Posted: Sun Apr 24, 2011 4:09 pm
Dug out for a small conservatory yesterday. Dug to 600mm, poor ground and found the extension the conservatory will be connected to is on a raft. Then spoke to the customer who then informed me that the extension has been rebuilt after subsidence in the 1st build. The extension also has been piled under the raft too, and the original house is on a raft, with enough space under the downstairs floor to stand up!
So, spoke to the customer about my obviously concerns, dug a test hole next to extension, and found clay at 1200mm, thought we might be ok, so dug enough out to test the clay, to find out it was only a layer of clay approx 200mm thick with more poor ground below, so back to square one.
Test hole is now around 1400mm, I dont fancy taking more out knowing the depth of the house raft, the customer also thinks that the piles on the extension went in about 15ft.
So my questions are:
Whats the best option piling/raft?
A raft would surley needed to be calculated, i dont fancy putting my name to one that hasnt, any thoughts?
I can get it piled for £1000 excluding concreting them up.
Obviously its not under building control, and im sure im correct in thinking of the above options, but does anyone else think im massivley overkilling it?
You always hear, 'its only a conservatory', and i guess many would have poured at the 600mm mark, maybe less and thought no more, but to me thats a gamble im not prepared to take!
Cheers
Allan
So, spoke to the customer about my obviously concerns, dug a test hole next to extension, and found clay at 1200mm, thought we might be ok, so dug enough out to test the clay, to find out it was only a layer of clay approx 200mm thick with more poor ground below, so back to square one.
Test hole is now around 1400mm, I dont fancy taking more out knowing the depth of the house raft, the customer also thinks that the piles on the extension went in about 15ft.
So my questions are:
Whats the best option piling/raft?
A raft would surley needed to be calculated, i dont fancy putting my name to one that hasnt, any thoughts?
I can get it piled for £1000 excluding concreting them up.
Obviously its not under building control, and im sure im correct in thinking of the above options, but does anyone else think im massivley overkilling it?
You always hear, 'its only a conservatory', and i guess many would have poured at the 600mm mark, maybe less and thought no more, but to me thats a gamble im not prepared to take!
Cheers
Allan