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Hi, I have made an offer to buy a house at £130,000. I commissioned a homebuyer report which confirms the valuation at £130,000 with one condition, it identifies the house being built in 1955 in an area known to use mining shale as the hardcore foundation, which may be susceptible to sulphate attack (a process where the concrete expand and cause structural problem when in prolonged contact with moisture). The floor has been renovated and there is no sign of cracks or budged floor, so the surveyor was unable to visually access the risk.
I looked online and found a company which performs so called floor slab test. They would drill a hole and take samples of the foundation for a lab test. However, this is not yet my house and to do so I will certainly require seller's authorisation. Is it worth doing such a test? What if the seller refuses? If a fault is found how much is it roughly to repair/damp proof/replace the concrete slab?
Thanks
I looked online and found a company which performs so called floor slab test. They would drill a hole and take samples of the foundation for a lab test. However, this is not yet my house and to do so I will certainly require seller's authorisation. Is it worth doing such a test? What if the seller refuses? If a fault is found how much is it roughly to repair/damp proof/replace the concrete slab?
Thanks