Reply by CaptainKlutz

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Posted on Insulating detached garage shop

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4425 posts in 2569 days

#1 posted 07-16-2019 05:59 PM

Hmm, lot of ways to do this?

Open soffit roof on block walls is old school way to build forging or metal fabrication work shop in ‘mild’ climates?
Current building codes would require some changes to that roof structure. Looking at the roof boards, appears there are replacements, and some with old water damage?

So first:
Suggest you call 3-4 roofing companies and get quotes/designs from them about best way to insulate and deal with that roof. Be sure to ask about any deficiencies in roof that would be upgraded as part of insulation work. This will give a solid direction on methods and costs involved.
Last thing you want to do is insulate the inside, and have leaks to learn you need a new roof. If need a new roof, then option to add reflective foam insulation boards under the sheeting/shingles will be great start to reducing the heat load and might leave you a more open attic area for storage.

+1 Use foam board on walls with furring strips.

+1 Must plan for moisture control.
Be sure to seal the inside of block with water proofing cement paint, and put a moisture barrier under the wall sheeting. Water goes right through block, and then acts sort of like a sponge. Water is always there, till it completely dries out. With painted outside surface slowing moisture transfer, completely dry block walls will never happen.

Best Luck.

-- If it wasn't for bad luck, I wouldn't have no luck at all, Doom, despair, agony on me… - Albert King - Born Under a Bad Sign released 1967

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