Technical Booklet E Fire Safety·Page 156·5.24
Space separation requirements for roofs
Roof coverings must be positioned at minimum distances from relevant boundaries based on their fire performance classification. The minimum distance requirements range from no restriction for the best-performing classes (AA, AB, AC nationally or BROOF(t4) in Europe) up to 20 m for the poorest-performing classes (DA, DB, DC, DD nationally or FROOF(t4) in Europe).
The minimum distance from any part of a roof, other than a plastic rooflight, to a relevant boundary (see paragraph 5.9) should be not less than that given in Table 5.7 for the relevant designation of roof covering. There are no restrictions on the use of roof coverings designated AA, AB or AC (National class) or BROOF(t4) (European class). In addition, roof covering products (and/or materials) as defined in Commission Decision 2000/553/EC implementing Council Directive 89/106/EEC as regards the external fire performance of roof coverings can be considered to fulfil all of the requirements for performance characteristic "external fire performance" without the need for testing provided that any national provisions on the design and execution of works are fulfilled. That is, the roof covering products (and/or materials) defined in this Commission Decision can be used without restriction. The boundary formed by the compartment wall separating semi-detached dwellinghouses should be disregarded for the purposes of this paragraph.
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