Cellulose Fibre
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Types and Durability
| Description
Cellulose fibre |
Expected Lifespan
(Years) |
Adjustment Factors |
| Cellulose fibre to BS 5803 Part 3 for blown installation. | 35 | Test certificate from approved local testing authority : +5 years |
| Cellulose fibre not to BS 5803 Part 1 and/ or not designed for proposed use | < 10 | None |
Note: For more details, refer to Roof Insulation Requirement