I'm pouring my own, so it's only costing me for the concrete and the tool rental. Go here to calculate concrete amounts, then factor in price (if you are doing it) or price per yard (if someone else is doing it)
30' x 30' = 900sf
900sf x 4"(thick) = 270 square feet
270sf / 27sf/cuyd = 10 cubic yard.
A cubic yard of concrete runs about $150-175 for standard 3500psi concrete
Thats 150-175$/cuyd x 10cuyd = $1500-1750.00
Add about 10% for wire fabric reinforcing and 5% for labor to install and 5% more formwork for the slab and 2-7% for overhead (to truck the concrete and do billings and such) and then profit. (If it is the busy season some Contractors like to take the raw material costs and double it to get actual costs for installation due to working a lot of summer overtime and dont forget the prices of concrete may vary in your area...call your local concrete yard and get a good price. Also call your local hardware store and get pricing on your welded wire fabric and 2X6's for formwork)
so the 1500-1750
will be somewhere in the neighborhood of
1875 to 2250.
Obviously if you want rebar in lieu of wwf and floor drains and special finishes or anything better than basic concrete (consider integral fiberglass reinforcing) the costs will be more. Also, if you are pouring a foundation consider that as well or at least turn the corners down as that is where a mouse will live, which when he dies a rabbit will borough, and then a groundhog and before you know it you will have voids under your slab and will be wondering why it is cracking. Consider putting a foundation under your slab to at least frost depth to avoid any movement and varmits from undermining your investiment.
I just did some concrete work last week @ $82 a yard delivered, for 3500psi and that included a surcharge for a load under 4 yds. $150-175 a yd WOW, thats insane I figured yours on an average of 5" thickness, that would require 14 yds. A 150'roll of 6x6 wire is rougly $100. So at least in my area youre looking at Over $1200 in materials, Ive found that when it comes to construction stuff like this as a rule you can almost double the cost of materials to come up with a completed cost by a contractor. A buddy of mine just had a 24x36 6" slab poured for his garage at a cost of $2700. Ive got some experience with this stuff as well as some friends so Im inclined to do my own next yr when I build my new garage.
edit: Hey I just about repeated skunked... should have read his whole post..lol
65 GT coupe 331/5 speed
2001 Lightning #1757
DO NOT fail to rebar a slab that big.
Don't forget to add for the depth of the footingss around the perimeter. Usually twice the depth (at least) of the thickness of the whole floor. Compact to area of the slab.
And, can you form this up yourself?
Be advised, if you pour this on a saturday, YOU pay the premium for the drivers overtime,
67 GT 350 (#0036)("Miss July" 2004) owned since 1971. And I still drive it...SAAC 29 Concours GOLD, Div II, MCA Concours Trailered Gold 2X,
Also: 67 GTA S code COUPE (under construction)
General Shelby and Mustang enthusiast, MCA certified Concours judge
I'll let you guy's fight over the math, but here's the deal in my area.(It will vary depending on your location. I have a medium size constuction co and we pour a lot of concrete.
Over 3 yds-$78.00 yard+tax-no delivery charge if under 1 hour pour.
Labor(this is what my subs charge)0-15 yds slab pour=$500 for trowel finish/$650 for trowel/machine finish
I would highly recommend a machine finish/sealed if you are going to be spilling any thing on it.
As far as wire & control joints, we've been pouring with fibermesh additive here in New England for 20 years and the only cracks we've had came from pouring over unstable soil. Put down 2" of 3/4 stone and compact and you won't have any problems. Wire mesh isn't for preventing cracks, it's for holding concrete together if it does crack.
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