1.85M Depth foundation costs?
Discussion
Hopefully I am about to put some extension plans out to tender. It has already been quite a journey getting to this stage with much wrangling between English Heritage ( we are G2 listed) modern building regs, our structural engineer and the Oak framer who is going to make the 'skeleton'
I Think the total length of footings is going to be @32M. Flat site, lots of room, easy access. BUT just enough tree root proximity to require 1.85M deep footings - floor will be block and beam.
Anybody care to offer a ballpark guess as to the extra £ per M over a basic 1M footing..?
I Think the total length of footings is going to be @32M. Flat site, lots of room, easy access. BUT just enough tree root proximity to require 1.85M deep footings - floor will be block and beam.
Anybody care to offer a ballpark guess as to the extra £ per M over a basic 1M footing..?
You've got about 35 cu meters which is about 5-6 grab lorries which are about 240 plus vat a load.
You've got about 35 meters of concrete which is about 3500 maybe a bit more plus vat.
Then you've got the labour which could be anyone's guess as depends on what the sites like for access, depends if there's services everywhere etc .
You've got about 35 meters of concrete which is about 3500 maybe a bit more plus vat.
Then you've got the labour which could be anyone's guess as depends on what the sites like for access, depends if there's services everywhere etc .
Also need more protection of the excavations for health and safety, deep founds are higher risk and often need supporting. Trench fill may make more sense.
Bulk of the cost is concrete and muck off site. Cost goes up on those items almost pro rata depending on volume as related to wagon size.
Bulk of the cost is concrete and muck off site. Cost goes up on those items almost pro rata depending on volume as related to wagon size.
Foundations 1.85 mts deep may need shoring up and BC will probably want clay boards installed.
Based on these things your looking at an extra £121 per LN mt over foundations 1 mt deep x 600mm wide.
You will be looking at around £7400 at 1.85 deep and £3500 at 1 mt deep
This is based on flat site conditions with easy access,leaving the top of the concrete 350mm below ground level to allow for beam and block installation.
You will need 29 cu3 mts of concrete and allowing 22% expansion on soil about 43 cu3 to dispose of.
Based on these things your looking at an extra £121 per LN mt over foundations 1 mt deep x 600mm wide.
You will be looking at around £7400 at 1.85 deep and £3500 at 1 mt deep
This is based on flat site conditions with easy access,leaving the top of the concrete 350mm below ground level to allow for beam and block installation.
You will need 29 cu3 mts of concrete and allowing 22% expansion on soil about 43 cu3 to dispose of.
AlmostUseful said:
blueg33 said:
RATATTAK said:
blueg33 said:
About 3 x cost of 600 cm founds 
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