Cost for a wall?

caribmike

caribmike

Gold
Jul 9, 2009
6,808
202
63
Hi there,

I am stuck trying to calculate the cost for a wall 6 to 7 feet high around a 400 m2 lot (20 meters by 20 meters).
I can't figure out how much concrete and iron bars would be needed.
Does anybody has an estimate?

Thanks a lot!
 
cobraboy

cobraboy

Pro-Bono Demolition Hobbyist
Jul 24, 2004
40,964
936
113
caribmike said:
Hi there,

I am stuck trying to calculate the cost for a wall 6 to 7 feet high around a 400 m2 lot (20 meters by 20 meters).
I can't figure out how much concrete and iron bars would be needed.
Does anybody has an estimate?

Thanks a lot!
Click to expand...
You'll probably need about 2300 blocks, 475 80lb bags of concrete and 16 20' pcs of #4 rebar.
 
cobraboy

cobraboy

Pro-Bono Demolition Hobbyist
Jul 24, 2004
40,964
936
113
donP said:
Blocks: 6 or 8"?
No sand?
No gravel?

donP
Click to expand...
I guessed 8".

I never attempted to do a job estimate, just some basics. As an engineer, I'll bet you could offer some volumes of sand and gravel in addition to my estimates.
 
caribmike

caribmike

Gold
Jul 9, 2009
6,808
202
63
Block size, good question... Does it matter regarding the height? Should one use the 8" ones for higher stability? But it won't fall on one while leaning against it when it is 6" blocks, I guess :)? Then again I'm no expert...

What about the cost? That looks like close to 400 - 500 thousand?
 
Last edited:
caribmike

caribmike

Gold
Jul 9, 2009
6,808
202
63
@cobraboy:

Wow, around 475 bag of concrete? Means a bag for each 5 blocks? Never thought it would need that much concrete...
 
G

Givadogahome

Silver
Sep 27, 2011
4,397
2
0
Concrete or cement? I was going to give my 2pence but it seems we are not on the same page, at all. It's been a while but I didn't think it had been long enough for me to forget all and become so confused by simple basics.
 
cobraboy

cobraboy

Pro-Bono Demolition Hobbyist
Jul 24, 2004
40,964
936
113
caribmike said:
Errr, is concrete and cement not the same? Thought it is, getting confused now, too....
Click to expand...
Concrete for the footer and to fill in the holes with the rebar. Mortar for the rest. Cement is the binder in both.

Basicly, Concrete is cement with sand and aggregate, and mortar is cement with sand...
 
caribmike

caribmike

Gold
Jul 9, 2009
6,808
202
63
The footer, got it, that explains the amount of bags, OK. But that would still be the naked wall, i.e. to cover it would be more mortar (?) needed? Jeez, that would cost me more than the lot was I'm afraid...
 
cobraboy

cobraboy

Pro-Bono Demolition Hobbyist
Jul 24, 2004
40,964
936
113
caribmike said:
The footer, got it, that explains the amount of bags, OK. But that would still be the naked wall, i.e. to cover it would be more mortar (?) needed? Jeez, that would cost me more than the lot was I'm afraid...
Click to expand...
Yep. Stucco is best but Dominicans often add more sand to mortar and use that.

AND, unless you want the wall to evenutally weather and weaken, you need to prime and paint it...
 
caribmike

caribmike

Gold
Jul 9, 2009
6,808
202
63
Which opens the question how many gallons of paint are and what kind of paint is needed and the cost of it :(
 
caribmike

caribmike

Gold
Jul 9, 2009
6,808
202
63
Anybody want to buy a lot? :) ....just kidding.

So, looks like the cheapest part in the calculation are the blocks.... Was thinking in a cheaper way to get a wall, but not possible I guess since the most pricey part is the cement and cannot be spared...
 
J

jrhartley

Gold
Sep 10, 2008
8,190
580
0
64
so basically still no answer after all that- I was interested in finding out a basic cost as well
 
You must log in or register to reply here.
Top Bottom