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Extension - must comply with building regulations at time of build?

  • 04-07-2017 12:52pm
    #1
    MAJJ
    Registered Users, Registered Users 2 Posts: 1,679 ✭✭✭


    Quick question please, new extension did not require planning, is it subject to the building Regs at the time of building?

    For example extension built on 2016 needs to comply with Regs from 2016 on insulation standards etc.

    Thanks


Comments

  • #2
    Gumbo
    Moderators, Society & Culture Moderators Posts: 40,366 Mod ✭✭✭✭Gumbo


    MAJJ wrote: »
    Quick question please, new extension did not require planning, is it subject to the building Regs at the time of building?

    For example extension built on 2016 needs to comply with Regs from 2016 on insulation standards etc.

    Thanks

    Yes. Time of Commencement of Construction applies.
    Insulation standards in 2016 were TGD Part L 2011.


  • #3
    MAJJ
    Registered Users, Registered Users 2 Posts: 1,679 ✭✭✭MAJJ


    kceire wrote: »
    Yes. Time of Commencement of Construction applies.
    Insulation standards in 2016 were TGD Part L 2011.

    Thanks a lot Kceire. Maybe reading into it but have those standards been around since 2011?


  • #4
    Gumbo
    Moderators, Society & Culture Moderators Posts: 40,366 Mod ✭✭✭✭Gumbo


    MAJJ wrote: »
    Thanks a lot Kceire. Maybe reading into it but have those standards been around since 2011?

    Yes.
    Part L for dwellings is rumoured to be changing next year. Should go out for public consultation before that.

    Part L for non domestic has been updated this year.


  • #5
    EmmetF
    Registered Users, Registered Users 2 Posts: 145 ✭✭EmmetF


    kceire wrote: »
    Yes. Time of Commencement of Construction applies.
    Insulation standards in 2016 were TGD Part L 2011.
    Keep in mind though that you're not confined to the strict requirements of Part L. You basically have to do the best you can, but not necessarily A3 rated.


  • #6
    sydthebeat
    Subscribers Posts: 42,172 ✭✭✭✭sydthebeat


    EmmetF wrote: »
    Keep in mind though that you're not confined to the strict requirements of Part L. You basically have to do the best you can, but not necessarily A3 rated.

    there is no prescribed BER rating to be achieved by a new build dwelling in Part L.

    actually id suggest Part L on a new build dwelling is actually stricter than pretty much all other regulations in that there is an exact calculation tool specified in the regulation... and if you dont comply in regard to that calculation tool... you dont comply period. (unless you argue compliance with another piece of software such as phpp.. but again its an either / or)

    there is no room for "stretching the elastic" in DEAP

    edit: and "doing the best you can" is awful advice


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  • #7
    Gumbo
    Moderators, Society & Culture Moderators Posts: 40,366 Mod ✭✭✭✭Gumbo


    EmmetF wrote: »
    Keep in mind though that you're not confined to the strict requirements of Part L. You basically have to do the best you can, but not necessarily A3 rated.

    Part L has a section for extensions and material alterations to existing dwellings. There is no prescribed BER rating to achieve but you must make reasonable effort to meet the elemental u values and minimize air leakage through the works.


  • #8
    EmmetF
    Registered Users, Registered Users 2 Posts: 145 ✭✭EmmetF


    sydthebeat wrote: »
    there is no prescribed BER rating to be achieved by a new build dwelling in Part L.

    actually id suggest Part L on a new build dwelling is actually stricter than pretty much all other regulations in that there is an exact calculation tool specified in the regulation... and if you dont comply in regard to that calculation tool... you dont comply period. (unless you argue compliance with another piece of software such as phpp.. but again its an either / or)

    there is no room for "stretching the elastic" in DEAP

    edit: and "doing the best you can" is awful advice
    I completely agree that Part L is one of the more onerous regulations to meet compliance, and no there is no rating threshold, but if you comply, you'll be A3 rated. Have you ever come across a B1 rated house that complies?

    I'm not advising "doing the best you can", I'm just saying that's the spirit of TGD Part L for existing buildings:

    - Limiting heat loss and where appropriate maximising heat gain.
    - Controlling the output of space heating
    - Limiting heat loss from pipes, ducts, vessels etc.
    - Providing that all oil and gas fired burners have a minimum efficiency of 90%

    There is no real requirement other than don't skimp on materials and construction method.


  • #9
    EmmetF
    Registered Users, Registered Users 2 Posts: 145 ✭✭EmmetF


    kceire wrote: »
    Part L has a section for extensions and material alterations to existing dwellings. There is no prescribed BER rating to achieve but you must make reasonable effort to meet the elemental u values and minimize air leakage through the works.
    And I've mentioned above, if you comply with Part L 2011, you will be A3 rated minimum. I've never come accross a B1 rated dwelling that complies and I've seen DEAP files that scrape the CPC and EPC requirement.


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