New Building Regulations L1 and L2

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(No Transcript)
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New Building Regulations L1

• Presented by
• Robert Eglington
• Regional Director of MLM Building Control

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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

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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

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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

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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

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New Building Regulation L1

• Section 11 Code of practice on consultation
• Section 12 Response form

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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New Building Regulation L1

• Draft ADL1A Work in new dwellings
• Limiting U Value standards (W/m²K)

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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

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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

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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

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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

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New Building Regulation L1

• Section 3 Draft ADL1B Work in existing
  dwellings
• Standards for thermal elements (W/m²K)

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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

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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

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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

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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

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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

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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

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New Building Regulation L1

• Draft ADL2A Work in new buildings other than
  dwellings
• The proposals make pressure testing a legal
  requirement

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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

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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

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New Building Regulation L1

• Draft ADL2A Work in new buildings other than
  dwellings Table 4, limiting U-value standards

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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.

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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

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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

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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

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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

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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

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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

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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

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New Building Regulation L1

• Draft ADL2B Work in existing buildings other than
  dwellings

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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

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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

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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

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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

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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

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New Building Regulation L1

• Draft ADL2B Work in existing buildings other than
  dwellings

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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

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New Building Regulation L1

• Draft ADL2B Work in existing buildings other than
  dwellings

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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

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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

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New Building Regulation L1

• Implementation
• Transitional provisions
• These have not yet been confirmed and we await
  further advice from the ODPM

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New Building Regulation L1

• Any Questions?