Boiler Flues in buildings above 18 metres

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This topic contains 4 replies, has 3 voices, and was last updated by  Trevor Percy 9 months, 1 week ago.

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  • #9658

    Kim Morris
    Moderator

    Safety Information

    Government ban on combustible materials in high-rise residential buildings

    The Government has amended the Building Regulations to prohibit the use of combustible materials in the external walls of buildings in England over 18 metres that contain at least one dwelling. This ban is the result of a review of fire safety, following the Grenfell tower tragedy.
    The Building (Amendment) Regulations 2018, came into force on 21st December 2018 and will apply to all residential accommodation projects that started on site after 21st February 2019 with some exceptions.
    Where building work started before 21st February 2019, in line with plans deposited with a local authority before 21st December 2018, the previous Building Regulations will apply.
    The Building (Amendment) Regulations 2018 states that building work shall be carried out so that materials which become part of an external wall are of European Classification “A2-s1, d0” or “A1”. These classifications are taken from BS EN 13501-1:2007+A1:2009, Fire classification of construction products and building elements – Classification using test data from reaction to fire tests.
    Although there is a list of work activities that this amendment does not apply to, gas boilers and their flues are not exempt.
    As a result of this amendment, conventional condensing boiler flues with a polypropylene inner duct will not meet this criteria and therefore will be prohibited, as will waste pipes, condensate discharge pipes, PRV pipework etc constructed of a similar material.
    Currently, there are no products on the market that will meet the new regulations in terms of flues in high rise dwellings due to the new definition of external walls. Please be aware that it will not be possible to install or replace a condensing flue until further guidance has been sought from the manufactures, local building control office and a competent fire engineer.

    #9659

    Trevor Percy
    Participant

    Any advice on what you or others are doing to replace boilers in high rise at present would be appreciated.

    I’ve got a single boiler that needs replacing in a void and a block of 72 units I’m planning to re-clad and all 72 flues will need altering to accomodate the new cladding.

    Thanks, Trevor.

    #9672

    Trevor Batt
    Moderator

    Following on from our news bulletin last week on boiler flues in high-rise dwellings, which relates to the ban on the use of combustible materials in the external walls of such dwellings (>18m), we have been made aware of the following details from MHCLG on the subject:

    MHCLG has received a large number of enquiries on the subject including many from local authorities and in the interim, local authorities should consider if they may be able to utilise Section 8 of the Building Act to potentially relax requirements of the regulations on a case by case basis where it is considered that the requirements would be unreasonable in a particular circumstance.

    It may be possible that gas boilers with plastic flue components could be considered in particular cases where the local authority is satisfied that the fire risk to the building is very low and alternative heating solutions would result in unreasonable hardship for consumers. Local Authorities must be reminded that any building work should not compromise wider building safety.

    Links to the relevant information can be found below:

    https://www.legislation.gov.uk/ukpga/1984/55/section/8

    https://www.legislation.gov.uk/uksi/2010/2214/regulation/11

    Whilst the information above may only apply to council or local authority work due to Section 8 of the Building Act, discussions continue and MHCLG and the Government are listening to concerns raised.

    If you have any specific questions or comments on this topic, please do post them in the forum of your member website where you will find a discussion thread on this topic.

    #9674

    Trevor Batt
    Moderator

    Following on from our news bulletin last week on boiler flues in high-rise dwellings, which relates to the ban on the use of combustible materials in the external walls of such dwellings (>18m), we have been made aware of the following details from MHCLG on the subject:

    MHCLG has received a large number of enquiries on the subject including many from local authorities and in the interim, local authorities should consider if they may be able to utilise Section 8 of the Building Act to potentially relax requirements of the regulations on a case by case basis where it is considered that the requirements would be unreasonable in a particular circumstance.

    It may be possible that gas boilers with plastic flue components could be considered in particular cases where the local authority is satisfied that the fire risk to the building is very low and alternative heating solutions would result in unreasonable hardship for consumers. Local Authorities must be reminded that any building work should not compromise wider building safety.

    Links to the relevant information can be found below:

    https://www.legislation.gov.uk/ukpga/1984/55/section/8

    https://www.legislation.gov.uk/uksi/2010/2214/regulation/11

    Whilst the information above may only apply to council or local authority work due to Section 8 of the Building Act, discussions continue and MHCLG and the Government are listening to concerns raised.

    If you have any specific questions or comments on this topic, please do post them in the forum of your member website where you will find a discussion thread on this topic.

    #9711

    Trevor Percy
    Participant

    Hi All,

    I’m hearing that a Building Control Officer is suggesting the use of an Intumescent Collar to overcome this issue.

    Any thoughts?

    Thanks, Trevor.

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