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Low density asbestos fibre board
Low density asbestos fibre board (LDB) is a lightly compressed board which looks similar to asbestos cement (AC) sheeting or plasterboard. It is different because it can be easily bent by hand or dented by soft pressure. It is also sometimes referred to as asbestos insulating board.
For more information call Workplace Health and Safety Queensland on 13 QGOV (13 74 68).
LDB was manufactured from the 1950s to the 1970s as flat and perforated sheet products and was used for wall and ceiling panels, thermal and acoustic insulation, fire protection and for general building work in industrial and commercial buildings, education facilities and domestic premises. It was sold under product names such as ‘Asbestolux’ and ‘Duralux’ and is unlikely to be found in buildings constructed after 1982. See the LDB photo gallery for more information.
LDB contains up to 70 per cent by volume of asbestos fibres and is generally composed of amosite (brown asbestos) and chrysotile (white asbestos) in a calcium silicate plaster. If in good condition and left undisturbed, LDB presents a relatively low risk of releasing asbestos fibres and causing harm. However, because it is softer than AC sheeting, LDB can break up more easily when disturbed, which increases the likelihood of exposure to airborne asbestos fibres.
LDB tends to bend or flex when pressure is first applied and then will tear rather than snap once it reaches its breaking point. Nails and other fasteners cannot easily be removed from LDB without it tearing and breaking into very small pieces. Maintenance and service tasks, such as sawing, cutting or drilling into LDB without appropriate controls can result in a significant release of asbestos fibres.
Read more on identifying and handling low density asbestos fibre board (LDB) (PDF, 223 KB).
Removal of LDB
LDB is a friable asbestos containing material (ACM) and must only be removed by a class A licensed asbestos removalist.
Maintenance and service work on LDB
The following maintenance and service work on LDB is permitted when done in accordance with LDB approved methods that were approved by Workplace Health and Safety Queensland (WHSQ):
- Minor repairs and minor damage to low density asbestos fibre board (PDF, 234 KB)
- Painting undamaged low density asbestos fibre board (PDF, 189 KB)
- Drilling holes up to 30mm in diameter into low density asbestos fibre board (PDF, 203 KB)
- Temporarily moving a low density asbestos fibre board ceiling tile (PDF, 218 KB)
- Installing or removing fixtures or fittings to low density asbestos fibre board (PDF, 205 KB).
The maintenance and service work described in the LDB approved methods does not have to be performed by a class A licensed asbestos removalist. However, workers must be familiar with the LDB approved methods and be competent to perform the work.
Training and competencies for maintenance and service work on LDB
The Work Health and Safety Regulation 2011 (the Regulation) requires all workers carrying out asbestos-related work are trained in the identification and safe handling of, and suitable control measures for, asbestos and ACMs.
Training in relation to maintenance and service work on LDB must include:
- identifying LDB
- donning and removing personal protective equipment
- decontaminating equipment and the work environment and personal decontamination
- transport and disposal of asbestos waste.
Some maintenance and service work on LDB (e.g. drilling holes) also requires training in:
- use and maintenance of a H-Class vacuum cleaner
- shadow vacuuming.
The minimum mandatory performance criteria for these training elements can be found in the low density asbestos fibre board approved method training record (DOCX, 802KB).
The training can be standalone in content or incorporated within other training programs or packages, and provided directly by an employer, a training provider engaged by an employer or a registered training organisation, as long as it meets the training elements and performance criteria.
Employers must keep documentation of their workers’ LDB training record and provide it to Workplace Health and Safety Queensland inspectors on request. Workers must complete LDB training every five years and must be competent in each of the training elements outlined in the low density asbestos fibre board approved method training record (DOCX, 802KB), as well as competent to perform the trade related skills relevant to each of the approved methods.