PART F1

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PART F1 Paul McAteer Lisburn Building Control

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Presentation Content

• The background to new Part F
• Format of Technical Booklet F1
• New dwellings
• Existing dwellings
• Extensions
• Renovations
• Change of Use
• Controlled Services
• Conservatories and Highly glazed extensions

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Background to the new Part F

• The successful implementation of the Building
  Regulations is essential in order to deliver the
  improvements in building energy efficiency,which
  are at the heart of the UKs carbon emission
  targets and energy policy objectives

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Drivers behind the amendments to the Building
Regulation Part F

• Climate change,
• Global Warming,
• Reduction of Green House Gases, and
• Security of Energy Supply

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Global scale

• 1979 First World Climate Conference
• 1988 - Resolution 43/53, Protection of global
  climate for present and future generation of
  mankind
• 1997 December The Kyoto Protocol set out basic
  rules outlining binding commitments
• To achieve a global GHG reduction of 5.2 below
  1990 levels with individual targets for each
  participating country
• 2004 September 30th Russia ratified the Kyoto
  Protocol.

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European Scale

• 2005 February 16th The Kyoto Protocol came into
  effect binding Parties to legal commitments to
  reduce green house gas emissions.
• 1995 EU White Paper
• 2000 EU Green Paper
• Security of EU Fuel Supply
• Dec 2002 Directive on Energy Performance of
  Buildings
• Nov 30th 2006 Building(Amendment) Regulations
  (NI) 2006 came into force

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UK Scale

• 2003 February UK published its White Paper
  Energy White Paper
• containing objectives to
• Reduce carbon dioxide emissions by 20 below 1990
  levels by 2010
• Cut carbon dioxide emissions by between 15 25
  million tonnes by 2020 and
• Reduce carbon dioxide emissions by 60 below 1990
  levels by 2050.

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Percentage Grouping of EU building Stock
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of CO2 emissions from EU building stock
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Percentage grouping of energy demand in EU
building stock
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Building Regulation Part F Common Items

• Elemental Method and Target U value Method are no
  longer acceptable to show compliance for new
  build!
• Whole Building Approach is the new method used to
  satisfy Part F
• The Whole Building Approach is based on the
  National Calculation Methodology as set out in
  the Directive 2002/91/EC on The Energy
  Performance of Buildings (EPBD)

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Building Regulation Part F Common Items
4 Step Progression towards Whole Building Approach
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New Terms Definitions

• Building Work now refers to any change to a
  buildings energy status
• Conservatory gt30sqm, in Part F , has to be
  thermally separated from the dwelling.
• DER Carbon dioxide emissions rate (as built)
• Fixed building service Any part of or controls
  associated with fixed internal of external
  lighting or fixed heating/hot water service,air
  conditioning or mechanical ventilation

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New Terms Definitions

• Dwelling A house flat or maisonette which is self
  contained to serve one family
• Renovation provision of a new layer or
  replacement of an existing layer of a thermal
  element included under regularisation certificate
• SAP Energy rating 2005 edition to calculate the
  target actual CO2 emissions from a dwelling
• TER Target Carbon Dioxide Emission rate
• Thermal Element wall roof or floor which
  separates a thermally conditioned space from the
  external environment

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Part A Interpretation General

• Building Regulation A8A A8B
• Where a thermal element is RENOVATED or REPLACED
  Part F shall apply in relation to it.
• (e.g. re-plastering an external wall or
  re-slating a roof)
• Any change in a BUILDINGS ENERGY STATUS,
• works to be carried out to Part F, as it
  relates to the calculation of TER.

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Part A Interpretation General

• Building Regulation A10 Giving of notices
  deposit of plans Schedule 2
• The requirement to submit a SAP calculation with
  the Building Control application has been omitted
• Does require a DER (design) TER to be submitted
  with the Building Control application

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Part A Interpretation General

• Building Regulation A11 Notice of Commencement
  Completion of work stages
• Still requires the builder to give Building
  Control notice in writing of the SAP energy
  rating for the completed dwelling within 5 days
  of completion.
• The SAP rating is now known as the Energy Rating
  ( 0 100)
• On completion, the builder is required to give
  Building Control notice in writing of the
• DER (as built) and TER

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DER TER Resume

• TER is the minimum acceptable standard for a
  typical (notional) dwelling
• Heating Hot water Ventilation Building fabric
  Fixed internal lighting, etc
• DER ? TER
• TER and DER must be calculated using the same
  software
• Two DER calculations are required
• 1st DER (design) at Building Control application
  stage
• 2nd (as built) at Dwelling Completion stage
• The DER (as built) must incorporate
• Any changes from the design DER
• Measured air permeability
• Fan performances, Ductwork leakage, as
  commissioned

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Common Areas

• Heated
• TBF2 is required to assess the heated common
  areas ie, circulation route between flats
• Not Heated
• If the dwelling common areas are not heated,
  thenTBF1 SAP 2005 are to be used

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Multiple Dwellings

• An average TER may be used compared against the
  average DER
• An individual energy rating is to be calculated
  for each dwelling
• Developments of 2 dwellings or less can avoid air
  testing if
• Same builder has built similar building in NI
  within past 12 months which has already been
  tested
• Value of 15m3/(hm2) _at_50Pa used to calculate the
  DER

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Technical Booklet F1
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Technical Booklet F1 Format Content

• Section 1 Common items
• Section 2 New Dwellings
• General
• Target carbon dioxide Emissions Rate (TER)
• Calculating the notional CO2 emissions and the
  TER
• Criterion 1 Achieving the TER
• Criterion 2 Minimum acceptable standards
• Criterion 3 Limiting the effects of solar gains
• Criterion 4 Quality of design, construction and
  commissioning
• Criterion 5 Operating and maintenance
  instructions

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Technical Booklet F1 Format Content

• Section 3 Existing Dwellings
• General
• Extension to dwellings
• Standards Based Approach
• Calculated Trade-off Approach
• Equivalent Carbon Target Approach
• Material change of use
• Standards Based Approach
• Equivalent Carbon Target Approach
• Controlled services
• Operating and maintenance instructions

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Additional Guidance

• TBF1 Appendix A H
• Extensive use of second tier documents
• Reference to many third tier documents

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Technical Booklet F1 New Dwellings
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Key Features for New Dwellings

• 40 reduction in CO2 emissions - compared to
  Technical Booklet F 1998
• Single method of compliance - Whole building
  approach for CO2 emissions target.
• Extensive design freedom within the target
• More control of solar overheating
• More control of construction quality
• Accredited construction details
• Improved treatment of thermal bridging
• Sample pressure testing
• Provision of information
• To Building Control
• To the owner or occupier

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Demonstrating Compliance for Domestic New Build

• Design Stage
• Criterion 1 Achieving the TER
• Criterion 2 Minimum acceptable standards
• Criterion 3 Limiting the effects of solar gains
• Construction Stage
• Criterion 4 Quality of design, construction and
  commissioning
• Criterion 5 Operating and maintenance
  instructions

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Building Regulation Part F New Dwellings

• Criterion 1 Achieving the TER

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Achieving the TER

• DER less than or equal to TER
• For mains gas, renewable energy and solid
  multi-fuels
• TER ((CH x Ff) CL) x (1 If)
• For all other fuels
• TER ((1.14 x CH x Ff) CL) x (1 If)
• Where
• CH heating and hot water emissions (SAP)
• Ff fuel factor
• CL internal lighting emissions
• If improvement factor (set at 0.2 i.e. 20)

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Achieving the TER

• Fuel Factors

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Achieving the TER

• Design DER calculation
• Part of Full Plans or Building Notice
  submission
• based on drawings and specifications
• including design air permeability
• by SAP (2005) assessment
• As-built DER calculation
• Dwelling Carbon Dioxide Emissions Rate
• Submitted upon completion
• based on dwelling as constructed
• tested air permeability
• by SAP (2005) assessment

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Minimum Acceptable Standards

• Criterion 2 Limits to Design Flexibility

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Minimum Acceptable Standards

• Design limits
• Fabric
• thermal transmittance (U values)
• apply to dwelling and any unheated common parts
• thermal bridging
• air permeability
• Services
• heating appliance efficiencies
• heating and hot water controls
• insulation of pipes, ducts and vessels
• Ventilation and cooling
• lighting

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Minimum Acceptable Standards

• Design limits

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Building Regulation Part F New dwellings
Design Limits max U values W/m2K Average
(individual)
0.25 (0.35)
Loft
0.25 (0.35)
2.20 (3.30) including glazed doors
0.35 (0.70)
0.25 (0.70)
0.25 (0.70)
0.35 (0.70)
0.25 (0.70)
Unheated space
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Minimum Acceptable Standards

• Design limits for Air Permeability
• Air permeability maximum of 10 m3/(h.m2) _at_ 50 Pa
• Developments of 2 dwellings or less can avoid the
  air test if
• Same builder and similar building built in
  Northern Ireland within past 12 months and
  already tested, or
• Use of a value of 15 m3/(h.m2) _at_ 50 Pa when
  calculating the DER, in which case compensating
  measures will be necessary to achieve the TER

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Minimum Acceptable Standards

• Heating and Hot Water Systems appliances
• require an increased level of efficiency
• Mains Gas or LPG boiler 86
• Oil boiler 82 up to 1st April 2007. After 1st
  April 2007 86
• Refer to in the Domestic Heating Compliance Guide
• Heating and Hot Water Controls
• Full zone control to Primary Heating System
• Interlock cylinder stat independent timer to
  Domestic Hot Water
• Insulation of pipes, ducts and hot water cylinder
  in accordance to Domestic Heating Compliance
  Guide

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Minimum Acceptable Standards

• Fixed Internal Energy Efficient Lighting
• Must be fitted in the most frequented areas in
  the dwelling
• One per 25m2 or
• One per four light fittings
• External Fixed Lighting
• Permanently fixed to surface of dwelling
• Maximum output of 150W
• Automatically switch off
• When adequate daylight
• When not needed at night

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Criterion 3 Limiting the effects of Solar Gain
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Limiting the effects of Solar Gains

• To reduce the need for cooling by reducing the
  risk of solar gains resulting in high internal
  temperatures
• SAP 2005 Appendix P refers to various measures
• Effective air change rate
• Regional external summer mean temperatures
• Solar shading
• Blinds or curtain type
• Opening overhangs
• Width / depth ratio of openings
• Orientation of openings
• Thermal Mass Parameter of structure
• SAP 2005 software will produce a check. High
  does not comply

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Criterion 4 As Built Performance

• Quality of Design, Construction and Commissioning

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Quality of Design,Construction Commissioning

• Fabric performance in terms of
• Thermal Bridging
• Air tightness
• Dwelling must be constructed to
• Accredited Construction Details or BRE IP 1/06
• Builder must demonstrate that an appropriate
  system of site inspection is in place.
• Where Accredited Construction Details approach is
  adopted
• A report shall be provided and a copy forwarded
  to Building Control

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Quality of Design,Construction Commissioning

• Air permeability testing
• Test to be carried out by suitably qualified
  person
• If development built to accredited details
• Pressure test for ONE of each dwelling type
• Dwelling selected by Building Control

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Building Regulation Part F New dwellings

• Example of an Accredited Construction Detail

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Quality of Design,Construction Commissioning

• For developments NOT built to Accredited
  Construction Details
• Pressure test each Dwelling type as set out in
  Table 2.4. To be selected by Building Control in
  consultation with builder.
• Half of the tests to be in first 25 of dwelling
  type

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Quality of Design, Construction Commissioning

• Failure to meet dwellings design Air
  permeability
• -remedial measures to be carried out to achieve
  compliance plus one additional dwelling of the
  same type
• must be tested.
• Remedial measures are less onerous up to 31st
  October 2007.
• These measures are described in TBF1
• 75 improvement or
• within 15 of the design Air Permeability or
• Revise the TER (current software may not permit
  the TER to be revised)

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Quality of Design,Construction Commissioning

• Heating and Hot Water Systems
• Designed, installed and commissioned.
• Fixed building services
• Commissioned in accordance with Domestic Heating
  Compliance Guide
• A Notice confirming commissioning must be
  provided copy given to
• District Council, and
• Building owner
• The Notice must be signed by a suitably qualified
  person.

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Criterion 5 Operating Maintenance Instructions
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Operating Maintenance Instructions

• Suitable operation and maintenance instructions
  should be provided for the building and its
  services
• To enable
• Efficient use of the energy systems
• An energy notice, setting out the rating should
  be provided to Building Control
• Energy Rating Notice to be fixed within the
  dwelling (i.e. adjacent to the electrical
  distribution board)

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Operating and Maintenance Instructions
Example of Energy Rating Notice
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TBF1 Extended Application

• Domestic Extensions
• Including conservatories gt 30m2
• Material Changes of Use
• When other building types become dwellings
• Thermal Elements
• Walls,floors and roofs
• Controlled Fittings
• Windows, rooflights and doors

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New Terminology

• Replacement of thermal elements
• External walls,floors roofs constructed by way
  of replacement
• Renovated thermal elements
• Thermal element where more than 25 of the
  surface is being renovated
• Retained thermal elements
• An existing thermal element now incorporated into
  the dwelling
• Controlled fittings
• Windows,rooflights and doors

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Extensions to Dwellings
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Domestic Extensions 3 Alternative Approaches

• Standards Based Approach
• Calculated Trade-off Approach
• Equivalent Carbon Target Approach

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Building Regulation Part F Extension to
Dwellings

• Standards Based Approach

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Extension to Dwellings Standards Based Approach

• Area of Openings
• Should NOT exceed the sum of
• 25 of the floor area of the extension plus
• Area of any window, roof windows, roof-light or
  doors which no longer exist as a result of the
  extension.

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Extension to Dwellings

• Controlled Fittings
• Windows, roof windows, roof-lights or doors to be
  draught-proofed units with average area weighted
  performance not greater than

SAP Table 6e gives values for different window
configurations that may be used in absence of
test data or calculated values.
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Extension to Dwellings

• Provision of thermal elements
• New walls, floors, roofs as part of extension to
  have
• U-value lt than Table 3.2 column (a)
• or part of individual element U-value lt Table 3.4
  Column (b)

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Extension to Dwellings

• Provision of thermal elements
• Replacement walls, floors, roofs as part of
  extension to have
• U-value lt column (b) Table 3.2 ,
• or part of individual element U-value lt column
  (b) Table 3.4

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Extension to Dwellings

• Continuity to limit thermal bridging and air
  leakage
• Similar to new build
• The building fabric must be constructed
• In accordance with Accredited construction
  details,
• Or, in accordance with BRE IP 1/06
• The builder must demonstrate that an appropriate
  system of site inspection is in place
• Copy of report must be given to District Council

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Extension to Dwellings

• Renovation of thermal element
• 25 rule
• Where more than 25 of the surface area of a
  thermal element is being replaced, the WHOLE of
  that element must be upgrade to the improved
  U-value given in column (b) of Table 3.3
• Examples include
• Re-plastering external wall
• Re-slating roof
• Re-skimming a ceiling
• 15 year simple payback rule
• Applicant to prove that the upgrading is not
  technically or functionally feasible. The result
  will be a compromise upgrade which has a simple
  payback period of 15years.(See Appendix C)

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Extension to Dwellings

• Retained of thermal element
• Existing thermal element becomes part of
  dwelling as result of a material change of use or
  becomes part of the thermal envelope
• and U-value gt column (a) table 3.3 the element
  must be upgraded to values as given in column (b)
  table 3.3.
• 15 year rule
• Applicant to prove that the upgrading is not
  technically or functionally feasible. The result
  will be a compromise upgrade which has a simple
  payback period of 15years.(See Appendix B C)
• 5 rule
• Upgrading to the above standards reduces usable
  floor
• area gt5, or where additional insulation would
• create floor level/ structural/ condensation
  difficulties.

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Extension to Dwellings

• U-values for retained thermal elements
• see Table 3.3

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Extension to Dwellings

• Calculated Trade-off Approach

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Extension to Dwellings

• Calculated Trade Off
• Thermal Elements Controlled Fittings
• Not to exceed the Area weighted U value

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Extension to Dwellings

• Calculated Trade-off Approach
• Table 3.4 Limiting U-values

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Extension to Dwellings

• Equivalent Carbon Target Approach

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Extension to Dwellings

• Equivalent Carbon Target Approach
• SAP used to demonstrate proposed extension
  dwelling no worse than a notional dwelling of
  same size /shape
• Permits thermal upgrading of existing dwelling
  elements

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Building Regulation Part F Conservatories and
Highly Glazed Spaces
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Conservatories and Highly Glazed Spaces as part
of a Dwelling

• The thermal performance of the dwelling shall be
  assessed excluding the conservatory.
• Conservatory must be thermally separated for the
  dwelling by walls, windows and doors having
  U-values not greater than and draught-proofing
  provisions not less than those of similar exposed
  elements.
• Where a highly glazed space is not thermally
  separated from the dwelling, it shall be included
  as an integral part of the dwelling.

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Conservatory Extension

• Non-exempt Conservatory must have-
• effective thermal separation from the dwelling by
  walls, windows and doors that are insulated and
  draught-proofed to at least the same standard as
  the same elements in the existing dwelling
• Glazed elements that comply with Table 3.1 column
  (b)
• Thermal elements that comply with Table 3.2
  column (b)

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Conservatory Extension

• Where a heating system is installed, the heating
  appliance must comply with Domestic Heating
  Compliance Guide, and heating system in the
  conservatory to have
• independent on/off and temperature controls
  separate from those on the existing dwelling.

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Conservatories to Dwellings

• Highly glazed extensions.
• Highly glazed extension that is thermally
  separated from the dwelling may be treated as a
  conservatory-
• Effective thermal separation from the dwelling
• Glazed elements that comply with Table 3.1 column
  (b)
• Thermal elements that comply with Table 3.2
  column (b)

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Conservatories to Dwellings

• Where a heating system is installed, the heating
  appliance to comply with Domestic Heating
  Compliance Guide
• The heating system in the conservatory shall
  have independent on/off and temperature controls
  separate from those on the existing dwelling

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Conservatories to Dwellings

• Highly glazed extensions.
• Highly glazed extension that is
• not thermally separated from the dwelling may be
  treated as a
• conventional extension.

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Material Change of Use
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Material Change of Use to Dwellings

• Two alternative approaches
• Standards Based Approach and
• Equivalent Carbon Target Approach

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Material Change of Use to Dwellings

• An Energy Rating must be calculated for the
  dwelling AS BUILT and a NOTICE displayed similar
  to new build.
• New regulation A8B Application to a change to a
  buildings energy status must now also be
  applied.
• Therefore TER and DER calculations are required
  for change of use applications.

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Building Regulation Part F Controlled Services
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Heating Hot Water Systems

• Heating appliance to be replaced new appliance
  must have an efficiency of not less than 86
• Appliance to have controls that meet the minimum
  control requirements given in DHCG.
• Systems to be designed, installed and
  commissioned
• Notice confirming the system has be properly
  commissioned to be provided to District Council
  and to the Building Owner
• Notice to be signed by a suitably qualified
  person

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Fixed Internal External Lighting

• Similar to new build
• The requirements apply-
• Solely to the extension
• or
• Material change of use whole dwelling
• or
• replacement lighting system which
• forms part of re-wiring works.

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Operating Maintenance Instructions

• Building owner must be given sufficient
  information to enable the dwelling to be operated
  and maintained in an energy efficient manner.
• The instructions to be directly related to the
  specific system(s) installed and readily
  understandable by
• the occupier eg
• How to make adjustments to timing and
• temperature control settings
• What routine maintenance necessary to enable
• the systems to maintain at reasonable
  efficiency
• throughout their service life

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Mechanical Systems

• Mechanical Ventilation
• To Good practice guide GPG 268
• Fan power/heat recovery efficiency to Table 2.3
• Mechanical Cooling
• Systems energy efficiency n.l.t Class C, schedule
  3,labelling scheme, Energy info Regulations

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Insulation of Pipes,Ducts and Hot Water Storage
Vessels

• Generally similar to new build and in
  accordance with requirements given in DHCG.
• Replacing heating appliance or hot water storage
  vessel any pipes that a exposed as part of the
  works or are otherwise accessible should be
  insulated that meet the minimum requirements
  given in DHCG

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Thank you
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