New Dwellings Guidance Booklet For The New Building . - Horsham.gov.uk
Sussex Building ControlNew Dwellings Guidance Booklet for the newBuilding Regulations coming into effect inJune 2022Key insights into Approved Documents:F Ventilation,L Energy efficiency,O Overheating,S Electrical vehicle charging pointsAddress: Sussex Building Control, Parkside, Chart Way, Horsham, West Sussex, RH12 1RLEmail: building.control@horsham.gov.uk Website: www.horsham.gov.uk/building-control Tel. 01403 215151
EmailPhoneWebsiteSachio ShimizuJon HaddockGlyn PostJames RennieAndy WintonAdamHermanowskiBrett PeateOFFICE CONTACTSbuilding.control@horsham.gov.uk01403 215151www.horsham.gov.uk/buildingcontrolEAST TEAM CONTACTSTeam ManagerTel 01403 215649Email sachio.shimizu@horsham.gov.ukSenior BuildingTel 01903 816713Control SurveyorEmail jon.haddock@horsham.gov.ukSenior BuildingTel 01403 215214Control SurveyorEmail glyn.post@horsham.gov.ukBuilding ControlTel 01403 215519SurveyorEmail james.rennie@horsham.gov.ukWEST TEAM CONTACTSTeam ManagerTel 01403 215601Email andy.winton@horsham.gov.ukBuilding ControlTel 01403 215503SurveyorEmail adam.hermanowski@horsham.gov.ukSenior BuildingTel 01403 215635Control SurveyorEmail brett.peate@horsham.gov.ukTo make an application The quickest and easiest way to book an inspection is by downloading the LABC site inspectionapp available for Apple and Android phones. Select Sussex Building Control from the drop-down listof local authorities when booking. Email: building.control@horsham.gov.uk Call us Monday to Friday on 01403 215151 - contact us by 5pm for an inspection the next workingday. If you request an inspection before 10.00am, we'll aim to carry this out on the same day.Address: Sussex Building Control, Parkside, Chart Way, Horsham, West Sussex, RH12 1RLEmail: building.control@horsham.gov.uk Website: www.horsham.gov.uk/building-control Tel. 01403 215151
The new building regulations will come into force for applications made on or after 15June 2022. The new requirements will not apply to applications made prior to June 15 ,providing substantial building work has begun before 15 June 2023 on all aspects of theapplication. This gives 1 year’s grace to allow commencement. (Note: Projects needsubstantial start i.e. foundations dug and poured.)See our handy table for clarification.DatePart L, F ANDO (transitionperiods applyto plot-byplot basis)14/06/2022Applicationsmade on orbefore thisdate will haveuntil the14/06/2023to commenceindividualplots to buildto currentstandards15/06/2022Applicationsdeposited on orafter this date willhave the newregulationsappliedDatePart S (Sitewidetransitionperiods)14/06/2022Applications madebefore or on this datehave 1 year tocommence a single plotso you can build thewhole site without EVpoints15/06/2023Any newdwelling / plotstarted on orafter this datemust build tothe new Part L,F & O regardlessof when theapplication wasmade15/06/2022Applicationsdeposited on or afterthis date must nowprovide EV chargingpoints etc. In line withPart S2025Projected, nextupdate to theRegulationsstandards willincrease againwith similartransitionperiods15/06/2023If work hasn’tcommenced on asingle plot onapplications made onor before 14/06/22then the new Part Smust be followed andprovide EV points toall plots.Please note, you should check if your planning application asks for higher or additionalperformance than any of these requirements.Address: Sussex Building Control, Parkside, Chart Way, Horsham, West Sussex, RH12 1RLEmail: building.control@horsham.gov.uk Website: www.horsham.gov.uk/building-control Tel. 01403 215151
Part L – Conservation of Fuel and power.U-Value Table highlighting changes as of June 2022Thermal ElementCurrent U-ValueNew NotionalDwelling U-Value. (UNew Floors0.22 W/m2K0.13 W/m2KNew ActualThreshold U-Value(Backstop requiringcompensationelsewhere)0.18 W/m2KNew Walls0.28 W/m2K0.18 W/m2K0.26 W/m2KRoof0.16 W/m2k / 0.18W/m2k1.6 W/m2k0.11 W/m2k0.16 W/m2K1.0 W/m2k1.6 W/m2Kvalues used as targets for newdwellings)GlazingFloor 0.13W/m2kWalls 0.18 W/m2KPartial Example of Notional Dwelling:150mm PIR insulation in the floor.100mm Brick - 150mm/ 200mm Cavity width with100mm block. Cavity width thickness dependant onCavity batts, PIR insulation, blown insulation andblocks specified.Roof 0.13 W/m2KHeating systemWastewater heat recoveryAbout 400mm of loft roll in pitch roof ceilings or100mm PIR between rafters and 80-100mmunderneath.Either a gas boiler with solar panels or a low carbonheating system ie. air source / ground source heatpump.All showers connected to WWHR, including showersover baths.Vented by natural and intermittent extract fans.Air permeability 5 m³/(h·m²) at50 PaAll dwellings are now required to be air tested.Ultimately you require an as design Sap before you start works to specify levels ofinsulations required / heating system. It’s easier to comply with heat pumps etc rather thangas boilers and solar panels, but you’ll likely have a worse EPC due to running cost. Youshould also consider planning considerations for any of these systems. Building noticesshould be avoided, because of the level of information required and therefore can only beaccepted if deposited with the full submission information.Address: Sussex Building Control, Parkside, Chart Way, Horsham, West Sussex, RH12 1RLEmail: building.control@horsham.gov.uk Website: www.horsham.gov.uk/building-control Tel. 01403 215151
Continuity of insulation and thermal junctionsNew build dwellings will need to clearly show drawings of all thermal junctions andcontinuity of insulations. This will help reduce heat loss and lower the risk of condensationand mould. This will also link back to the new SAP 10 program. Things to consider:-Floors and foundations: Insulation should be installed tight to the structure, withoutair gaps between insulation panels and at edges-Windows and doors: Should be installed in such a way that the thermal integrity ofthe insulated plane is maintained.-Walls: Insulation should be fitted without any air gaps and tight to the structure,cavity closers, lintels and cavity trays. Mortar snots should be removed to ensure atight fit with the structure and cavities kept clear of all debris. Where fire-stoppingsocks are required, these should fully fill the areas where they are fitted, including atthe heads of cavities.-Roofs: Insulation should be installed tight to the structure, without air gaps, andshould extend to join the wall insulation. For roofs insulated at ceiling level, the longterm protection of the insulation layer should be considered: boarded areas shouldbe provided above the insulation to give access for maintenance.-Rigid insulation boards: Should only be used on flat surfaces. Boards should be fittedto the structure to avoid any gaps between board edges and between the boardfacings. The use of boards with lapped or tongue and groove edges should beconsidered. Any unavoidable gaps between boards should be infilled usingcompressible tape (e.g. for boards within roof rafters) or low expansion foam (e.g.for boards within wall cavities).-Penetrating elements: Steel beams, incoming services, meter boxes and sub-floorvents etc. Designs should clearly indicate means to limit disruption to the insulation.For recessed meter boxes on the cold side of the construction, insulation should beinstalled behind the enclosure. For incoming services, insulation should fit tightlyaround ducts, pipes, etc.These junctions can either be designed and assessed or taken from junction databases suchas Local Authority Building Control Construction details library. This links to BREL reporting& photos of in-built thermal junctions.Address: Sussex Building Control, Parkside, Chart Way, Horsham, West Sussex, RH12 1RLEmail: building.control@horsham.gov.uk Website: www.horsham.gov.uk/building-control Tel. 01403 215151
BREL: Part L & SAP 10Your SAP assessor will provide building control a Building Regulation (England) Part LCompliance Report (BREL) at design stage showing insulation being used, thermal junctioninformation and other details. This will be used to check the thermal build and if substituteproducts are being used.Example:BREL states – 0.15 W/m2k blocks to be used, Example: Thermalite Shield, Top Litestandard, Celcon standardBuilding Control see blocks of different brands that aren’t as efficient on site: Example 0.3W/m2k Forti Crete Ultra-light. Fails needs a recalculation.Example of BREL report.Example first page of a BRELreport. All materials specifiedmust be installed with nosubstitutions allowed unless thereport is recreated by energyassessor.Building control can use this easyto see checklist and may ask yourecalculate thermal elements ifyou swap brands or materialtypes of different thermal values.I.E Dritherm 32 cavity battsspecified but another productseen on site. BREL report willneed to be reissued atcompletion to reflect changes.Address: Sussex Building Control, Parkside, Chart Way, Horsham, West Sussex, RH12 1RLEmail: building.control@horsham.gov.uk Website: www.horsham.gov.uk/building-control Tel. 01403 215151
Photographic evidencePhotographs for each plots thermal junctions MUST be taken. Can be taken by anyonedealing with the project on site, but ideally a responsible person. Note: these photos arerequired for sign off but will not be for building control to do. This will link back to the asbuilt BREL and as Built SAP.Photographs will need to be unique to each property. One photograph per detail should berecorded. Additional images, such as a closeup detail, can be provided only when necessary(see below). Photographs should be taken at appropriate construction stages when eachdetail is completed and always prior to closing-up worksExample BREL photo Would be named Plot 1 P2/BClearly shows cavity wall prior to insulation blown in with minimal mortarsnots and of a structural penetration with cavity closer and insulation in lintelsas per plans.Shows GPS data, time stamp and optional name of who took the photoOptional Map data for ease of identification.Good quality photo/ not blurry or too far awayPhoto can also be used to check against required drawingWe have used afree time stampcamera app;however, youshould confirmwith your SAPassessor suitableof app / cameraneeded.Address: Sussex Building Control, Parkside, Chart Way, Horsham, West Sussex, RH12 1RLEmail: building.control@horsham.gov.uk Website: www.horsham.gov.uk/building-control Tel. 01403 215151
Photos required for each plot1. Foundations/substructure and groundfloor, to show thermal continuity andquality of insulation in the following places.a. At ground floor perimeter edgeinsulation.b. At external door threshold.c. Below damp-proof course on externalwalls.2. External walls: For each main wall type,to show thermal continuity and quality ofinsulation for the following.a. Ground floor to wall junction.b. Structural penetrating elements.NOTE: For blown fill, photos should showclean cavities and clean brick ties with verylimited mortar droppings.a. Joist/rafter level.b. Eaves and gable edges.3. Roof: For each main roof type, to showthermal continuity and quality of insulationat the following.4. Openings: For each opening type (onea. Window positioning in relation to cavityimage per wall or roof type is sufficient), to closer or insulation line.show thermal continuity and quality ofb. External door set positioning in relationinsulation with photographs of theto cavity closer or insulation line.following.5. Airtightness: Additional photographs for all details 1–4 to show airtightness details(only if not included or visible in continuity of insulation image).6. Building services: For all plant associated a. Plant/equipment identification label(s),with space heating, hot water, ventilationincluding make/model and serial number.and low or zero carbon technologyb. Primary pipework continuity ofequipment within or on the building, show insulation.the following.c. Mechanical ventilation ductworkcontinuity of insulation (for duct sectionsoutside the thermal envelope).Photos require Geo-location with a date & time stamp showing when the photos aretaken. They should be of good quality and may require close ups if long shots do notprovide enough details. Photos should be referenced to the numbers above. Apps like“Timestamp camera” could be used.Example:Plot 1 Ground floor to wall junction is named P1/2APlease see appendix B of approved Document L Volume 1, 2021 editionAddress: Sussex Building Control, Parkside, Chart Way, Horsham, West Sussex, RH12 1RLEmail: building.control@horsham.gov.uk Website: www.horsham.gov.uk/building-control Tel. 01403 215151
Part F – Ventilation.Part L 2021 now asks for all dwellings to be air tested and these ventilation requirementshelp reflect these changes.All extractor fans should be tested, and mechanical systems. Appendix C of Part F gives anew commissioning detail.Dwellings can still use natural background ventilation by trickle vents and intermittentextractor fans however dwellings designed lower than 5m³/(h·m2) at 50Pa or the air test isat 3m³/(h·m2) at 50Pa, then a continuous mechanical system is required. If there are cleardiscrepancies between the design and as built tests mechanical systems may also berequired if not already in place or expert advice will be required.Trickle vents must now be between 8000mm2 - 10,000mm2 equivalent area per habitablespace. (The little no. stamped on the trickle vents will tell you how much EA they give you)Open plan kitchen area’s need at least 3 trickle vents. In simple terms most dwelling’s tricklevents will now need double the existing amount or be double in size. You’ll need at least 4or 5 ventilators per dwelling and dwellings opposite noisy sites like main roads need noiseattenuating background ventilation.Part F simplifies ventilation, now only considering what used to be system 1 ,3 and 4 in thecurrent edition, ignoring passive stack ventilation options. There is also greaterconsideration to mechanical systems considering issues like pollutants.It should be noted that using mechanical heat recovery ventilation systems potentiallymeans your designer could offset fabric standards in the SAP assessment and depending onthe mechanical ventilation system used you may still require a lower standard of tricklevents.Address: Sussex Building Control, Parkside, Chart Way, Horsham, West Sussex, RH12 1RLEmail: building.control@horsham.gov.uk Website: www.horsham.gov.uk/building-control Tel. 01403 215151
Part O – OverheatingAchieving more airtight and efficient dwellings creates a chance of overheating. This newApproved Document only applies to newly built residential buildings where people sleepovernight, which includes new houses, flats, student accommodation, care homes andsimilar living accommodation. It does not apply to residential buildings formed by change ofuse or hotels, hospitals etc.Developments within Horsham District and Crawley Borough are classed as moderateoverheating risk, similar to most of the UK except some large cities.There are two methods for compliance with Part O.‘Simplified method’CIBSE’s TM59 thermal modellingApproved document O gives restrictions forglazing percentage on each side of the buildingdepending on orientation. This helps limit solargains and sets minimum free areas forwindows to be opened to remove heat from abuilding.Although classed as simplified it is hard toreach compliance. Single façade flats,dwellings adjacent to noise and pollutants orcurrent design standards will likely see mostfail this route. The Department for LevellingUp, Housing and Communities explained on awebinar this was intentional to limit designstandards as research showed all new homesoverheated.A more flexible and likely to be thepreferred methodWill consider the risk based on location,material, orientation, occupancy etc todetermine how and if a building willoverheat.It’s worth noting internal blinds andcurtains and external trees cannot beconsidered for shading to avoidoverheating.Where neither of these methods canshow compliance only then can you usemechanical coolingDesigners will have to complete achecklist showing what method theyhave used, also both the builder andbuilding control will have to sign thechecklist to prove the design has beenmet. Building control will also use thisto determine if the design is followedon site.Can be found in appendix B ofApproved Document O.Address: Sussex Building Control, Parkside, Chart Way, Horsham, West Sussex, RH12 1RLEmail: building.control@horsham.gov.uk Website: www.horsham.gov.uk/building-control Tel. 01403 215151
Part S – Electrical vehicle charging points.The Building Regulations will now consider Electrical Vehicle (EV) Charging Points.1.Every new dwelling with associated parking requires an EV charging point.2.Dwellings formed by change of use with associated parking will require an EVpoint. (Percentages apply to large conversion projects)3.Residential buildings like flats that undergo a “major renovation” will have to haveits parking spaces assessed and may require EV points and or EV cabling in place.4.New Non-residential buildings will need 20% of the spaces to have cabling forcharging points and a minimum of one charging point in place if there are at least 10 carparking spaces.5.Non-residential buildings undergoing major renovation may require the sameprovisions as new non-residential buildings.Electrical charging spaces are given acceptable locations in Approved Document S, howeverinterference with Approved Document M access should be noted.The EV points are likely to be commissioned under competent work schemes such as Part Pregistered electricians, IET wiring regulations etc. Therefore, Building Control will unlikely becommissioning EV points and just ensuring they are in place as part of a Building RegulationApplication.The building regulations do not consider charging points of non-associated parking. Soparking spaces that aren’t associated with dwellings, like on street parking, are not part ofour requirements but other law, such as planning that may stipulate higher requirementsthan the Building Regulations. It’s also expected that charge points will be a minimum of7kW power to prevent the use of 13A plug sockets.For this requirement to be waived based on cost, two formal quotes to be provided toBuilding Control at the plans stage showing they exceed the cost cap given in Part S. This isnormally where the average connecting cost per charging point exceeds 3600. This is mostlikely in remote locations where dwellings and non-residential buildings require electricalinfrastructure that would be high cost to upgrade.Address: Sussex Building Control, Parkside, Chart Way, Horsham, West Sussex, RH12 1RLEmail: building.control@horsham.gov.uk Website: www.horsham.gov.uk/building-control Tel. 01403 215151
Home User Guide/Providing information to homeownersWhat information do I need to provide?Developers & home builders need toprovide information to homeownersregarding the thermal performance of thebuilding, how to use ventilation systems,dealing with overheating and domesticheating systems.It is recommended to use the newgovernment standard template; however,you could choose to create your owntemplates or use manufacturesinformation.This will provide homeowners with crucialinformation and help them understand theprovisions the new regulations asked for intheir new homes.Home user guide template and ventilationguide - GOV.UK (www.gov.uk)*Disclaimer* Sussex Building Control has no affiliations with manufacturers’ and remainscompletely impartial. We take no accountability for use of this booklet as this is meant asguidance. Ultimately the approved documents and design standards should be sought forinformation on the building regulations. This is meant as guidance only and competentdesigners and contractors should be consulted on your project.Copy right of East Suffolk CouncilCredits: Alex Deakin BSc MCABE MCIOB C build E.Jamie Hazell ACABE,Michael Charlton BSc FCABE MIFire, ICIOBColin Dolden C.Build E MCABEEmily Bowman BSC (Hons) C. Build. E MCABE MCIOB
Email james.rennie@horsham.gov.uk WEST TEAM CONTACTS Andy Winton Team Manager Tel 01403 215601 Email andy.winton@horsham.gov.uk Adam Hermanowski Building Control Surveyor Tel 01403 215503 Email adam.hermanowski@horsham.gov.uk Brett Peate TelSenior Building Control Surveyor 01403 215635 Email brett.peate@horsham.gov.uk To make an application
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