In this article we will look at the guidance for soffits in Approved Document B England, including which Kingspan Insulation products could be used in this application.
The information contained within this article should be used in combination with the full Building Regulations and Building Control where necessary.
Note that complying with the guidance in the Approved Document does not guarantee that building work complies with the requirements of the regulations. There may also be other ways to comply with the requirements than those described in the Approved Document. The project Principal Designer (during design stages), Principal Contractor (during construction) and relevant consultants (such as Fire Engineers) should be consulted to ensure compliance with the Building Regulations.
What guidance does Approved Document B give for insulation in soffit applications in England?
Approved Document B for England ‘Requirement B2: Internal fire spread (linings)’ provides guidance for internal linings. Internal linings means any materials used in lining any partition, wall, ceiling or other internal structure.
Insulation used in soffits should meet the European Classifications below:
Which Kingspan Insulation soffit board insulation could be used in England to meet the Approved Document B guidance?
AlphaCore Pad achieves Euroclass A2-s1,d0 and could be used to meet the guidance of Approved Document B, in all buildings in England, when installed correctly.
Kooltherm K110 Soffit Board achieves Euroclass B-s2,d0 when installed correctly (with the foil facing on the outside) and could be used to meet the guidance of Approved Document B, in all buildings in England.
Kooltherm K110 PLUS Soffit Board achieves Euroclass B-s1,d0 and could be used to meet the guidance of Approved Document B, in all buildings in England, when installed correctly.
Further information
The following links provide further information and guidance on the Building Regulations:
