Building Standards & Regulations

Transcription

1 Building Standards & Regulations Sarah Neary, BE MBA CEng Senior Adviser Building Standards Section

2 Building Standards Section Who we are? What we do? Content of Presentation 1. Objectives/strategies 2. Building Regulations 3. Energy Efficiency (i) (ii) Part L Part F (iii) EPBD (iv) Carbon Neutral (v) Code of Practice for Retrofitting

3 High Level Objective of DEHLG To ensure that our regions and communities are planned and built in a manner that respects sustainable economic and balanced regional development, in compliance with strong and evolving planning and building codes. Key Strategy for Building Standards Section To promote high quality, safe and sustainable design and construction, ti notably, through h ongoing review of the Building Regulations and prioritisation of energy efficiency and ecodesign.

4 Building Regulations contain legal performance requirements for buildings are divided into 12 Parts (A-M) each covering a certain subject eg A Structure, B Fire Safety, C Site Preparation & Resistance to Moisture etc are accompanied by Technical Guidance Documents (TGD)(A-M) which contain guidance that if followed is considered prima facie evidence of compliance with the Regulations allow the adoption of alternative approaches provided allow the adoption of alternative approaches, provided that the approach meets the requirements of the Building Regulations. Building Control Authority may require evidence that demonstrates this.

5 Building Regulations Part A Part B PART Structure Fire Safety TITLE Part C Part D Part E Part F Part G Part H Part J Part K Part L Part L Part M Site Preparation and Resistance to Moisture Materials and Workmanship Sound Ventilation Hygiene Drainage and Waste Water Disposal Heat Producing Appliances Stairways Ladders Ramps and Guards Conservation of Fuel and Energy - Dwellings Conservation of Fuel and Energy Building other than Dwellings Access for People with Disabilities

6 Application of Building Regulations New buildings Existing buildings: No works carried out to a building should cause a new or greater contravention in the building of any provision of the Regulations Extensions Material alterations an alteration, where the work or part of the work carried out by itself would be the subject of a requirement of Part A (Structure) or Part B (Fire) Repair or Renewal likely to effect the structural integrity Replacing doors windows and rooflights Part L B Replacing doors, windows and rooflights Part L, B apply

7 Application of Building Regulations Changes of use Certain Parts apply (A,B,C4,F,G,H,J,L) changed to a dwelling, multi dwelling, day care, hotel, hostel, industrial, institutional building, office, place of assembly, shop, shopping centre Services, fittings, i equipment works in connection with the provision in relation to a building which Part G,H or J impose requirements Exemptions Responsibility for compliance

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9 Review Process for Building Regulations Develop draft in consultation with Building Regulations Advisory Body (BRAB) Public consultation ti 3 months Assess submissions Publish definitive text Transition Period for operation

10 Review of Building Regulations 2010 PART 2010 Part A Structure 2006 Part B Fire Safety TITLE 2004 Part C Site Preparation and Resistance to Moisture 2000 Part D Materials and Workmanship 2010 Part E Sound 2009 Part F Ventilation 2008 Part G Hygiene 2010 Part H Drainage and Waste Water Disposal 1997 Part J Heat Producing Appliances 1997 Part K Stairways a Ladders Ramps and Guards 2010 Part L Conservation of Fuel and Energy - Dwellings 2010 Part L Conservation of Fuel and Energy Building other than Dwellings 2010 Part M Access for People with Disabilities

11 Recent and upcoming Reviews of Building Regulations relating to Energy Efficiency

12 Focus on energy efficiency Part L 2008: Conservation of Fuel & Energy Part F 2009: Ventilation

13 History of Part L 1991 Part L All Building - including dwellings 1997 Part L - Heat Energy Rating 2002 Part L - Dwellings Improved performance 2005 Part L - Dwelllings - DEAP - Buildings Other than dwellings Improved Performance 2007 Part L - Dwellings - 40% improvement 2008 Part L - Building Other than dwellings - NEAP - Consolidated Regulation

14 Part L 2008 Dwellings Current Situationti Timeline Part L % Improvement Baseline 40% Energy (Avg Dwelling) kwh/m2/annum CO2 (Avg Dwelling) kg/m2/annum EPBD BER(Avg Dwelling) B3 B1

15 Principle underpinning Part L Reduce Demand for Energy Increase supply from renewable and efficient sources

16 The main provisions of the Regulations for new dwellings a) Primary energy consumption and associated CO2 emissions b) Renewable energy sources c) Building fabric d) Space and water heating e) Boiler efficiency f) Owner information

17 The main provisions of the Regulations for new dwellings? 1 a) Primary energy consumption and associated CO2 emissions b) Renewable energy sources c) Building fabric d) Space and water heating e) Boiler efficiency 5 f) Owner information

18 1)Energy consumption and CO 2 emissions Performance criteria is set as a % reduction of primary energy consumption & CO 2 emissions i of the proposed dwelling relative to a reference dwelling Reference dwelling is similar to the proposed dwelling in form but complies with Part L The reference dwelling has gas fired space and water heating DEAP calculates both the PE & CO2 emissions Energy Performance Coefficient EPC Carbon Performance Coefficient CPC Maximum permitted EPC and CPC is set to ensure 40% saving in both for each dwelling

19 2)Use of renewable energy sources 10 kwh/m 2 /annum thermal energy eg solar water heating OR 4 kwh/m 2 /annum electrical energy eg PV Panels OR A combination Alternatively Combined Heat and Power Supporting database on renewable products (solar, heatpumps, biomass) by SEI

20 3) Building Fabric a) Fabric insulation b) Thermal bridging c) Air infiltration

21 Aver a ge U- v alu e2.01 a) Building Fabric Fabric insulation Area weighted average elemental u-values Area weighted average elemental u-value of doors, windows, rooflights reduced to 2.0 (opening area 25% of floor area) Unheated Attic 0.22 Average 0.27 U-value Unheated space

22 b) Thermal Bridging This occurs where an insulation layer is broken by a non-insulant material giving the potential for high heat loss at that point mould growth, condensation, heat loss DEAP calculates TB based on a multiplier of total surface area 1. Demonstrate by calculation that the all thermal bridges meet a table of acceptable values in TGD L, Table D1 2. Use acceptable details that have been assessed and limit thermal bridges to acceptable values as per Table D1 in TGD L 3. Use alternative details that limit risk of mould growth and condensation using a calculation method for the temperature factor in TGD L APPROPRIATE ON SITE INSPECTION & QUALITY CONTROL Value of Y = 0.8 Alternatively, el Value of Y = 0.15

23 Acceptable Construction Details Section 1 - Introduction - general theory Section 2-7 separate parts, indicative detail drawings of typical thermal bridges: Type 1 Cavity wall insulation Type 2 External insulation Type 3 Internal insulation Type 4 Timber Frame Type 5 Steel Frame Type 6 Hollow Block Internal Insulation Type G General Details (common to all constructions)

24 Acceptable Construction Details

25 c) Air Permeability Air Permeability/Tightness: Air permeability is the measure of air floe through the fabric of the building Design approach Primary air barrier Acceptable details Inspection regime Limiting air infiltration 10m 3 /(hr.m 2 50 pascals Pressure testing typically 5% greater for schemes < 40; special provisions for schemes less than 3

26 4) Building Services Boiler efficiency: Oil or gas fired boilers should have a seasonal efficiency should be not less than 86% as specified in HARP Condensing d i boiler Replacement boilers where practicable - an assessment document for existing dwellings Guide to the Condensing Boiler Installment Assessment e Procedure e for Existing Dwelling

27 4) Building Services contd. Building Services Controls: controlling, as appropriate the demand for and output of space heating and hot water services provided [ broadly 2005 Part L for oil and gas] Support document covering range of systems and fuels Heating and Domestic Hot Water Systems for Dwellings- Achieving Compliance with Part L 2008

28 4) Building Services contd. Insulation of pipes, pp ducts and vessels: limiting the heat loss from pipes, ducts and vessels used for the transport or storage of heated water or air, broadly as existing TGD but pipes/ducts within fabric to be insulated

29 4) Building Services contd. Mechanical Ventilation Systems: Performance levels in GPG 268 Specific Fan Power and Heat recovery efficiency specified Air permeability should be significantly better

30 5) User information Operation and maintenance of the: Building Fixed d Services

31 Compliance of completed dwelling The completed building must comply Checks and inspections on fabric insulation air permeability thermal bridging Heating g systems should be commissioned to facilitate efficient operation.

32 Part L - What s next? What s next? Timeline Part L % Improvement Baseline 40% 60% Energy (Avg Dwelling) kwh/m2/annum CO2 (Avg Dwelling) kg/m2/annum EPBD BER(Avg Dwelling) B3 B1 A3

33 Areas under consideration for Part L 2010 a) Primary energy consumption and associated CO2 emissions 60% b) Renewable energy sources c) Building fabric Lowering u values element, windows, doors etc Lowering air permeability d) Space and water heating & Boiler efficiency Greater efficiency e) Owner information

34 Part L - What s next? What s next? Timeline Future Part L % Improvement Baseline 40% 60% Carbon Neutral Energy (Avg Dwelling) Energy (Avg Dwelling) kwh/m2/annum CO2 (Avg Dwelling) kg/m2/annum EPBD BER(Avg Dwelling) B3 B1 A3 DOEHLG Towards Carbon Neutral A2+

35 Carbon Neutral Towards Carbon Neutral 2013: Draft Framework strategy for achieving Carbon Neutral Standard for Dwellings began in Public consultation in 2010.

36 Part L: Buildings other than Dwellings BRAB WG scoped the project in Continuing work to establish a ambitious but realistic % reduction on current standards

37 Part F Ventilation

38 Part F 2009: Ventilation Amended to provide for higher standards of ventilation & to support related provisions i of Part L. S.I. 556 signed in December 2009 TGD F now

39 Part F Ventilation o o o o Purpose of Ventilation: Limiting moisture content within buildings condensation/ mould growth Limiting harmful pollutants indoor air quality Dwellings: Natural Ventilation Mechanical Ventilation with Heat recovery Natural Ventilation: Background/general g Purge Extract MVHR o Minimum capacity based on design occupancy or floor area - taking account of air infiltration o Extract rate and boost rate for wetrooms o Boost capacity may be required to meet extract requirements o Purge ventilation provision

40 Key areas: Mechanical Ventilation & Heat Recovery Ref BRE Digest 398 Continuous Mechanical ventilation in dwellings design, installation and operation Installation and commissioning of ventilation systems for dwellings achieving compliance with Part F - in progress Controls to indicate that the system is operating correctly Good installation practice Fire safety ref. BRE Digest 398 Performance requirement - leakage class - Class 2 (EN ) [energy efficiency req. specified in TGD L] Combustion appliances Airflow measurements should be checked that they meet design User Information Operation controls how it works Maintenance locations filters how to clean/replace

41 Energy Performance of Buildings Directive

42 Energy Performance of Buildings Directive (EPBD) 2009 first full year of mainstream operation of BER scheme. BER now required for All dwellings commissioned or offered for sale or rent Non-domestic buildings commissioned, or offered for sale or rent, (except a new building which had applied for planning prior on or before 30 Jun 2008 and been substantially complete by 30 June 2010.) Display Energy Certificates (DEC) required for buildings over 1000m2 occupied by public body. 105,000 BERs for dwellings now in place (5.5% of Housing Stock)

43 BER Profile for Existing Dwellings 14% 12% 10.92% 12.10% % % 10% 8% 6.59% % 8.38% 6.92% 6.94% % 6% 4% 2% 0% 0.00% 0.01% 0.05% 0.61% 2.77% A1 A2 A3 B1 B2 B3 C1 C2 C3 D1 D2 E1 E2 F G 85,620 BERs issued for existing dwellings (1 Jan Mar 2010)

44 Recast EPBD Recently agreed by EU; Will enter into force c. June Most requirements already in place under existing BER / Part L arrangements. Additional requirements include Energy Efficiency Standards in building code for new and renovated buildings to be set at cost optimal levels BER certificate ratings to be quoted in property adverts DEC requirement will broaden to include public buildings over 500m2 and some frequently visited commercial buildings (Retail, Banks, etc.) Member states to develop plans for increasing stock of low carbon / low energy buildings Public authorities to act as exemplars by promoting energy performance of buildings

45 Code of Practice Energy Retrofitting Drivers Concept Building Fabric eg wall, floors, roofs, windows doors, airtightness Building Services Eg heat source, distribution network, control systems Lighting

46 Code of Practice Energy Retrofitting Installation procedures Essential associated work Heat flow issues Moisture flow issues Air flow issues Fire safety issues Building Regulations

47 CoP - Timeframe Working Group established Feb 2010 Scope & terms of reference under discussion RFT for consultants in Q Draft for public consultation by end 2010

48 Thank you for your attention

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