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New Building Regulations L1 and L2

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New Building Regulations L1 Presented by Robert Eglington Regional Director of MLM Building Control New Building Regulation L1 The new Regulations have been published ... – PowerPoint PPT presentation

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Title: New Building Regulations L1 and L2


1
(No Transcript)
2
New Building Regulations L1
  • Presented by
  • Robert Eglington
  • Regional Director of MLM Building Control

3
New Building Regulation L1
  • The new Regulations have been published and the
    approved documents are currently in draft form
    only
  • The proposed date of implementation of the
    changes is April 6 2006
  • We understand the Statutory Instrument and final
    documents will be published in March 2006

4
New Building Regulation L1
  • The ODPM issued the 300 page consultation
    document in July 2004
  • They invited comment from across the entire
    building industry including all professional
    bodies
  • The document was made up of 12 sections

5
New Building Regulation L1
  • Section 1 Regulatory impact assessment
  • Section 2 New document ADL1A
  • Section 3 New document ADL1B
  • Section 4 New document ADL2A
  • Section 5 New document ADL2B
  • Section 6 Possible future performance standards

6
New Building Regulation L1
  • Section 7 Implementation of the Energy
    Performance of Buildings Directive
  • Section 8 Calculations methodologies of the
    Energy Performance of Buildings Directive
  • Section 9 Adaptation Strategy
  • Section 10 Dissemination strategy

7
New Building Regulation L1
  • Section 11 Code of practice on consultation
  • Section 12 Response form

8
New Building Regulation L1
  • Draft regulatory impact assessment
  • An assessment of national benefits
  • An assessment of costs on certain building types
  • An indication of the impact on certain buildings
  • An explanation of the reasons behind the proposed
    changes

9
New Building Regulation L1
  • Draft regulatory impact assessment
  • Purpose to further improve the energy
    efficiency of buildings in response to the aim
    declared in the Energy White Paper and the aims
    set out in article 1 of the Energy Performance of
    Buildings Directive
  • Background the 2002 changes increased thermal
    performance by 25 at a increased cost of up to
    3 on construction

10
New Building Regulation L1
  • Draft regulatory impact assessment
  • Energy White Paper
  • To achieve substantial reductions in CO2
    emissions
  • Encouragement to improve in energy efficiency
  • Encouragement of the selection of energy sources
    and generating technologies that produce much
    less, or no, carbon

11
New Building Regulation L1
  • Draft regulatory impact assessment
  • Energy White Paper
  • The target is to achieve a 60 reduction in
    carbon emissions by 2050
  • Buildings account for 50 of UK carbon emissions
  • Savings in the construction of new buildings and
    to the upgrading of the existing stock can
    therefore be significant

12
New Building Regulation L1
  • Draft regulatory impact assessment
  • Energy White Paper
  • The plan is also for the future with a review
    every 5 years
  • Work has already commenced on the proposals for
    2010 to 2020

13
New Building Regulation L1
  • Draft regulatory impact assessment
  • Options
  • Option 1 Do nothing
  • Option 2 Information and Education
  • Option 3 Amending Part L of the Building
    Regulations

14
New Building Regulation L1
  • Draft regulatory impact assessment
  • Preferred choice Option 3
  • Amending the Building Regulations
  • Introducing other legislation to complete the
    transposition of the other elements of the EPBD -
    The Sustainable and Secure Buildings Act
  • Supportive training programme

15
New Building Regulation L1
  • Draft regulatory impact assessment
  • Extra costs for dwellings are estimated as being
    from 323 for flats to 1170 for a detached
    dwelling
  • Increased costs for commercial work are estimated
    at 19/m² and 7/m² for industrial buildings
    these costs do not include Consequential
    Improvements

16
New Building Regulation L1
  • Draft ADL1A Work in new dwellings
  • The new SAP 2005 will be the only way of showing
    compliance
  • Elemental and target U values will no longer be
    permissible as ways of showing compliance

17
New Building Regulation L1
  • Draft ADL1A Work in new dwellings
  • The new SAP will be a transparent calculation
    that will remove the ability of designers and
    checkers to interpret the guidance
  • There will be minimum U values imposed to
    constrain design opportunities
  • Sample air pressure testing will be imposed in a
    similar way to sound testing - major Housebuilder
    objections!
  • There may be a Robust Option as an alternative
    to the pressure testing regime

18
New Building Regulation L1
  • Draft ADL1A Work in new dwellings
  • The 5 criterion to showing compliance that will
    need to be followed are
  • Predicted carbon dioxide emission from proposed
    dwelling does not exceed the target

19
New Building Regulation L1
  • Draft ADL1A Work in new dwellings
  • The performance of the building fabric and the
    heating, hot water and fixed lighting systems
    should be no worse than the design limits
  • The dwelling has appropriate passive control
    measures to limit solar gains
  • The performance of the dwelling, as built, is
    consistent with the Dwellings Emissions Rate

20
New Building Regulation L1
  • Section 2 Draft ADL1A Work in new dwellings
  • The necessary provisions for energy efficient
    operation of the dwelling are put in place

21
New Building Regulation L1
  • Draft ADL1A Work in new dwellings
  • Limiting U Value standards (W/m²K)

22
New Building Regulation L1
  • Draft ADL1A Work in new dwellings
  • The air pressure test standard will be set at
    10m³/m² per hour at 50 Pa
  • There will be a honeymoon period for failure to
    meet this standard until 31 October 2007
  • Testing arrangements will be split into those
    using and those not using accredited construction
    details
  • Those that have adopted accredited construction
    details - a pressure test should be carried out
    on each dwelling type

23
New Building Regulation L1
  • Draft ADL1A Work in new dwellings
  • Dwellings that have not adopted accredited
    construction details
  • Testing to be minimum of
  • 2 units of each dwelling type in the development
  • 5 of each dwelling type can be reduced to 2
    if the testing was successful on the first 5
    dwellings tested
  • The sample to concentrate in the earlier
    completed dwellings of each type

24
New Building Regulation L1
  • Draft ADL1B Work in existing dwellings
  • Type of work covered by the approved document
  • Extensions
  • Creating a new dwelling through a material change
    of use
  • Material alterations to existing dwellings
  • The provision of a controlled fitting
  • The provision or extension of a controlled
    service
  • The provision or renovation of a thermal element

25
New Building Regulation L1
  • Section 3 Draft ADL1B Work in existing
    dwellings
  • Limiting U-value standards (W/m²K) for small
    elements
  • Eg Metre box scenario

26
New Building Regulation L1
  • Section 3 Draft ADL1B Work in existing
    dwellings
  • Standards for thermal elements (W/m²K)

27
New Building Regulation L1
  • Section 3 Draft ADL1B Work in existing
    dwellings
  • Window areas are restricted to 25 of the floor
    area of the extension plus the area of any
    windows or doors which, as a result of the
    extension works, no longer exist or are no longer
    exposed
  • Special options will be made to allow for
    conservatory type extensions

28
New Building Regulation L1
  • Section 3 Draft ADL1B Work in existing
    dwellings
  • Replacement boilers to be of a condensing type or
    traditional in some limited existing
    circumstances
  • Guidance is given on solar heating systems
  • Recommendations are made on water treatment in
    heating systems in hard water areas
  • Additional controls for high efficiency
    luminaires

29
New Building Regulation L1
  • Section 3 Draft ADL1B Work in existing
    dwellings
  • Historic Buildings
  • Special considerations can apply to
  • Listed buildings
  • Buildings in a conservation area
  • Buildings of local architectural or historic
    interest
  • Buildings within National Parks, areas
    Outstanding National Beauty and World Heritage
    sites

30
New Building Regulation L1
  • Draft ADL1B Work in existing dwellings
  • Renovation of thermal elements
  • Where more than 25 of the surface area of a
    thermal element is being renovated, a way of
    showing compliance with the regulation would be
    to upgrade the whole element in question

31
New Building Regulation L1
  • Section 4 Draft ADL2A Work in new buildings
    other than dwellings
  • The proposal is to raise the overall standard of
    energy performance by about 27
  • The elemental approach to design will no longer
    be acceptable
  • A nationally agreed methodology to achieve an
    overall energy performance standard must be
    adopted

32
New Building Regulation L1
  • Section 4 Draft ADL2A Work in new buildings
    other than dwellings
  • The proposed methodology will be more flexible
    and building specific - SBEM
  • The flexibility in the methodology will be
    constrained by a series of poorest acceptable
    benchmarks
  • The use of LZC heating systems are allowed for
    and compensation for their use are within the
    calculation method

33
New Building Regulation L1
  • Draft ADL2A Work in new buildings other than
    dwellings
  • The proposals make pressure testing a legal
    requirement

34
New Building Regulation L1
  • Draft ADL2A Work in new buildings other than
    dwellings
  • New regulations will be drafted requiring
    submission of certificates for the building and
    its systems
  • New regulations will be drafted requiring regular
    inspection of air-conditioning systems and the
    submission of reports

35
New Building Regulation L1
  • Draft ADL2A Work in new buildings other than
    dwellings
  • The calculation method for energy will a
    comparative study against the notional building
  • The carbon improvement in buildings will be up to
    20 with a further 10 allowance if no LZC energy
    systems are adopted
  • The air pressure test standard remains at
    10m³/m²h at 50 Pa

36
New Building Regulation L1
  • Draft ADL2A Work in new buildings other than
    dwellings Table 4, limiting U-value standards

37
New Building Regulation L1
  • Draft ADL2A Work in new buildings other than
    dwellings
  • A failure to meet air permeability tests can be
    made up for by re-examining the energy standard
    calculation and making any necessary adjustments
  • There will be honeymoon period for the testing of
    buildings under 1000m² until 31 October 2007.

38
New Building Regulation L1
  • Draft ADL2A Work in new buildings other than
    dwellings
  • As an alternative to air pressure testing on
    buildings under 500m² an allowance of 15m³/m²h at
    50 Pa can be used in the energy calculation
    method. Compensatory features can then be
    installed
  • Large, complex buildings may be subjected to an
    alternative approach to air pressure testing

39
New Building Regulation L1
  • Draft ADL2A Work in new buildings other than
    dwellings
  • There will be a 5 step approach for compliance
    applicable to new buildings
  • Predicted carbon dioxide emissions from the
    proposed building does not exceed the target
  • The performance of the building fabric and the
    building services system should be no worse than
    the design limits
  • The building has appropriate passive control
    measures to limit solar gains

40
New Building Regulation L1
  • Draft ADL2A Work in new buildings other than
    dwellings
  • The performance of the building, as built, is
    consistent with the Building Emission Rate
  • Providing information

41
New Building Regulation L1
  • Draft ADL2B Work in existing buildings other than
    dwellings
  • Types of work covered include
  • Consequential improvements
  • An extension
  • A material change of use
  • A material alteration
  • The provision or extension of a controlled
    service or fitting
  • The provision or renovation of a controlled
    element

42
New Building Regulation L1
  • Draft ADL2B Work in existing buildings other than
    dwellings
  • Where the work involves the first fit-out of a
    shell constructed under these guidelines the
    design should be as if it were all new-build
  • Allowances are made for Historic buildings

43
New Building Regulation L1
  • Draft ADL2B Work in existing buildings other than
    dwellings
  • Consequential Improvements - Regulation 17D.-(1)
    applies to a building with a total useful floor
    area over 1000m² where the building work includes
    an extension, fixed building services or an
    increase to the capacity of any fixed building
    services

44
New Building Regulation L1
  • Draft ADL2B Work in existing buildings other than
    dwellings
  • Where this regulation applies, such work, if any
    shall be carried out to ensure that the building
    complies with the requirements of Part L see
    Table 7 for trigger values
  • The regulation does not require anything to be
    done that is not technically, functionally and
    economically feasible this has been defined

45
New Building Regulation L1
  • Draft ADL2B Work in existing buildings other than
    dwellings

46
New Building Regulation L1
  • Draft ADL2B Work in existing buildings other than
    dwellings
  • Consequential improvements include
  • Where there is in increase in the installed
    capacity of heating or cooling plant -
  • To upgrade any thermal element served by the
    plant with increased capacity
  • To replace any existing window or door within the
    area served by the plant with increased capacity

47
New Building Regulation L1
  • Draft ADL2B Work in existing buildings other than
    dwellings
  • There is no limit to the value of this work where
    there is an increase in the installed capacity of
    the plant, only that it must be cost effective
    the 10 capital value rule does not apply
  • If the value of this work exceeds 10 then
    further consequential improvements are not
    required

48
New Building Regulation L1
  • Draft ADL2B Work in existing buildings other than
    dwellings
  • In addition the 10 rule, based on the value of
    the principal works, applies and requires certain
    other elements in addition to those previously
    mentioned, to be upgraded including
  • Heating and cooling systems more than 15 years
    old need to be upgraded or replaced
  • Inefficient lighting systems, to install energy
    metering
  • The provision of an LZC energy system as long as
    a 7 year simple payback can be shown

49
New Building Regulation L1
  • Draft ADL2B Work in existing buildings other than
    dwellings
  • When carrying out a Material Change of Use
    reasonable provision would be to include
  • Replacement windows
  • Controlled upgrading of any renovated thermal
    elements

50
New Building Regulation L1
  • Draft ADL2B Work in existing buildings other than
    dwellings
  • For extensions over 100m² and greater than 25 of
    the existing building ADL2A should be adopted
    this currently includes air pressure tests
  • For extensions less than 100m² alternative values
    given below should be adopted

51
New Building Regulation L1
  • Draft ADL2B Work in existing buildings other than
    dwellings

52
New Building Regulation L1
  • Draft ADL2B Work in existing buildings other than
    dwellings
  • Windows see table below
  • OR the ratio that is present in that part of the
    existing building to which the extension is to be
    joined

53
New Building Regulation L1
  • Draft ADL2B Work in existing buildings other than
    dwellings

54
New Building Regulation L1
  • The future
  • Our proposed standards are still lower than some
    other EU countries e.g. Denmark and Switzerland
  • Aspirational U values for 2010

55
New Building Regulation L1
  • The future
  • Air permeability standards are likely to be
    reduced to 5 or 7m³/m²h to bring us into line
    with standards currently in operation in
    countries such as Germany and Holland
  • It should be noted that in Switzerland the
    current standard is set at 3.6 m³/m²h

56
New Building Regulation L1
  • Implementation
  • Transitional provisions
  • These have not yet been confirmed and we await
    further advice from the ODPM

57
New Building Regulation L1
  • Any Questions?
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