concrete garage bases

[helpimcrap]

Hi peeps,
How much for a concrete base for a concrete garage - base needs to be 9'1" x 17'3".
I'm toying with the idea of doing it myself but have got up to a material cost of £700 so far!!!

I need to -
Dig up Tarmac 10" deep, then 4" Hard core, then 6" concrete mix with wire mesh in to stop it cracking under weight.
Is that about right?

I've enquired about getting it done and am waiting on things to happen but after an idea of cost if i get it done please?

 

[helpimcrap]

Thought about digging the base up and allowed for 2 skip loads - toying with the idea of ready mix delivery but factored price on buying the cement and sand and mixing it myself in a wheelbarrow - worst case scenario so to speak!

 

[helpimcrap]

cheers for the insights guys - but how much should one expect to pay to have a base put in?

People say about shuttering - what actually is that!?

Is it like putting stakes in the ground to stop the outer edge of tarmac falling into the hole?

 

[helpimcrap]

150mm x25mm sawn timber * 50mmx50mm sawn timber pegs.

As I said in eariler reply, laid your subase 300mm wider on all sides than your concrete base, when you laid shuttering, check the squareness by measuring the diagonals.

you need to make sure you use enough pegs with shuttering, otherwise the concrete will break out when you pour the concrete.

If your having a ramp to garage, pour this seperate a few days after doing garage base.

Yep 6" wider than the garage on all sides using mesh in the concrete to stop it breaking up.

laid shuttering?
Is it plastic sheet or something?

No ramp.

I was just going to dig a hole 10" deep and fill with hard core/concrete and then let dry. Then garage on top.

 

[helpimcrap]

http://www.bing.com/images/search?q...A3022E1EF5F54E40AAB69DABB5BE&selectedIndex=49

Is shuttering. It will give you perfect smooth sides and be a much much better job. You can also get an exact amount of concrete to fill it. As said, it needs to be quite well supported / pegged out.

Ah shuttering is basically breezeblock or equivilent around the edge of the hole a) stopping the tarmac falling in and b) giving a nice square hole which will hold the concrete in as well.

Thanks for that!

 

[helpimcrap]

Got a quote on the gargae base. Want to get another to compare.

£860 which is digging it up, prepping it, and sticking 4" hard core and 4" of fibres concrete mix and it includes the waterproof membrane and wire mesh in the concrete.

Does this sound a good price?

It's going to cost about £2-300 for skips, £400 for the readymix cement, £100 for mesh and about £20 for membrane.

It works out I'll be paying all that anyway if i did it myself....

The garage company recommend a 4" hard core/4" concrete base (but this includes concrete fibre mix and mesh).