Unprotected area
in relation to a side or external wall of a building
All of the following are classed as unprotected areas. • Any part of the external wall that has less than the relevant fire resistance set out in Section 11. • Any part of the external wall constructed of material more than 1mm thick if that material does not have a class B-s3, d2 rating or better, which is attached or applied, whether for cladding or any other purpose. • Windows, doors or other openings. This does not include windows that are designed and glazed to give the necessary level of fire resistance and that are not openable.
- Recessed car parking areas as shown in Diagram A1 should not be regarded as unprotected areas.
- The parking area should be both of the following: a. Open fronted. b. Separated from the remainder of the building by a compartment wall(s) and floor(s) having not less than the period of fire resistance specified in Table B2 in Appendix B.
Approved Document B Volume 1, Appendix A (page 138)
All of the following are classed as unprotected areas. • Any part of the external wall that has less than the relevant fire resistance set out in Section 13. • Any part of the external wall constructed of material more than 1mm thick if that material does not have a class B-s3, d2 rating or better, which is attached or applied, whether for cladding or any other purpose. • Windows, doors or other openings. This does not include windows that are designed and glazed to give the necessary level of fire resistance and that are not openable.
- Recessed car parking areas as shown in Diagram A1 should not be regarded as unprotected areas.
- The parking area should be both of the following: a. Open fronted. b. Separated from the remainder of the building by a compartment wall(s) and floor(s) having not less than the period of fire resistance specified in Table B2 in Appendix B.
Approved Document B Volume 2, Appendix A (page 149)
Related terms
Definitions are taken from Approved Document B (fire safety). Contains public sector information licensed under the Open Government Licence v3.0.
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