Bourne Court was a project that ran in tandem with a second demolition of separate buildings located across the road in Acol Crescent. Both sites were owned by the same client and separate methodologies were prepared for each. The buildings on the Acol Crescent site were of a traditional construction with brick and block walls and a combination of pitched tiled and a flat roof. The buildings served as a former day care centre in Ruislip and were to be demolished as part of a redevelopment scheme involving a new three storey building for social housing. The two existing buildings were to be soft stripped, have cement bonded asbestos removed, followed by the demolition of both structures in line with agreed methodologies with the client.
Loose contents from within the structures, including furniture, appliances and general waste were removed by hand in a controlled manner and arisings managed in accordance with the Site Waste Management Plan. Door frames and skirting boards were removed by using bar and sledge hammers. Only operatives who had received class two asbestos training undertook removal of the asbestos products. Dust suppression systems were positioned within the working area and used to wet the roof sheets before and during the removal.
A 360-demolition excavator with a grab attachment was positioned at the rear of the structure, all voids in the ground such as manholes and sewers were back filled to ensure the ground was suitable. Deconstruction of the structures commenced by removing the roofs to the end of the buildings, these were removed by the excavator and materials generated were stock piled away from the demolition area. To minimise the environmental impact of general dust to neighbouring residential communities, a dust suppression system was set up near the excavator. Using a hydraulic grab attachment, the roof purlins were lifted out, this exposed the under cloaking around the edge of the roof. The asbestos supervisor monitored the work at all times.
Once the roof had been removed on each building, the grab was positioned over the top of the wall, each grab was lowered to ground level. A handheld killer sprayer was used to wet the brick and any asbestos cement products that were present. A fully trained operative carefully moved each brick and picked out pieces of asbestos and placed them in asbestos bags.
The site, along with Bourne Court, was cleared on time, within budget and handed back to the client ready for the next stage of development.