Well, the addition started today. I took a few pictures but the PC in the house doesn't have a SD card slot. That's what happens when you buy a refurb computer. I'll get them loaded up tomorrow before I start digging.
I pulled the vinyl siding off the east side of the garage. This is were the addition is going. I also mowed the grass as I'll be taking the mower deck off and putting the back hoe back on. The short grass will also help with layout and staking.
The original plan was a 12' wide x 18' long addition with 10' side walls. The I decided to make it 28' long, no reason to leave a back corner in grass. When I upped it to 28', I was going to try to match the roof line on the back of the garage. After trying to work it out in my head, I said screw it. It'll all have 10' walls rather than the back 10 feet being ~7' walls which would allow the roof height to tie in correctly. Then I thought about it again, 12' measured on the outside outside of the block, leaves me about 10.5' on the inside. Oh brother here we go again. . . I'd like 12 feet on the inside. So the final mental design calls for 14'W x28'L x10'H.
I'm holding the length short of full garage length. I don't want to mess with a meter base. I'll give up the 2 1/2' not to move any power. However, the plan does call for a 100A sub-panel in the addition. Since the wall between the old/new is going to be separate, it'll actually be a double thick wall. Not wanting to run all the power through the double wall, I decided to run just one conduit to power up the sub panel.
There will be a 36" man door between the sides and a matching 9x8 O/H door. It'll be fully insulated, including the block foundation walls. I will be spray foaming the top and bottom of the wall cavities (more later when I do it) and then adding fiberglass batts. The walls will be 2x6 construction and covered with OSB/plywood internally. Externally, it'll be vinyl siding like the rest of the garage. However, with the current pricing, I may up grade the exterior sheathing to Zip.
The roofing with be shingles to match the current roof and roof sheathing may be foil faced OSB (like the current exterior walls) to assist in cooling the addition.
I'm considering adding to the current duct work from the wood burner. I think it'll create enough heat to warm the added space. Cooling, just might be a mini-split in the future, one reason for the sub panel. The other thought is to move all my metal fab stuff to the back corner, which includes, welders,torches and plasma cutter. The Lincoln tombstone requires a 50A breaker. So it's all future proofing.