Shed base

Foxrocs

I need some help on how much cement sand I need. The shed is 8x6. The area is prone to flooding so thinking 6inch height. Using an online calculator it’s say 7 bags of cement but if using ratio 2 sand to 1 cement 1 water seems like a lot.
Any ideas what I need?

foxy farmer

Foxrocs wrote: »

I need some help on how much cement sand I need. The shed is 8x6. The area is prone to flooding so thinking 6inch height. Using an online calculator it’s say 7 bags of cement but if using ratio 2 sand to 1 cement 1 water seems like a lot.
Any ideas what I need?

2 Tonne bags of gravel (sand is no good for a base) would make a base of 9x7 at 6 inches thick. This size base will take just under 1 cu Mr of concrete. 10 -12 bags of cement would give a fine strong mix for the base.

jack of all

That's not a concrete mix, more like a very strong render or mortar. A traditional concrete mix would be 3:2:1 Aggregate (ballast), Sand and cement, batched by volume. Plenty of previous threads here re shed bases especially heed the advice to provide a rebated slab. That allows a 2"/ 50mm upstand around the edge to prevent water being blown in under the shed and into the interior. Also, there are many good you tube tutorials which cover the process in detail for the amateur.