Not around here - $4.50~5.50 sq/ft. Requirements here are 3/8 bar 18" OC with two 1/2" bars in the footer. Footer can be 12x12 or so and be fine.
Where you are, I think your footers are going to be much more extensive since you have a frost line. I read 42" for most of Michigan - that's a lot of backhoe work plus forms. you should be buying around 3500 psi mix. Make damn sure you know what you are getting for the quoted price. Details very important, down to who buys and sets the anchor bolts.
I have made this mistake twice on here. I forget to mention very important details. This will be just a floating slab, i do not need footers since i am doing post frame.
Also for my area of michigan, code requires 52" just an fyi for anyone reading this.
I thank you (and everyone) for being blunt, i like it.
First thing is to reschedule. Unless you already have all your excavation, grading, fill and all other prep work done, you are really pushing the weather. No way I would do it. Prep work is very important. Consider drainage, existing soil composition, materials to be removed, materials to be brought in etc etc.
Plus I would think about insulation, in floor heat, any underground work like electrical or plumbing or pads for a future lift or other equipment.
Depending on use you might want a thicker slab and reinforcing steel bars, not just wire mesh. Have you decided if you want the slab flat or sloped or a combination?
All in all it seems like the planning hasn't been completely done and it's too late to make careful selections and decisions for this fall/winter.A slab takes 30 days of good weather to properly set up. Otherwise you need to monkey with the formula and take lots of precautions to make everything go right. I would much rather do the job in optimum conditions with a crew I trusted with a history of great results. This is an art. I have experience with doing a slab in winter conditions. It had to be jack hammered out. The whole surface spalled off. Take advantage of the experience here on the group and their good advice.
I was hoping to get the slab in asap because i wanted to take the winter to finish out the inside, then move all my stuff in the later winter/early spring.
But i trust what you guys are telling me, i can wait to get it done right. I asked one of the contractors about waiting, and he said cement will be going up in price Jan 1 and that it wont be a little bit. I think he was trying to convince me to do it now....
Here is the way I see it:
18 yards of concrete @ $100 a yard $1800
2 rolls wire @ $125 a roll $250
2 rolls of plastic (vapor) @$70 rolll $140
form boards $100
Materials $2300
Turn key $3ft $3600? So are your friends working for free? bring their own lunch drinks etc? You own a bull float, screed board, transit, floats, edger? Ummmm. I would pour now and not wait until December or wait until spring.
I always buy materials on my account and pay around $35-40 yard for prep and finishing. Good luck.
Yes turn key $3/ft. I figured 15 yds @ $98/yard since we only have 3 places to purchase from around here, and they all have the same price.
Good point on the tools, i have none of them and doubt my friends do either.
The three contractors i spoke with said the same thing:
For $3/ft i get a truck load or two of sand to level/setup, concrete, mesh, and professional work.
