Thank you in advance!

]]>Thank you in advance!

]]>Here is something, 94lbs if cement yields a 50 gallon drum, roughly 7 cubic feet of material. A 94lb bag is say $11. Assuming water is free and you just need foam, the foaming agent is $45 for 160 gallons or roughly .30/gallon. I am not 100 percent sure but let’s say it takes 3 gallons water/foam for 50 gallon drum, so 3 gallons at .30 per gallon and we need 3 so we can round up and say $1 per barrel in foam. So we are at $12 for 7 cu feet of material.

You can figure the rest out from there. Just multiply total length of walls and total height of walls and total width of walls to get volume used and use numbers above to get cost. This doesn’t give outside coating cost.

Say a 100 sq ft room 10x10 has 40 linear feet of wall, roughly. 8’ high gives 320sq ft of wall space say 6” thick is 160 cubic feet of wall volume. I think my math is right here. So 160 cu feet divided by 7 cu ft per barrel is 23 or so unique 50 gallon barrels of aircrete. So 23 barrels of product * 12 a barrel is $275 in cost or so.

So $2.75 per ft not counting a roof. $5 a ft for 1’ thick walls.

I did all this this way cause I don’t know nor want to look up the math for a volume of a sphere but you get the point. It’s cheap. :) i hope this helps.

]]>So, assuming a 14' dome as made at workshops, 6" or 1/2 foot thick walls, a true half sphere (dome) then calculate the volume of 14' sphere then subtract the thickness and calculate the volume again and subtract from the first. Finally, divide by 2 and this is the volume of material.

So..

Diameter = 14' feet

Radius=7

Thickness=.5

(4/3) x 3.1415 x 7=1.333333333 x 3.1415 x 7 x 7 x 7=1,437 cubic feet

Do again with Radius of 6.5

(4/3)x3.1415x(6.5x6.5x6.5)=1150 cubic feet

Subtract the two and dived sphere in half.

1437-1150=287/2=144 cubic feet.

Using the prices above of $12 for 7 cubic feet or say $1.72 per cubic foot the dome would cost $251. This doesn't include the foundation.. So, a 14" foot dome has (pie*Radius squared) 153.9 square feet which is $1.63 square foot in for a perfect half sphere dome that is 14 feet in diameter. Again, not counting the foundation...

I made a Google spreadsheet to calculate cost. Not sure if it's works with only viewing privilege, but your welcome to try it...

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