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Capital Stone is unique in so far as we have a dedicated Lead based paint removal section that specialises in safely removing lead contaminated paint coatings from all types of substrates. All our operatives have regular blood tests to monitor the lead levels in their blood and we perform this work under very strict and controlled conditions.
Most of our contaminated lead paint removal works are internal in sensitive locations such as schools, colleges, stations and other public areas. The works area is sealed off and the coatings covered with a chemically impregnated poultice which is allowed to dwell for up to 3 days depending on the ambient temperature. The poultice is then carefully removed by hand by fully protected operatives, who bag and seal the poultice/paint amalgam. The substrate is then washed using our vacuum recovery steam hoses which entrap all the residues of paint and poultice. The wash-off is syphoned to contaminated storage tanks for safe disposal by qualified waste handlers.
One of the hardest and most potentially confrontational jobs we do is paint removal!! Paint removal is fraught with unknowns (hence the potential for confrontation!) such as what sort of paint and how many different coats etc. Different paint types need different chemicals to remove them, modern (the upper coats obviously) tend to be acrylic or oil based and these can be tackled with organic solvents or strong alkaline chemicals, older (mid layer) coatings can be cement based (Snowcem etc) or lime based (distemper or whitewash) – these are the hardest to remove as the lime or cement needs to be broken down either physically (JOSS/TORC abrasive cleaning) or chemically with hydrochloric acid – a very time consuming task. Then there are the base coats often used as damp proofing on the lower sections of walls – these are usually tar or bitumen based (sometimes mixed with cement) and again a strong solvent chemical is best for removing these.