Mineral Board
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Types and Durability
| Description
Mineral fibreboard |
Expected Lifespan
(Years) |
Adjustment Factors |
| Resin bonded mineral wool, factory finished (e.g. with fabric, aluminum foil, glass tissue laminated), approved for particular application | 25 | Routine access to ceiling void (more than twice/ year: -30% years
Excessive exposure to steam and moisture or under category ‘high humidity‘ to BS8290:Part 2: – 15% years Near overhead pipe: – 10% years. Test certificate from approved local testing authority : +15% years |
| Resin bonded mineral wool, factory finished (e.g. with fabric, aluminum foil, glass tissue laminated). | 20 | |
| Less than above specification | < 20 | None |
In case of 2 or more conditions of adjustment factor occur, the percentage of year shall be added.
Note: Certain types of board are unsuitable for damp or humid environments. Reference should be made to manufacturer guide.
BS 8290:Part 2 specifies the method for measuring the manufacturing tolerances (dimensional accuracy, squareness and flatness) of tiles, panels, etc. and includes for conditioning under the following environments:
- Normal: Relative humidity 65 ± 5% at 25 ± 2°C for 36 hours.
- High humidity: Relative humidity 90 ± 5% at 25 ± 2°C for 24 hours.
BS 8290 provides useful complementary information to this work section:
- Part 1 deals with design issues generally.
- Part 2 specifies materials, manufacturing tolerances and strength requirements for suspension grids.
- Part 3 deals with installation issues. Other sources of information include the Specialist Ceilings and Interiors Association (SCIA) guides and Health Technical Memorandum 60.