Ive been given the option of a raft or footings for foundations for a garage however i havent priced them up yet. Been getting conflicting advice concerning pricing from others that have had work like this previous. Its for a basic garage, ground conditions are good. House was built in 1997 and theres been hardcore stones on the area where where the garage is going. I park here, theres a slight slope and never no damp issues.
Given that ive 2 options, im thinking of going with the strip but just need some advice to refresh my memory. Ive worked on footings before but its been a some years, i forget the thickness of them. I will be getting my engineer to draw up the correct footings however for now, im trying to get a rough estimate of what ill need. With the ground being good to build on( or so i think for now before any trail holes dug) Here we dig 800mm to 1m deep by 600mm wide if the conditions are good. This is below the frost line and 250mm-350mm thick concrete x 600mm wide then build up in block of the founds to dpc level. 250mm being the minimum thickness if i remember correctly. This is for single story garages and bungalows. For double story houses the thickness and width could be more.
Ive been on jobs where there was no need for rebar or mesh however if i was to do this, throwing in some 18mm mesh into the footings for all the cost of it, would help greatly. Rebar even more.
The raft is a raft. Lots of hardcore, steel and concrete. Been getting conflicting advice some sating they work out the same amount of money and work, others say the raft is dearer and had 2 say the footings can work out dearer if they are deep plus one has to take into consideration all the extra work needed for the slab floor along with the hardcore wacking, dpc and mesh.
Given that ive 2 options, im thinking of going with the strip but just need some advice to refresh my memory. Ive worked on footings before but its been a some years, i forget the thickness of them. I will be getting my engineer to draw up the correct footings however for now, im trying to get a rough estimate of what ill need. With the ground being good to build on( or so i think for now before any trail holes dug) Here we dig 800mm to 1m deep by 600mm wide if the conditions are good. This is below the frost line and 250mm-350mm thick concrete x 600mm wide then build up in block of the founds to dpc level. 250mm being the minimum thickness if i remember correctly. This is for single story garages and bungalows. For double story houses the thickness and width could be more.
Ive been on jobs where there was no need for rebar or mesh however if i was to do this, throwing in some 18mm mesh into the footings for all the cost of it, would help greatly. Rebar even more.
The raft is a raft. Lots of hardcore, steel and concrete. Been getting conflicting advice some sating they work out the same amount of money and work, others say the raft is dearer and had 2 say the footings can work out dearer if they are deep plus one has to take into consideration all the extra work needed for the slab floor along with the hardcore wacking, dpc and mesh.