Retrofitting Historic Buildings - Westminster City Council

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For further information see:• ‘An Introduction to Low Carbon Domestic Refurbishment’Construction Products Association (2010)http://www.constructionproducts.org.uk/publications/dbfiles/Domestic%20Refurbishment%20Revised11010%20(low%20res).pdf• http://www.energysavingtrust.org.uk/Media/node_1422/Getting-warmer-a-field-trial-of-heat-pumps-PDF46
Solar photovoltaic system (PV electric panels)Does BuildingRegs apply?Yes. Althoughthere is acompetentpersons scheme,ensure installer isqualified to adviseon roof structuralandweatherproofingaspects too orcontact BuildingControl foradvice.Is this work arequirementtriggered byPart L1B?No, it iscoveredunder Part Pas anelectricalinstallation.Permissions and consentsDisruption Risks Unlisted within a conservationareaMedium Medium –Specialistinstallationadvice neededand possibly afeasibility studyor structuralsurvey to ensurethe roofstructure willbear the weightof the panels.Have a supply ofreplacementroof tiles in casethese are brokenduringinstallation.This is permitted development lviii ,even on the roofs of principalelevations of dwellinghouses andflats in conservation areas,subject to it being ‘sited so as tominimise its effect on the externalappearance of the building andthe amenity of the area’, i.e.where there are alternativeoptions for installation, thelocation which minimises thevisual and amenity impacts mustbe selected.Would not be permitteddevelopment:• If it protrudes more than20cm from the roof slope;• If it is higher than the highestpart of the roof (excludingchimney).• In a conservation area, on awall which fronts a highwayListed buildingListed buildingconsent will berequired and thiswill generally beacceptable in adiscreetlocation, wherenot visible fromsurroundingproperties (e.g.internal valleyroof or flat wallbehind aparapet).Unlisted outside aconservation areaThis will not generallyrequire planningpermission as it ispermitteddevelopment lix , on anyroof or wall slope ofdwellinghouses andflats, subject to it being‘sited so as to minimiseits effect on the externalappearance of thebuilding and theamenity of the area’, i.e.where there arealternative options forinstallation, the locationwhich minimises thevisual and amenityimpacts must beselected.Not permitteddevelopment if itprotrudes more than20cm from roof slopeor is higher than thehighest part of the roof(excluding chimney).47
Page 1 and 2: Retrofitting Historic Buildingsfor
Page 3 and 4: ContentsIntroduction 4Limitations o
Page 5 and 6: This guidance will be of most use t
Page 8: Article 4 DirectionsFor some buildi
Page 12 and 13: competent person’ scheme exists.
Page 14 and 15: MeasuresThis section outlines measu
Page 16 and 17: Installing insulation in existing r
Page 18 and 19: Floor insulation (suspended timber
Page 20 and 21: For further information see:• Fac
Page 22 and 23: Solid wall insulation can be a way
Page 24 and 25: For further information see:• Fac
Page 26 and 27: Solid wall insulation can be a way
Page 30 and 31: Advantages: This can improve the th
Page 32 and 33: Disadvantages: It can be more expen
Page 34 and 35: A significant amount of heat is los
Page 36 and 37: Boiler upgradeDoesBuildingRegsapply
Page 38 and 39: Heating controlsDoesBuildingRegs ap
Page 40 and 41: Micro Combined Heat and Power (CHP)
Page 42 and 43: Ground source heat pumpsDoesBuildin
Page 44 and 45: Air source heat pumpsDoesBuildingRe
Page 48 and 49: Solar PV panels convertenergy from
Page 50 and 51: Solar thermal panelsDoes BuildingRe
Page 52 and 53: Living roofDoesBuildingRegsapply?Is
Page 54 and 55: Case Study: 15 Passmore Street, SW1
Page 56 and 57: Case Study: The Flagship HomeArchit
Page 58 and 59: SummaryMeasureUnlisted, within acon
Page 60 and 61: Westminster’s Planning PolicyThis
Page 62 and 63: Notes and References1 Westminster H
Page 64 and 65: 35 Town and Country Planning (Gener

Retrofitting Historic Buildings - Westminster City Council

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