concrete slab for summerhouse Post your questions and get answers regarding all areas of drives, pathways and patios

[olliejames]

Hi there, my mate wants me to lay a concrete slab for summerhouse, its going to be 4 metres x 4 metres sq, what should be the depth of the hardcore and the depth of the concrete, how much material will i need thankyou hope you can help me

[stokedan1]

Whats the ground like? if ground is bad dig off till you reach clay, build back up with hardcore cap off with 100mm of type 1 MOT, then a 150mm conc slab, if ground is good no need for hardcore.

MOT at 100mm = 3.84 ton
conc at 150mm = 2.4 cubic metres

Hardcore if needed depends on how much you have to dig out

[stokedan1]

sorry mate forgot about visqueen on top of mot/under conc for damp protection

[olliejames]

sorry mate forgot about visqueen on top of mot/under conc for damp protection

Hi stokedan1 sorry for the delay in my reply thanks for the advise should be sound now cheers