Refurbishment Solutions - Kingspan Insulation - Kingspan Group PLC

Refurbishment SolutionsThe Road to Improving your Building Energy Rating (BER)

ContentsBuilding regulations 02Energy costs 04Explanation of terms used 05Summary chart 06External rendered insulation system 08Internal dry-lining 10Solid ground floor 12Cold pitched roof 14Warm pitched roof 16Flat ceiling 18Closing cavities 20Please note that this document is produced as a guideline only to the requirements of the proposed building regulations and isdesigned purely to illustrate the potential performance levels achievable with Kingspan Insulation products. The actual Building EnergyRating will vary depending on additional specific details such as floor area, dimensions and extent of glazing etc and the guidance istherefore limited in this regard. An independent accredited Energy Assessor should be employed to carry out a detailed DEAPcalculation to ensure an accurate specification for each dwelling. Accordingly, Kingspan Insulation Ltd accepts no liability for anyerrors, omissions or claims arising from the use of this document.

Building regulationsBuilding regulationsThe SituationThere is a significant stock of existing buildings in Ireland thatare poorly insulated, have poor quality windows and inefficientheating systems – it is pertinent that these houses areimproved if we as a nation are to reduce our CO 2emissionsand reduce our reliance on imported energy sources.The new building regulations aim to further increaseawareness of energy efficiency in buildings and apply this toexisting dwellings.On an individual level, ever increasing energy prices in termsof electricity, gas and oil will mean that these homes willbecome increasingly expensive to live in. While the newregulations do not stipulate that you have to improve theperformance of your home (in fact they will not affect you at allunless you are renting or selling) from a practical point of viewimproving the efficiency of your home will reap rewards in thelong term in terms of energy savings.The GoalThe new Building Regulations will require:• A Building Energy Rating (BER) certificate for every dwellingwhen rented, sold or leased.• This certificate will be valid for a period of 10 years providedthat no amendments to the dwelling have been carried out inthe meantime.• Each certificate must be accompanied by additionalinformation which will suggest some cost-effectiveimprovements for guidance only in order to improve theEnergy Rating of the dwelling.The MethodUsing a similar assessment method as for new dwellings,each dwelling will be assessed by an Energy Assessoraccredited by SEI (Sustainable Energy Ireland) using anupdated DEAP calculation method. This will label buildingsfrom being inefficient (G Rating) right up to very efficient (A1Rating). The BER (Building Energy Rating) label will clearlyindicate the amount of energy used in kWh (kilo-watt hours)per square metre of floor area per year, though this will onlybe indicative as the calculation method makes certainassumptions on heating cycles and occupancy. Although mostexisting buildings will rate closer to ‘G’, even relatively smallimprovements can significantly improve the energy rating to atleast a ‘C’.The AssessmentAn SEI accredited assessor should be employed in order tocarry out a survey of the existing building and compile allrelevant information such as building dimensions, existingheating system, insulation levels and glazing details in orderto determine the existing Building Energy Rating. Thiscertificate will be provided to the homeowner along with ashort list of recommendations to improve the performance ofthe building. This may include increased insulation levels,replacement of boiler, replacement of windows etc. As this isfor guidance only there is no onus on the home owner tomake these improvements other than the knowledge that theywill significantly reduce both the cost of running their homeand carbon dioxide emissions.The DatesBERs for existing dwellings will be required for all dwellingswhen rented, sold or leased from January 2009. BERs will berequired for all existing dwellings regardless of age.The RecommendationsExisting dwellings will generally have poorly insulated walls,floors and roofs, poor performance windows, high levels of airleakage and inefficient heating systems all resulting indwellings that are very expensive to heat. The followingrecommendations should be considered to upgradeyour home:Increase Insulation Levels:• The first step is to minimise heat lost through the buildingfabric. The easiest element to upgrade is the attic space as itis usually easily accessible. Consider a high performancerigid foam insulation such as Kooltherm K7 so as to ensurelow fire risk and maximum thermal performance withminimum thickness of product.• The next step is to consider the largest element area(therefore greatest total heat loss) which is usually the wallsof the dwelling. Where it is possible to upgrade this elementan externally insulated render system utilising KingspanKooltherm K5 EWB board is an excellent method ofsignificantly reducing heat loss with minimal disruption to theexisting dwelling. An alternative is to use an internallyinsulated dry-lining board, though floor space will restrict themaximum thickness of the insulation and the procedure canbe quite disruptive.• Lastly the floor could be upgraded but this will generallyprove to be the most disruptive unless there is anexisting suspended timber floor. In the case of a solidconcrete floor it may be more realistic to just provideperimeter insulation at the junction between the concretefloor and the existing external walls as most heat loss occursat this location.Replace Windows:Windows represent a significant path for heat loss especiallyif single glazed.• Replacement windows should be at least double glazed andhave a U-Value of 2.00W/m 2 K (area weighted average forglass and frame).• Ensure that replacement windows are adequately sealedagainst the jambs and that there is no air leakage.Replace Heating System:• When the building fabric is upgraded it would be advisableto replace the existing heating system with a more energyefficient system.• The new heating system should have an efficiency of at least86% but ideally closer to 90%.Other Improvements:• Solar hot water panels should be considered as part of theremedial works so as to minimise energy requirementsduring summer months.• Consider replacing and draught stripping all external doors.• Consider replacing standard light bulbs with more efficientand environmentally friendly Compact Fluorescent Bulbs.Building regulationsTimescale for residential energy performance complianceJAN2003JAN2007JUL2008JAN20092010 2015Upgrade U-Values(Typically C1 Rating)New DEAP Calculation Methodapplies to all new homes whichplanning permission is applied for40% Improvement in EnergyPerformance (Typically B1 rating)BER certificate required for existingbuildings (when rented/sold)Further 20% improvement inEnergy Performance(Typically A3 Rating)Zero Carbon?02 Kingspan Refurbishment SolutionsKingspan Refurbishment Solutions 03

Energy CostsExplanation of terms usedThe chart below demonstrates how significantly energy costsvary between energy ratings. These costs have been derivedfrom the average results of calculations of a 150m 2 typicalIrish 1970’s bungalow.BEREnergy cost per m 2(Approx)Energy cost saving %(Approx compared to C1)CO 2emissions(Kg/m 2 /yr)Breathable membrane - is an advanced roofingmembrane usually placed over the roof timber structure toprovide a waterproofing layer. It has the additionalproperties of being ‘breathable’ or ‘vapour permeable’.Closed cell - rigid phenolic and polyisocyanurate insulationare closed cell products. This means they can resist bothwater and moisture ingress and can defy air movement, sowill not sag or slump. This ensures they continue to performover the lifetime of the building, a feature open cell materialscan not achieve.Thermal mass - is the ability of a material to store heat.The amount stored depends primarily on the elements massie: concrete or blockwork would have a higher thermal massthan timber. If designed correctly thermal mass can be ameans of storing passive solar heat gain which is thenreleased as the building cools down.U-Value - is the rate of heat loss through a constructionelement per metre squared per degree of temperaturedifference. Therefore the lower the U-Value the lower theheat lost.Energy CostsABCDEFG€ 3.50€ 6.00€ 9.00€ 12.00€ 16.00€ 19.50€ 22.50The summary chart on pages 6 and 7 gives some guidanceon typical specifications to achieve these ratings. Pleasenote they are indicative only and are not designed as asubstitute for an individual assessment by an SEI assessor.The subsequent details go through the various buildingelements such as walls, floors, and roofs and providean outline specification for each. As characteristicsof a home will vary, so too will the requirements andconsideration needs to be given to your individual needs.Kingspan Insulation have a dedicated technical team thatcan offer you further advice, so why wait to reduce yourenergy bills, call today+353 (0) 42 975 4297 or emailtechline@insulation.kingspan.com84%73%60%47%29%13%N/A1228406080100115Damp proof membrane - is a layer of reinforced heavygauge polythene used to prevent rising dampness in solidground bearing floor construction.Proprietary insulated vertical DPC cavity closers- is essentially a strip of insulation with a factory bondedrigid DPC (Damp Proof Course) eg: Kingspan Thermabate.Used for window door jams.Radon barrier - is similar to a Damp Proof Membrane buthas the additional benefit of preventing the penetration ofradon gas into the building. Radon is a naturally occurringradioactive gas which when present and concentrated underan unprotected floor slab can potentially cause adversehealth conditions.Acceptable detail - a drawing detail that promotes bestbuilding practice typically for junction details such asfloor/wall and wall/roof junctions ensuring maximum airtightness and continuity of insulation.Sarking felt - a standard roofing felt which is usuallyplaced over the roof timber structure to provide awaterproofing layer.Thermal bridging - is where a material or part of abuilding element has a higher thermal conductivity than theadjacent materials. Its ability to transmit more heat creates arelatively colder surface on which warm moist air willcondense. This condensation can potentially cause mouldgrowth and eventual fabric decay.Vapour control layer - primarily used to minimisemoisture migration through an external building elementthereby reducing the risk of condensation occurring withinthe structure (interstitial condensation). It can also aid theairtightness of the building fabric if properly installed andsealed at junctions.BER ChartBuilding Energy RatingkWh/m 2 /yrMost Efficient≤25>25>50>75>100>125>150>175>200>225>260>300>340>380>450Least EfficientA1A2A3B1B2B3C1C2C3D1D2E1E2FGCarbon Dioxide (CO 2)Emissions IndicatorkgCO 2/m 2 /yrBEST0WORST> 120The Less (CO 2) produced, theless the dwelling contributes toglobal warmingExplanation of terms used04 Kingspan Refurbishment SolutionsKingspan Refurbishment Solutions 05

Summary chart0-75 kWh/m 2 /yrA76-150 kWh/m 2 /yrB151-225 kWh/m 2 /yrC226-300 kWh/m 2 /yrD301–380 kWh/m 2 /yrE381-450 kWh/m 2 /yrF>450kWh/m 2 /yrGExternal Rendered Insulation System(assuming 25mm EPS internally)U-Value (W/m 2 K)Insulation0.12150mm Kooltherm K5 EWB0.16110mm Kooltherm K5 EWB0.2760mm Kooltherm K5 EWB0.3050mm Kooltherm K5 EWB0.3640mm Kooltherm K5 EWB0.4330mm Kooltherm K5 EWB1.0025mm EPS between battensInternal Dry-liningU-Value (W/m 2 K)Insulation0.12100mm Kooltherm K12 betweenstuds & 92.5mm Kooltherm K18fixed to inside of studs0.1670mm Kooltherm K12 betweenstuds & 82.5mm Kooltherm K18fixed to inside of studs0.2782.5mm Kooltherm K17 or72.5mm Kooltherm K180.3072.5mm Kooltherm K17 or62.5mm Kooltherm K180.3462.5mm Kooltherm K17 or52.5mm Kooltherm K180.4352.5mm Kooltherm K17 or42.5mm Kooltherm K181.0025mm EPS between battensSolid Ground FloorsU-Value (W/m 2 K)Insulation0.12140mm Kooltherm K30.16100mm Kooltherm K30.2560mm Kooltherm K30.70none0.70none0.70none0.70noneSummary chartCold Pitched RoofU-Value (W/m 2 K)Insulation between raftersUnder raftersWarm Pitched RoofU-Value (W/m 2 K)Insulation between raftersOver rafters0.12150mm Kooltherm K772.5mm Kooltherm K17 or K180.12120mm Kooltherm K780mm Kooltherm K70.14150mm Kooltherm K752.5mm Kooltherm K17 or K180.1480mm Kooltherm K780mm Kooltherm K70.16100mm Kooltherm K762.5mm Kooltherm K17 or K180.1670mm Kooltherm K770mm Kooltherm K70.20100mm Kooltherm K742.5mm Kooltherm K17 or K180.2060mm Kooltherm K750mm Kooltherm K70.30100mm Kooltherm K70.2740mm Kooltherm K740mm Kooltherm K70.4560mm Kooltherm K70.4540mm Kooltherm K70.87100mm Mineral Fibre0.87n/aSummary chartFlat CeilingsU-Value (W/m 2 K)Insulation between joistsUnder joists0.12200mm Kooltherm K742.5mm Kooltherm K17 or K180.14160mm Kooltherm K742.5mm Kooltherm K17 or K180.16200mm Kooltherm K70.20140mm Kooltherm K70.27100mm Kooltherm K70.4550mm Kooltherm K70.87100mm Mineral FibreAdditional SpecificationHeating (Oil) (efficiency %)Electrical (Lighting)Electrical (Photovoltaic)Water HeatingGlazing/Door U-Value9050% CFL5m 24m 2 Solar Panels1.109050% CFLNo4m 2 Solar Panels1.509025% CFLNoBy Main Heating System2.1080StandardNoBy Main Heating System2.1080StandardNoBy Main Heating System2.1060StandardNoBy Main Heating System5.0060StandardNoBy Main Heating System5.00Notes:1. Assuming K17 is dabbed or fixed directly to wall and K18 is fixed to timber battens or a steel framing system.CFL Compact Fluorescent Lighting Photovoltaic Solar Panels for providing Electricity EPS Expanded PolystyreneNB: These details and specifications have been prepared in support of providing an indication of the requirements to meet the various Energy Ratings. As the rating achievedwill vary depending on the shape and size of the dwelling along with other specification options not covered above, they are indicative only and must not be taken as a finalspecification. A registered BER Assessor should be employed to carry out the necessary calculations to determine the exact requirements for each individual dwelling.Accordingly Kingspan Insulation Ltd accepts no liability for errors, omissions or claims arising from the use of this information.06 Kingspan Refurbishment SolutionsKingspan Refurbishment Solutions 07

External rendered insulation systemKingspan Kooltherm ® K5 EWBExternal Rendered SystemThis is an ideal system to upgrade the thermal performanceof an existing building as all the work is carried outexternally. Low U-Values are very easily achieved, evenexceeding current building regulations for new build!The roof eaves can be adjusted slightly to take into accountthe additional depth of insulation and proprietary aluminiumcill extentions can be used to dress over the existingconcrete cill.Existing external wallBedding mortarExternal rendered insulation systemBecause insulated render systems are proprietary and utilisedifferent mechanisms for attaching insulation to the wallstructure, sitework guidance should be sought from thesystem manufacturers. However, in the absence of any otherguidance Kingspan Kooltherm K5 EWB insulation boards aremechanically fixed to the exterior of masonry external wallsusing proprietary fixings at a rate of 5No. per board. Atleast one fixing should be fire rated (ie: steel). The KoolthermK5 EWB insulation should not continue below the dampproof course, Kingspan Styrozone should be used instead.This system means the building is effectively wrapped inhigh performance insulation which maintains the structureat room temperature thereby eliminating cold bridgeissues. In addition maximum thermal mass is maintainedinside the insulation which will ensure a more even heatingregime and allow storage of passive solar heat gain.External rendered insulation systems utilize polymermodified renders and the use of standard sand/cementrenders are discouraged due to the inflexible nature ofthe render.DoEnsure minimum 20mm KingspanKooltherm K5 EWB insulation isreturned at windows & door jambs.Don’tUse standard sand/cement renderover external insulation system.EML or glassfibre meshMechanical fixingsPolymer modified renderExternal rendered insulation systemExternal RenderedInsulation SystemABCDEFGU-Value (W/m 2 K)0.120.160.270.300.360.431.00Insulation150mm Kooltherm K5 EWB110mm Kooltherm K5 EWB60mm Kooltherm K5 EWB50mm Kooltherm K5 EWB40mm Kooltherm K5 EWB30mm Kooltherm K5 EWB25mm EPS between battens08 Kingspan Refurbishment SolutionsKingspan Refurbishment Solutions 09

Internal dry-liningKingspan Kooltherm ® K17 or K18Insulated Dry-lining BoardTraditionally internal dry-lining has been the preferred methodof improving the thermal performance of existing walls. Usingpremium performance Kingspan Kooltherm K17 or K18products will ensure the thinnest and most effective solutionand will considerably reduce heat loss.Existing external wallCare must be taken as with any insulation upgrades that theinsulation is as continuous as possible to minimise localisedthermal bridging. This can be achieved by providing a thinlayer of K17 or K18 to the window and door reveals and alsoreturning this insulation for a minimum of 1m where internalblock walls join the external wall.Existing timber floorInternal dry-liningKingspan Kooltherm K17 is designed for use where it will bedabbed or bonded to the face of the existing wall. This mustbe supplemented with a minimum of 3No. mechanicalfasteners (1No. in centre and one in each top corner ofboards). Kooltherm K17 can also be fixed directly to thesubstrate with mechanical fixings as per the Kooltherm K17detail brochure, whereas Kooltherm K18 is designed for usewhere it will be mechanically fixed onto timber battens or asteel framing system.DoMinimise service penetrations.Ensure minimum 25mm insulationis returned at window & door jambs.Don’tPlace a separate vapour controllayer between the insulation andexisting wall.Existing floor joistsKingspan Kooltherm ® K8Cavity BoardInternal dry-liningExisting plasterboard ceilingInternal Dry-LiningABCDEFGU-Value (W/m 2 K)0.120.160.270.300.340.431.00Insulation100mm Kooltherm K12 betweenstuds & 92.5mm Kooltherm K18fixed to inside of studs70mm Kooltherm K12 betweenstuds & 82.5mm Kooltherm K18fixed to inside of studs82.5mm Kooltherm K17 or72.5mm Kooltherm K1872.5mm Kooltherm K17 or62.5mm Kooltherm K1862.5mm Kooltherm K17 or52.5mm Kooltherm K1852.5mm Kooltherm K17 or42.5mm Kooltherm K1825mm EPS between battens10 Kingspan Refurbishment SolutionsKingspan Refurbishment Solutions 11

Solid ground floorKingspan Kooltherm ® K5 EWBExternal Rendered SystemWhile insulating the floor of an existing building is a disruptiveprocess it shouldn’t be disregarded completely as there aresignificant benefits in terms of reducing heat loss. Also if partof the remedial work includes plumbing upgrades then it mightbe prudent to take advantage of this opportunity to provideinsulation as the concrete screed will need to be excavated tosome extent.be more beneficial to have less thermal mass and thereforeplace the insulation directly below the screed.Suspended timber floors offer an excellent opportunity toprovide insulation as this can be either fitted tightly betweenthe existing floor joists or a new solid concrete floor withinsulation could be installed instead as outlined above.Separation layerFloorscreedSolid ground floorInsulation to required thickness (see chart below) is laidover the damp proof membrane or radon barrier ideallyin a ‘break bonded’ (ie. staggered) pattern. If using twolayers of insulation the vertical joints can be staggered toensure continuity of the insulation (ie. no vertical joints liningup). The insulation should be overlaid with a separationmembrane to ensure that wet screed cannot penetratethe joints of the insulation boards (eg. 500 gaugepolythene) or builders paper.A minimum thickness of 25mm of insulation should beplaced vertically along the entire perimeter of the externalwalls to ensure that the screed or concrete slab (if abovethe insulated layer) does not come into direct contact withthe blockwork - this will create an acceptable detail andtherefore prevent thermal bridging. Ideally this detail shouldbe adopted for the internal walls also.For a solid concrete floor the position of the insulation isimportant in either exposing the thermal mass of the floorto the heat provided by the system or isolating the thermalmass from it. For 24 hour, or long cycle heating systems thethermal mass of the concrete slab will ensure a more evenheating regime, therefore it might be beneficial locatingthe concrete slab over the insulation. For short intermittentheating cycles where a fast response time is required it mayWhile the insulation is a ‘closed cell’ material andtherefore does not readily absorb moisture it should not beallowed to get wet either in storage or application. Anyboards exposed to high moisture levels should be allowed tocompletely dry off prior to pouring the screed. Any visiblydamaged boards should be replaced.DoEnsure a damp proof membraneis laid under the insulation.Don’tAllow excessive gaps betweeninsulation - gaps can be filled withexpanding urethane foam andthen taped over with foil tape.Concrete slabKingspan Kooltherm ® K3FloorboardDamp proofmembraneHard coreKingspan Styrozone ®Extruded Polystyrene tobe used below DPC level.Existing external wallSolid ground floorSolid Ground FloorABCDEFGU-Value (W/m 2 K)0.120.160.250.700.700.700.70Insulation140mm Kooltherm K3100mm Kooltherm K360mm Kooltherm K3nonenonenonenone12 Kingspan Refurbishment SolutionsKingspan Refurbishment Solutions 13

Cold pitched roofExisting tile/slate battensInsulating an existing sloped ceiling may be achieved byfitting an insulated plasterboard directly to the underside ofthe existing plasterboard (though fixings will need to projectinto the existing rafters) but the benefit will be limited due tothe restriction in the depth of the insulated plasterboard.Ideally the existing plasterboard should be removed and anew layer of insulation to required thickness (see chartbelow) is fitted between and under the rafters leaving aminimum 50mm ventilated airspace between the top of theinsulation and the underside of sarking felt. Using aKingspan Plasterboard laminate (Kooltherm K17 or K18)eliminates the need to include an additional vapour check asthis is already built into the product.Tiles/slatesCold pitched roofThis system is also known as a ‘ventilated’ roof as traditionalventilation is required at eaves equivalent to 25mmcontinuous strip and ridge equivalent to 5mm continuousstrip. Care should be taken at wall/roof junctions to ensurecontinuity of the insulation and airtightness.DoEnsure a vapour control layer isprovided on the underside of therafters or use Kingspan KoolthermK17 or K18, which have a built invapour control layer.Don’tExisting sarking feltVentilated air space (50mm min)above insulation to currentBuilding RegulationsExisting raftersCold pitched roofReduce ventilated airspacebelow 50mm unless proprietarybreathable membrane has beenprovided.Kingspan Kooltherm ® K7Pitched Roof BoardKingspan Kooltherm ® K17 or K18Insulated Dry-lining BoardCold Pitched RoofABCDEFGU-Value (W/m 2 K)0.120.140.160.200.300.450.87Insulation between raftersUnder rafters150mm Kooltherm K772.5mm Kooltherm K17 or K18150mm Kooltherm K752.5mm Kooltherm K17 or K18100mm Kooltherm K762.5mm Kooltherm K17 or K18100mm Kooltherm K742.5mm Kooltherm K17 or K18100mm Kooltherm K760mm Kooltherm K7100mm Mineral Fibre14 Kingspan Refurbishment SolutionsKingspan Refurbishment Solutions 15

Warm pitched roofThis particular system will require removal of the existingslates or tiles and therefore may only be feasible when theseneed to be replaced as part of the remedial works.Tiles/slatesTile/slate battensWarm pitched roofInsulation to required thickness (see chart below) is fittedbetween and over the rafters which is then overlaid with abreathable membrane. A minimum 25mm airspace should beprovided immediately over the breathable membrane toensure adequate functioning of the membrane and to allow adrainage passage under the tiles/slates. This is achieved byfixing counter battens along the line of the rafters.This system is also known as a ‘non-ventilated’ roof astraditional ventilation at eaves and ridge is not required. Careshould be taken at wall/roof junctions to ensure continuity ofthe insulation and airtightness.DoTake care at wall and roofjunctions to ensure continuity ofthe insulation and airtightness.Don’tUse standard sarking felt forthis application.Kingspan nilvent ®Breathable Sarking MembraneKingspan Kooltherm ® K7Pitched Roof BoardExisting rafters12.5mm Plasterboard38 x 38mmcounter battenUnventilated air spaceWarm pitched roofWarm Pitched RoofABCDEFGU-Value (W/m 2 K)0.120.140.160.200.270.450.87Insulation between raftersOver rafters120mm Kooltherm K780mm Kooltherm K780mm Kooltherm K780mm Kooltherm K770mm Kooltherm K770mm Kooltherm K760mm Kooltherm K750mm Kooltherm K740mm Kooltherm K740mm Kooltherm K740mm Kooltherm K7n/a16 Kingspan Refurbishment SolutionsKingspan Refurbishment Solutions 17

Flat ceilingExisting tile/slate battensFlat ceilingInsulation to required thickness (see chart below is tightlyfitted between the ceiling joists. Using a KingspanPlasterboard laminate (Kooltherm K17 or K18) eliminatesthermal bridging through the ceiling joists and the need toinclude an additional vapour check as this is already builtinto the product.This system is also known as a ‘ventilated’ roof as traditionalventilation is required at eaves equivalent to a 10mmcontinuous strip. Care should be taken at wall/roof junctionsto ensure continuity of the insulation and airtightness.Ensure that a minimum 50mm is left between the insulationand the existing sarking felt to facilitate adequate ventilation.Ensure that electrical wiring is located above insulation(i.e. don’t place insulation directly over the existing electricalwiring between the joists). Ensure that attic hatch isinsulated and properly fitted for access opening. Ensure thata minimum of 75mm air space is maintained betweeninsulation and spotlights/downlighter fittings.DoEnsure all electrical wiring isrelocated above insulation layer.Don’tCombine different insulationmaterials without consultingthe Kingspan Technical AdviceDepartment for a detailedcondensation risk analysis.Existing tiles/slatesExisting sarking feltExisting raftersKingspan Kooltherm ® K7Kingspan Kooltherm ® K17 or K18Insulated Dry-lining BoardFlat ceilingMineral fibreKingspan Kooltherm ® K5 EWBExternal Rendered SystemExisting external wallFlat CeilingABCDEFGU-Value (W/m 2 K)0.120.140.160.200.270.450.87Insulation between joistsUnder joists200mm Kooltherm K742.5mm Kooltherm K17 or K18160mm Kooltherm K742.5mm Kooltherm K17 or K18200mm Kooltherm K7140mm Kooltherm K7100mm Kooltherm K750mm Kooltherm K7100mm Mineral Fibre18 Kingspan Refurbishment SolutionsKingspan Refurbishment Solutions 19

Closing Cavitiesdesign: www.square.ieClosing cavitiesDue to ever more stringent building regulations requiringincreased thermal performance, ‘weak’ points in the buildingfabric at junctions between floors, walls and roofs arebecoming more and more apparent. These are problemareas that need to be addressed by ensuring continuity ofinsulation and air-tightness to reduce thermal bridging.This also applies to window and door jambs in traditionalcavity wall construction where the internal block leaf returnsto meet the external leaf forming a direct thermal bridge.This can cause localised condensation and associatedmould growth especially in kitchens, bathrooms, utilityrooms and bedrooms due to the relatively cold surface atthese junctions.There are several means of tackling this, the most effectivebeing an external insulation system as discussed on page08, where a thin layer of insulation returns on the externalwindow or door jamb to encapsulate the building ininsulation. An alternative is internally dry-lining where a thinlayer of insulation also returns on the window or door jambthereby eliminating any cold surfaces internally.However if neither of these options are employed or if theexisting wall is adequate in terms of thermal performancethen Kingspan Thermabate cavity closers can be used totackle this junction directly. The process involves removingthe existing windows and cutting out the return blockwork toform a clear cavity. An appropriate width of Thermabate isthen secured to the inner leaf and the window is re-fitted, thisoption is ideal if it has been decided to upgrade the existingwindows in the house.For further information, or a copy of theKingspan Thermabate brochure simply contactKingspan Insulation Technical Advice:P: +353 (0) 42 975 4297E: techline@insulation.kingspan.com20 Kingspan Refurbishment Solutions

KCB002Kingspan Technical AdviceP: +353 (0) 42 975 4297E: techline@insulation.kingspan.comGeneral EnquiriesP: +353 (0) 42 979 5000E: info@insulation.kingspan.comW: www.kingspaninsulation.iePlease note that this document is produced as a guideline only to the requirements of the proposed buildingregulations and is designed purely to illustrate the potential performance levels achievable with Kingspan Insulationproducts. The actual Building Energy Rating will vary depending on additional specific details such as floorarea, dimensions and extent of glazing etc. and the guidance is therefore limited in this regard. An independentaccredited Energy Assessor should be employed to carry out a detailed DEAP calculation both at design stageand subsequently at completion to ensure an accurate specification for each dwelling. Accordingly, KingspanInsulation Limited accepts no liability for any errors, omissions or claims arising from the use of this document.®Kingspan, Kooltherm and the Lion Device are Registered Trademarks of the Kingspan Group plc.®Thermabate is a Registered Trademark.Registered in Ireland, No 54621. Registered office: Dublin Road, Kingscourt, Co. Cavan. VAT 4575069I