Insulating detached garage

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Topic by nickajeglin posted 07-14-2019 07:07 PM 517 views 0 times favorited 0 replies Add to Favorites Watch
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07-14-2019 07:07 PM

Hello everyone, I recently bought a house and I’m planning on moving my woodworking shop from my parent’s basement to the detached garage. The only problem is that it’s unbearably hot.

I’m wondering the best way to insulate and heat/cool it enough to work out there. It’s a sloped roof with no soffits.
I did a little research, so I feel pretty confident that the walls aren’t too hard. I would just put 2×4 framing right up on the cinder block, roll out fiberglass between the studs, and nail on drywall, OSB, or plywood.

I’m more confused about how to handle the roof. I see two or 3 possible options:
1) Treat it exactly like the walls: roll out fiberglass, and cover it up. pros: I keep the wood storage in the rafters, high ceilings are nice cons: requires more sq. ft of insulation, I have no idea how to handle ventilation.
2) Build a ceiling, and insulate that from above pros: less insulation needed. cons: I lose the wood storage space and the ceiling is lowered.
3) Build a mini-ceiling about halfway up the roofline so I have a trapezoid shaped ceiling. pros: I keep some storage space, maybe ventilation is easier, it takes slightly less insulation material. cons: ?

With respect to heating and cooling, I don’t need it to be 70F year round, just bearable. Like between 40 and 80. This makes me think that insulating the ceiling is probably enough, and then adding a window unit and space heater would probably do it.

From the small amount of research I’ve done and just general knowledge, I understand that ventilation is super important when it comes to the roof, but I don’t really know the best way to approach this since there aren’t any soffits to place vents in.

Can someone with more experience point me in the right direction? Especially when it comes to how to correctly provide air flow for the roof. I’m leaning towards option 3 right now, as keeping the wood storage is pretty important to me, and it seems like it might make ventilation easier.

I uploaded some pictures here

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