Internal asbestos removal
The internal asbestos removal process involves creating a negative air environment to ensure that no fibres escape during the removal works.
The first step in this process is to seal the house. There are two methods currently being used by contractors engaged by the Taskforce.
One method involves placing plastic sheeting on the roof and sealing all windows and vents.
The other method involves using shrink wrap to encapsulate the entire house.
Once the houses are sealed, negative air pressure units are placed in windows and doors. These units generally operate for about five days during the asbestos removal stage.
Air monitors are installed on perimeter fences prior to asbestos removal works commencing. They remain in place until the completion of structural demolition. For more information see the Air Monitoring and Dust Suppression InfoSheet.
Under negative air conditions the house is deconstructed internally. Ceilings and walls are pulled away to expose the cavities where loose fill asbestos fibres have settled.
Asbestos fibres are then vacuumed and sealed in heavy duty plastic bags. The bags are processed through a decontamination unit and transported to a special asbestos disposal site at the Mugga Lane Resource Management Centre.
The remaining internal structure of the house is then coated with a coloured PVA glue or paint to bind any residual fibres to the structure prior to demolition.
The contractors will also remove any non-friable or bonded asbestos prior structural demolition. This does not need to happen under negative air conditions but must be carried out with appropriate controls in place, including the use of protective equipment.
The house is demolished only when a clearance certificate for both friable and non-friable asbestos removal has been issued by an independent licensed asbestos assessor.