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PART F1 Paul McAteer Lisburn Building Control . 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. Presentation Content.

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Presentation Transcript
slide2

PART F1

Paul McAteer

Lisburn Building Control

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

Presentation Content
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 UK’s carbon emission targets and energy policy objectives”Background to the new Part F
drivers behind the amendments to the building regulation part f
Climate change,

Global Warming,

Reduction of Green House Gases, and

Security of Energy Supply

Drivers behind the amendments to the Building Regulation Part F
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.

Global scale
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

European Scale
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.

UK Scale
percentage grouping of eu building stock

26%

Multi Family

Houses

45%

Non-residential

Single Family

Houses

29%

Percentage Grouping of EU building Stock
of co 2 emissions from eu building stock

CO

emissions from the EU building

2

stock as a Percentage

23%

Residental

Buildings

Non-residental

Buildings

77%

% of CO2 emissions from EU building stock
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)

Building Regulation Part F – Common Items
building regulation part f common items1
Building Regulation Part F – Common Items

4 Step Progression towards Whole Building Approach

new terms definitions
Building Work now refers to any change to a buildings’ energy status

Conservatory >30sqm, 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

New Terms & Definitions
new terms definitions1
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

New Terms & Definitions
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 BUILDING’S ENERGY STATUS,

= works to be carried out to Part F, as it relates to the calculation of TER.

Part A Interpretation & General
part a interpretation general1
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

Part A Interpretation & General
part a interpretation general2
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

Part A Interpretation & General
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

DER & TER Resume
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

Common Areas
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) @50Pa used to calculate the DER

Multiple Dwellings
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

Technical Booklet F1 Format & Content
technical booklet f1 format content1
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

Technical Booklet F1 Format & Content
additional guidance
TBF1 Appendix A – H

Extensive use of second tier documents

Reference to many third tier documents

Additional Guidance
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

Key Features for New Dwellings
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

Demonstrating Compliance for Domestic New Build
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%)

Achieving the TER
achieving the ter1
Achieving the TER

Fuel Factors

achieving the ter2
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
minimum acceptable standards
Minimum Acceptable Standards

Criterion 2 Limits to Design Flexibility

minimum acceptable standards1
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
building regulation part f new dwellings1

0.35 (0.70)

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

minimum acceptable standards3
Minimum Acceptable Standards

Design limits for Air Permeability

  • Air permeability maximum of 10 m3/(h.m2) @ 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) @ 50 Pa when calculating the DER, in which case compensating measures will be necessary to achieve the TER
minimum acceptable standards4
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

Insulationof pipes, ducts and hot water cylinder in accordance to Domestic Heating Compliance Guide

Minimum Acceptable Standards
minimum acceptable standards5
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

Minimum Acceptable Standards
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

Limiting the effects of Solar Gains
criterion 4 as built performance
Criterion 4 “As Built Performance”

Quality of Design, Construction and Commissioning

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

Quality of Design,Construction & Commissioning
quality of design construction commissioning1
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

Quality of Design,Construction & Commissioning
quality of design construction commissioning2
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

Quality of Design,Construction & Commissioning
quality of design construction commissioning3
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)

Quality of Design, Construction & Commissioning
quality of design construction commissioning4
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.

Quality of Design,Construction & Commissioning
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)

Operating & Maintenance Instructions
operating and maintenance instructions
Operating and Maintenance Instructions

Example of Energy Rating Notice

tbf1 extended application
Domestic Extensions

Including conservatories > 30m2

Material Changes of Use

When other building types become dwellings

Thermal Elements

Walls,floors and roofs

Controlled Fittings

Windows, rooflights and doors

TBF1 : Extended Application
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

New Terminology
domestic extensions 3 alternative approaches
Standards Based Approach

Calculated Trade-off Approach;

Equivalent Carbon Target Approach

Domestic Extensions: 3 Alternative Approaches
extension to dwellings standards based approach
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.
extension to dwellings
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.

extension to dwellings1
Extension to Dwellings

Provision of thermal elements:

New walls, floors, roofs as part of extension to have

U-value < than Table 3.2 column (a)

or part of individual element U-value < Table 3.4 Column (b)

extension to dwellings2
Extension to Dwellings

Provision of thermal elements:

Replacement walls, floors, roofs as part of extension to have

U-value < column (b) Table 3.2 ,

or part of individual element U-value < column (b) Table 3.4

extension to dwellings3
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
extension to dwellings4
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)

Extension to Dwellings
extension to dwellings5
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 > column (a) table 3.3 the element must be upgraded to values as given in column (b) table 3.3.

15 yearrule

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 >5%, or where additional insulation would

create floor level/ structural/ condensation difficulties.

Extension to Dwellings
extension to dwellings6
Extension to Dwellings

U-values for retained thermal elements

  • – see Table 3.3
extension to dwellings7
Extension to Dwellings

Calculated Trade-off Approach

extension to dwellings8
Extension to Dwellings

Calculated Trade Off

  • Thermal Elements & Controlled Fittings
    • Not to exceed the Area weighted U value
extension to dwellings9
Extension to Dwellings

Calculated Trade-off Approach

Table 3.4 Limiting U-values

extension to dwellings10
Extension to Dwellings

Equivalent Carbon Target Approach

extension to dwellings11
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
conservatories and highly glazed spaces as part of a dwelling
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.
conservatory extension
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)
conservatory extension1
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 temperaturecontrols separate from those on the existing dwelling.
conservatories to dwellings
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)
conservatories to dwellings1
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 temperaturecontrols separate from those on the existing dwelling
conservatories to dwellings2
Conservatories to Dwellings

Highly glazed extensions.

  • Highly glazed extension that is

notthermally separated from the dwelling may be treated as a

conventional extension.

material change of use to dwellings
Two alternative approaches

Standards Based Approach; and

Equivalent Carbon Target Approach

Material Change of Use to Dwellings
material change of use to dwellings1
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 building’s energy status’ must now also be applied.

Therefore TER and DER calculations are required for change of use applications.

Material Change of Use to Dwellings
heating hot water systems
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
fixed internal external lighting
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.

operating maintenance instructions1
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

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

Mechanical Systems
insulation of pipes ducts and hot water storage vessels
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’