How to work out concrete costs??
#1
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How to work out concrete costs??
Stupid question time coming up
I want to price up concreting a garage.
Area is approx 84 sq meters and I would like 4-5 inches depth.
What will my costs be for all the mix. Sand, gravel ,cement qty.
thanks
jamie
I want to price up concreting a garage.
Area is approx 84 sq meters and I would like 4-5 inches depth.
What will my costs be for all the mix. Sand, gravel ,cement qty.
thanks
jamie
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By concreting a garage, you mean that you're going to build forms and make the whole garage out of concrete?
For 84 sq metres with a thickness of 125mm, you're going to need the following quantities.
3360 Kg of cement
6615 Kg of sand
12285 Kg of gravel
For 84 sq metres with a thickness of 125mm, you're going to need the following quantities.
3360 Kg of cement
6615 Kg of sand
12285 Kg of gravel
#3
I assume that you want to form a concrete base of 85 m2 @ 5" deep.
84m2 x 0.125m = 10.5m3
10.5m3 = 17.5 Tonnes
If you are prepared to mix ballast ( sand & gravel mixed at ratio of 2:1 ) with ordinary portland cement, you'll need the following:
116 bags of cement and apprx 14 tonnes of ballast.
I would suggest that you order the ballast direct from a quarry, through a builders merchant and order the cement from them as a yard delivery.
I would certainly suggest that you use a good platiciser and would recommend a sika branded product. Don't forget the visqueen layer underneath, normally supplied in a 100m2 roll and ask for 1200 gauge.
If you compare the costs of buying the raw materials and mixing it with a mixer against buying readymix concrete you'll save half but it depends how much your' time is worth.
Also worth considering sectioning the project and using a decent expansion joint material between section such as flexcell and filcrete. Once you've done all this and it's allowed to dry, make sure that you put a good few coats of dustproofer/hardener on.
Hope this helps, pity you're not in staffordshire as I manage a merchant ans could sort out all you need.
Good luck.
Si.
p.s: It may be worth laying steel mesh reinforcing sheets aswell just in case at same point you decide to use the base as a base for living quarters.
84m2 x 0.125m = 10.5m3
10.5m3 = 17.5 Tonnes
If you are prepared to mix ballast ( sand & gravel mixed at ratio of 2:1 ) with ordinary portland cement, you'll need the following:
116 bags of cement and apprx 14 tonnes of ballast.
I would suggest that you order the ballast direct from a quarry, through a builders merchant and order the cement from them as a yard delivery.
I would certainly suggest that you use a good platiciser and would recommend a sika branded product. Don't forget the visqueen layer underneath, normally supplied in a 100m2 roll and ask for 1200 gauge.
If you compare the costs of buying the raw materials and mixing it with a mixer against buying readymix concrete you'll save half but it depends how much your' time is worth.
Also worth considering sectioning the project and using a decent expansion joint material between section such as flexcell and filcrete. Once you've done all this and it's allowed to dry, make sure that you put a good few coats of dustproofer/hardener on.
Hope this helps, pity you're not in staffordshire as I manage a merchant ans could sort out all you need.
Good luck.
Si.
p.s: It may be worth laying steel mesh reinforcing sheets aswell just in case at same point you decide to use the base as a base for living quarters.
#4
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Cheers Guys
I am looking to simply concrete a floor in a built garage.
I was going to mix it myself and just baton off sections in the garage and use them to level off the mix
Thanks
I am looking to simply concrete a floor in a built garage.
I was going to mix it myself and just baton off sections in the garage and use them to level off the mix
Thanks
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I wouldn't bother mixing that amount, you'll be there for ever. Work on the first cubic metre at £120??, the remaining metres on the load at £40??. I'm not sure how many metres per delivery, or if the £120 first metre applies to the next wagon on the same order. I did some myself about 2 years ago, and me and 3 other lads barrowwed 4 C metres about 40yds from the road to the garden, and had it level in about 3 hrs.
You will need a supplier that is happy to tip into barrows though, you may pay a slight premium for this, though with enough lads and barrows it's easy enough.
You will need a supplier that is happy to tip into barrows though, you may pay a slight premium for this, though with enough lads and barrows it's easy enough.
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#8
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I work for a builder, and he pays roughly £55 ish per metre...... the firm we use have 6mtr lorries..... so for the amount repquired, it'd be two trucks, no way would i mix that amount by hand, but, i'm not sure i'd be too excited at the prospect of levelling that amount either.... even in two hits....
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