack, some heavy clamp-racks (clamps) and so on. Eventually I will also have some wall cabinets
Climate:
Although the foamboard, vapor barrier and are good additions, my shop is not warm. I still need to use one of the garage doors (to get the snowblower in an out), and it leaks quite a bit of air. The other garage door I sealed up with clear weather stripping sealant. This means I cannot open it.. but the sealant is removable if we sell the house.
The floor is concrete, so it is COLD.
I have a little oil filled radiator, and a radiant heater.. but they are just barely adequate. The conundrum I have is that an adequate heater would require 220V, and take up about 1/2 or more of my electrical capacity.
Or I could get a gas/propane/kerosene heater, but almost all of them require active ventilation (e.g. open the doors), which just seems silly to me. A wood stove would require a 4”+ hole in the wall for a vent/chimney, but there isn’t a good location for this. Finally, there are vent-less gas heaters, but the trade off is they produce a lot of air moisture. I’m not sure I’m ready to put a ton of effort into rust maintenance. As it is, I wear a cap, a fleece, and flannel lined jeans, and I’m pretty comfy. With both little heaters going the shop comes up to about 50o.
In the summer it can get hot in there. In past years I’ve just had a box fan, since I was only partly working out there. I anticipate my first summer in the full workshop will require some additional cooling.
Layout
Take some time to measure (your space and your machines) and get a solid layout plan. Factor in doors (for in/outfeed), where to put your power drops, and workflow. Mobile machines still make sense, but aim for the majority of them to stay in place most of the time. You cannot have too many work tables. Especially for assembly and finishing, and having more than a single project going. I think the MFT800s are superstars for frequent, but not permanent, use.
Things I would do differently:
> More climate control
> I should’ve covered the concrete floor. There was a great article in FWW about 3 months ago, which had a lot of info about setting up sleepers, vapor barrier, and 3/4" floor. One interesting possibility of doing this is putting a run of electrical, and having a floor outlet (next to your tablesaw, for example). Also, concrete transmits moisture, so boards leaning/laying on concrete will become damp.
> More storage! Someone said woodworker’s storage is about square feet, not cubic feet. All the jigs, doodads, measuring and layout tools, etc, etc etc require a spot., but not always a lot of space. I’m in the process of building some more Sys-port-like cabinets, and will likely put a lot of that stuff into Systainers.
> Kick out the BBQ, snowblower, and lawnmower. Although I put up a small shed wayyy in the back yard, two of these three things will probably always be housed in the garage part of the year. [mad] Collectively, they take up about 20 sq. feet.