re: Home Builder Guys

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Ive seen contractors skimp in areas you wouldn't believe. Went to a house the other week and the guys had 2" of concrete in some areas of the slab with 12" exterior footings. Those should have been 16". Contractor had no idea when it was pointed out to him. It wasn't intentional on his part, but the Mexicans hauling arse through the forming process, and they don't care if it's correct of not

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If the house was built in the last 10 years it had a form and rebar inspection. You ain't skimming on grade beam thickness.

Getting a slab scanned and/or cored is expensive. Your slab doesn't matter, it's not carrying any load except the live load you are actually putting on it (like your car). Only way you need be concerned is if the slab is post tensioned, which isn't very common in residential but does exist. That information should have been made available in your inspection prior to purchase.

Seriously OP, you're probably good here. You can have a contractor come in and give you an estimate, just make sure they're licensed properly.

And honestly... IMO it ain't that big a deal on residential construction. I stamp these type of additions all the time without any sort of verification of the size of the rebar or grade beam. It's typically cost prohibitive to the owner. If there aren't any settlement issues on the house (or sometimes in the neighborhood) I'm generally good with it.

16" studs on center is fine. Go with advantec subflooring and insulate. I'd insulate garage doors and subflooring as well.

Foam everything. Trust me. Its small, but tricky space to properly heat and cool

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2'12" Ceiling Joists ; 16" oc

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Roll with it. You should be more than good here.

Like others have said, foam everything.

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And honestly... IMO it ain't that big a deal on residential construction. I stamp these type of additions all the time without any sort of verification of the size of the rebar or grade beam. It's typically cost prohibitive to the owner. If there aren't any settlement issues on the house (or sometimes in the neighborhood) I'm generally good with it.

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What sort of bearing pressures do you typically assume? I assume there's no soil borings/geotechnical reports typically done for you.

At least in the NYS/NYC Building code there's a presumed bearing capacity based on the soil in situ, but you need a soil boring to verify that.

When we poured the slab for my garage the inspector had to take and submit pictures.

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Homes are going from $160-$170 soft in my hood, so I figure if I can come in under that I am in the black.

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It won't be part of your livable area. It is an upward adjustment, but each sqft you add will not add $160/ft of value. Hard to tell what the actual adjustment would be, I am just saying don't count on it adding to your value at the market rate.

I think my wife must have a bunch of alters and is posting in this thread because she knows fricking everything too.

OP I could have built out my attic for the time this post has been up. Forget the concrete unless you are going to park cars up there too. Maybe add a few more ceiling joist, fur out as needed to make the rock work out and go. If tight for space find a nice spiral staircase. I hate them but they are compact.

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Dude... I've seen you talk out of your arse for years on construction threads. Most of the time it's half arse, half true, or straight up bullshite.

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most of the OT.