The low cost solution for reduced carbon emissions
keystonelintels.com
Evolution of lintels
Evolution
Our lintels are engineered to be the most structurally and thermally efficient lintels available.
We have continually evolved and expanded our product range to reflect the needs of our industry. keystonelintels.com keystonelintels.com Innovation Leaders in 1967 open backlintel IG original Support Masonry 2010 1980 a lintel company toinsulate IG 1ststeellintel Lintels Break Feature 2010 Evolution
1989 1992 2009 Keystone Thermal Hi-therm Steel Lintels Breakplate Lintels
2011 2017 Brick Slip Hi-therm+ Masonry Support Lintels Contents
CONTENTS
04 Award Winning Innovation
07 Unique Patented Design
08 Key Benefits
09 Better Buildability
10 Thermally Efficient
12 Cost Effective
13 Housebuilder Testimonials
14 Loading Tables
16 Case Studies keystonelintels.com
3 4 keystonelintels.com Innovation Winning Award for itsinnovation. has wonmultipleawards steel lintelindustryand has revolutionisedthe The Hi-thermlintel Fabric Building Best of theyear Innovation Commercial of theyear Product Build ItAwards Housebuilder ProductAwards Construction NewsAwards Housebuilder Awards Product Best Eco the limit The sky’s “ experts say What the Crest Nicholson Quality Director, Group Technical & Darren Dancey Code 4site.” effective optiononthis junction, makingitacost window anddoorhead bridging throughthe reducing thethermal approach by significantly contributes tothis and theHi-thermlintel a fabricfirstapproach development through saving requiredona the carbonandenergy approach ofachieving traditionally take the Keynes. CrestNicholson development inMilton lintels onourOakgrove We specifiedHi-therm “ Taylor Wimpey Portfolio Director UK Housing Paul Jenkins design andperformance.” in turnaidsconsistency current processeswhich working inlinewithour enables trades tocontinue existing sitepractices; it added benefitofutilising solution thathasthe Hi-therm isacosteffective limit thermalbridging. energy performanceand drive toimproveour of developmentsina Hi-therm onanumber We haveutilised “ “ Construction NewsAwards Will Botting Barratt Homes Technical Director Group Design& Michael Finn specification upgrades.” as partofasuite cost effectiveoption has provedtooffera The Hi-thermlintel Energy Efficiency, TFEE). standard (Target Fabric fabric performance mandatory minimum order tocomplywiththe sustainable solutionsin analysed arange of regulations Barratts Part L2013building unveiled itschangesto When thegovernment being developedanditssuccessfirmlyevident.” as anexampleofaproblembeingidentified,solution This innovationthoroughlyimpressedthejudgingpanel Award WinningInnovation “ AES SouthernLtd Sustainability Consultants regulation/FEEs targets” increasing building help tomeettheever specified, cansignificantly compliance and,when first approachtomeet in achievingafabric its lowPsiValue assists The Hi-thermlintelwith
3 keystonelintels.com 6 keystonelintels.com the Hi-thermlintelutilisingourindustryleadingtophatdesign. Keystone hasinvestedheavilyinResearchandDevelopmenttore-engineer to offerevengreaterpracticality tobuilders. The awardwinningHi-thermlintelhasbeenupgraded now The Originalis required buildingregulations. solution forcompliancewiththe advise clientsontheoptimumlintel software tocalculatePsivaluesand latest ‘PhysibelTrisco’ analysis thermal lintel. Ourin-houseexpertsusethe efficientthermally thanastandard steel isuptofivetimesmoreHi-therm+ Performance Thermal achieved aonehourfire performance. 1999, atExovaWarrington Fire and fire testinaccordance withBSEN1363-1 lintelshavebeensubjectedtoa Hi-therm+ Fire Performance even better Polymer hybriddesign. Patented GalvanisedSteel&Rigid Material Performance to BSEN845part2. undergone rigorous structuraltesting hasBBAcertificationhaving Hi-therm+ BBA Certification Insulation Patented Design Unique Trusted 3rd partyapproval Steel Thermal BreakThermal Unique PatentedDesign
7 keystonelintels.com Key Benefits
The Hi-therm+ lintel is unsurpassed in terms of thermal efficiency, buildability and technical support.
Buildability Thermal Efficiency Cost Effective
Better buildability – offers Hi-therm+ is the only BBA A low cost route to improve the simplicity of a one piece, approved one piece lintel both CO² reduction & Fabric structurally superior top hat solution which achieves the Energy Efficiency standards in design creating stability during appendix R value for steel line with Part L Building the building process, unlike a lintels in Part L 2013, depending Regulations (see page 12 two part lintel solution. on wall construction. to compare Hi-therm+ cost efficiency with other Hi-therm+ is manufactured with Up to 5 times more thermally popular alternatives). a wider range & longer lengths. efficient than a standard steel cavity wall lintel therefore reducing thermal bridging & improving SAP calculations. Better Buildability
Split lintels - in some cases split lintels may be offered as a means of enhancing thermal performance however they are in no way comparable in terms of efficiency or buildability to the Hi-therm+ sustainability lintel.
Good Detailing Poor Site Detailing
Split Lintels
Hi-therm+ closes the cavity. A cavity closer must be supplied and fitted ££.
The single component design Requires two separate lintels with double simplifies installation. the handling and installation labour ££.
The one piece design assists stability between Individual lintels will require propping and additional the internal and external leaves and creates wall ties will be required to overcome the lack of stability during the build process. inherent stability in a split lintel solution ££.
Hi-therm+ gives cost certainty with no additional costs. ££ = Additional Costs. keystonelintels.com
9 10 keystonelintels.com efficient thanastandardsteellintel. Up to5timesmorethermally The provensolutiontoPartL * basedonadefaultlintelpsivalue of0.5W/m.K eliminating thermalbridging. house. UsingaHi-therm+lintelreduces thisfigure to0.25%virtually approximately 6%*oftheoverallheatlossthrough thefabricof area of60m²,theheatlossthrough astandard lintelcanaccountfor For exampleinamodernwellinsulated3bedroom housewithafloor thermal performanceofabuilding. bridge, meaninglintelscanhaveanimportantimpactonthe overall these elementsup.Lintelsare inmostcasesthesignificantthermal fabric i.e.walls,floors, roofs andthematerials/componentsthatmake The FEEStarget putsfocusonthethermalperformanceofbuilding dwelling, meaningmore efficient homes. the fabricrightatbeginningwillsaveenergy forthewholelifeof airtight. Asthefabricofbuildingwillremain forthelifetime,getting waste byensuringthefabricofbuildingisadequatelyinsulatedand The introduction ofFEES is basedontheprincipalofpreventing energy Part LChallenge measures CO introduced inadditionto the original(TER)Target EmissionRatewhich Part L,amandatory(FEES)FabricEnergy Efficiency Standard hasbeen performance ofnewandexistingbuildings.Inthelatestchangesto Building RegulationsPartLsetstheminimumstandards forenergy The BuildingRegulationsPartL Efficient Thermally ² . 3 0.03-0.06 Psi Value 2 3 1 Polymer Thermal Insulator Polymer Thermal acts asaneffective break. thermal insulator Rigid polymerthermal Galvanised steelinner&outerleaf. Galvanised Steel performance ofthelintel. performance insulation enhancesthethermal Prefitted expandedpolystyrene Insulation 2 ( Ψ ) 1
3 Thermally Efficient
SAP 2012 and Appendix R The Importance of lintels
‘Standard assessment procedure’ (SAP) is adopted Hi-therm+ can achieve the Appendix R value for steel by government as the UK’s methodology for calculating lintels in Part L 2013 depending on the wall construction. the energy performance of buildings and ultimately This table shows how Hi-therm+ outperforms other demonstrating compliance with Part L Building Regulations. commonly used lintel types.
Appendix R of SAP 2012 provides a specification for a Lintel Type Comparison notional dwelling of identical proportions and dimension which provides the target for the CO² and the FEES. If a dwelling is built conforming to Appendix R values it will Hi-therm+ Lintel 0.03 - 0.06 W/m.K achieve the CO² and Fabric Energy Efficiency targets to comply with Part L. Part L Appendix R value 0.05 W/m.K Appendix R requires a lintel Psi value of 0.05 W/m.K, which the Hi-therm+ lintel achieves (see the psi value Standard Lintel 0.22 W/m.K comparison chart).
The Importance of Psi Values Default Non Plated Steel Lintel 0.33 W/m.K
The thermal performance of a lintel is expressed in terms of a Psi value ( Ψ ) i.e. linear thermal transmittance Plated Steel Lintel (Default) Table K1 0.5 W/m.K which is more commonly referred to as ‘thermal bridging’.
The increasing focus on thermal bridging means * Depending on wall construction that materials specifications and component selection need to be carefully considered as part of the overall compliance strategy to meet Part L. Thermal Break
Poorly performing products and SAP calculations using default Psi values are increasingly penalised, the only way to improve the SAP calculation at this stage will be to over compensate in the design by improving other areas of the fabric such as higher performing insulation, wider cavities or bolt on renewables ultimately increasing the build cost.
To design efficiently for Part L, it’s important that energy assessors use independently calculated psi values or manufacturer calculated psi values providing they have been calculated by a trained person using specialist thermal modeling software. Keystone’s technical support team are trained and accredited to provide specific psi value calculations free of charge that can be directly input in to SAP calculations
Talk to our Technical experts to find out how Hi-therm+ could save money on your build specification. keystonelintels.com
11 Cost Effective
Hi-therm+ offers a cost effective solution to lowering carbon emissions within SAP offering significant savings compared to other popular alternatives.
For example in a comparative case study for a house type, using Hi-therm+ would incur less than 20% of the cost of increasing the cavity width by 50mm for the same saving in CO². These CO² savings are important within SAP because they give flexibility for compliance in situations where other built details are not meeting the standards in Appendix R.
Comparison of popular solutions to reduce carbon emissions by 1kg
Flue Gas Heat Recovery Waste Water Triple Glazing Heat Recovery
£1041.67 Weather £1,449.28 £769.23 MVHR AIR 4 Compensator on boiler
£1,315.79 £625.00
Increase from 100 to 150mm 2 No.PV Panels cavity £2,419.35 £606.06
MOST LEAST MVHR AIR 5 £2,419..35 £400 EXPENSIVE EXPENSIVE SOLUTION SOLUTION
This case study is based on an actual semi detached 75m², 3 bedroom house design and the figures were produced by an independent energy assessor using SAP 2012 software. keystonelintels.com
12 Testmonials
House Builder Testimonials
Barratt Homes
Hi-therm significantly reduced thermal bridging on all house types helping to meet Part L 2013. (see page 17)
Gospel Oaks
Hi-therm saved more than £200 per plot by enabling the use of a reduced cavity width. (See page 18)
Coxon’s Mews
Hi-therm saved thousands of pounds by removing the need for PV panels. (see page 18)
Berewood
The use of Hi-therm saved £1,000’s by negating the use of costly alternatives. (See page 19)
Saxon Place
Hi-therm saved more than £300 per plot by reducing the required level of insulation. (See page 20)
East Riding
Hi-therm provided an easily installed Part L solution in comparison to a complex split lintel option. (See page 21) keystonelintels.com
13 Loading Tables keystonelintels.com
14 Loading Guide Tables
STANDARD LOAD Section Profiles
HT/S+ 100 For cavity widths 90 -105
Maufactured Length 600- 1350- 1650- 1950- 2250- 2550- 2850- 3150- 3750- 150 increments 1200 1500 1800 2100 2400 2700 3000 3600 4200
Height (h) 100 107 150 150 175 190 190 234 234
Thickness 1.6 2.0 2.0 2.0/2.5 2.0/.2.5 2.5 2.5/2.9 2.9 3.2
Total UDL kN 3:1 12 16 19 21 23 27 27 27 27
Total UDL kN 19:1 10 13 16 17 18 22 20 20 22
HT/S+ 110 For cavity widths 110 -125
Maufactured Length 600- 1650- 1950- 2250- 3150- 3750- 150 increments 1500 1800 2100 3000 3600 4200
Height (h) 118 118 130 190 234 234
Thickness 2.0 2.0/2.5 2.5 2.5/2.9 2.9 3.2
Total UDL kN 3:1 16 22 21 27 27 27
Total UDL kN 19:1 13 18 17 22 20 22
HT/S+ 130 For cavity widths 130 -145
Maufactured Length 600- 1650- 1950- 2250- 3150- 3750- 150 increments 1500 1800 2100 3000 3600 4200
Height (h) 118 118 130 190 234 234
Thickness 2.0 2.0/2.5 2.5 2.5/2.9 2.9 3.2
Total UDL kN 3:1 16 22 21 27 27 27
Total UDL kN 19:1 13 18 17 22 20 22
HT/S+ 150 For cavity widths 150 -165
Maufactured Length 600- 1650- 1950- 2250- 3150- 3750- 150 increments 1500 1800 2100 3000 3600 4200
Height (h) 118 118 130 190 234 234
Thickness 2.0 2.0/2.5 2.5 2.5/2.9 2.9 3.2
Total UDL kN 3:1 16 22 21 27 27 27
Total UDL kN 19:1 13 18 17 22 20 22
NOTE: The exact lintel profile may vary For HD and XHD loading tables please contact our technical team on 01283 200 150. dependent on lintel length and loading. keystonelintels.com
15 16 keystonelintels.com Studies Case specifying Hi-thermlintels. cost andbuildabilitybenefitsof projects whichhighlightthe The followingcasestudiesdetail Case Studies
New Barratt Homes Sites throughout the UK.
Specifying Hi-therm significantly reduced thermal bridging on all house types. Project Details
“When the government unveiled its changes to Part L 2013 – Barratts are required to meet the increased building regulations Barratts analysed a range of sustainable performance demands on plots which must solutions in order to comply with the mandatory minimum fabric comply with part L 2013. performance standard (Target Fabric Energy Efficiency, TFEE). Hi-therm Solution The Hi-therm lintel has proved to offer a cost effective option as part of a suite of specification upgrades.” – Full technical support and site-specific Psi value calculations provided. – Hi-therm significantly reduces the thermal Michael Finn bridging through window & door head Group Design & Technical Director junctions to achieve class leading values. Barratt Homes – Hi-therm lintels are single piece and fitted in the same method as a standard steel lintel, so require no special arrangements onsite.
Oakgrove Village Milton Keynes, Buckinghamshire.
Specifying Hi-therm significantly reduced thermal bridging on all house types. Project Details
– Crest Nicholson were required to build “We specified Hi-therm lintels on our Oakgrove development in all house types on their Oakgrove Village Milton Keynes where we are required to meet Level 4 of the CfSH. development to meet Level 4 of the Code for Sustainable Housing. Crest Nicholson traditionally take the approach of achieving the carbon and energy saving required on a development through a Hi-therm Solution fabric first approach and the Hi-therm lintel contributes to this approach by significantly reducing the thermal bridging through – Full technical support and site-specific the window and door head junction, making it a cost effective Psi value calculations provided. – Hi-therm significantly reduced the thermal option on this Code 4 site.” bridging through all window & door head junctions across all house types in the development. Darren Dancey – Hi-therm lintels are fitted in the same method Group Technical & Quality Director, as a standard steel lintel, so had no impact Crest Nicholson on the construction sequencing. keystonelintels.com
17 18 keystonelintels.com “ “ Lychgate Homes Buyer Frank Sandkey homes withthesimpleinstallationofsinglepiecelintels.” bridging, helpingustomeetlevel4inthecodeforsustainable lintel whichsignificantlyloweredtheamountofthermal Ashby Energy, ourenergyassessor, introducedtheHi-therm work theywouldinvolve. alternative producttoavoidtheincreasedhandlingandsite When splitlintelswerespecifiedforthisprojectIlooked foran Wrekin EcoHomes Project Co-ordinator/Owner Richard Southgate technology orwidercavities.” us meetthenewregulationswithoutneedforcostlyrenewable bridging asmuchHi-therm.Thisfabricfirstapproachhasenabled No othersinglelintelproducthasenabledustoreducethermal overall thermalperformance. always lookingforcosteffectivesolutionstoimprovingthebuilding’s approach. WiththenewPartL2013regulationstighteningweare impressed withtheinnovationofHi-thermlintel’s fabricfirst As anexperiencedbuilderofeco-friendlyhomes,wewerevery Ashby-De-La-Zouch, Leicestershire. Coxon’s Mews Tipton, West Midlands. Gospel Oak negating theuseofcostlyalternatives. The useofHi-thermsaved£1,000’s by without any specialistbuildtechniques. dramatically improvedthefabricperformance Hi-therm savedmorethan£200perplotand sustainabletechnologies. maintenance associatedwithmanyother doesnotrequire– Hi-therm anyofthe buildtechniques. withoutanyadditionalorspecialist performance dramatically improved Hi-therm thefabric – insteadofa125mmwidth. perplotbyenablingtheuseofa100mmcavity savedmore– TheuseofHi-therm than£200 Solution Hi-therm – Wrekin soughtoutthelatestfabricfirstsolutions. Eco HomesinTipton, West Midlands. – Wrekin Homespurchased thesitetodevelop Project Details – No ongoingmaintenancerequired. complexity ofsplitlintels. – wassimpletoinstall,avoiding the Hi-therm the useofwidercavitiesorPVunits. enablingtheenergy target tobemetwithout bridgingwassignificantly thermal reduced – asafabricfirstsolution, By usingHi-therm Solution Hi-therm Level 4energy/CO2 targets. Cavity orthe useofPVpanelstomeet – Designoptionsincludedeither125mm forsustainablehomesperformance. 7duplexapartmentsrequired Level4Code – Theplanningapproval for4retail unitsand Project Details Case Studies
Berewood Waterlooville, Hampshire.
The use of Hi-therm saved £1,000’s by negating the use of costly alternatives. Project Details
“The Waterlooville site was required to meet Level 4 of the code for – The Berewood development includes a full sustainable homes. We wanted to achieve compliance and deliver the range of property types from 1 to 5 energy savings with a cost effective fabric first approach rather than bedrooms and Hi-therm was specified on each the use of complex and expensive renewable technologies. Having home within the 168 acre site. discussed this with our energy assessor and our lintel supplier we decided to specify the Hi-therm lintel. Hi-therm Solution
This choice delivered reduced thermal bridging at the head junctions – The use of Hi-therm was a significant contributor to the achievement of Level 4, Code for and openings allowing us to meet our carbon targets. We particularly sustainable homes. valued the fact that no changes to our construction practices on-site – Full technical support provided to develop were required.” a suitable specification for the site. – Hi-therm does not require any special Phil Jackson installation techniques. Group R&D Manager Bloor Homes
St. Inns Moira, Co. Armagh.
The use of Hi-therm contributed savings of more than £1,000 per plot on other technology. Project Details
– St. Inns development at Moira, Co. Down, “ Using the Hi-therm lintel helped us to achieve a pass rating keeping includes detached and semi-detached 3 and the air test above 5, therefore removing the need for mechanical whole 4 bedroom house types and Hi-therm house ventilation/heat recovery, or alternatively other renewable was specified on each home. energy products such as PV. Hi-therm Solution Whilst the Hi-therm was not the only resolution, it is a combination of – Full technical support and site-specific various products and u-values etc. which achieve the pass; Hi-therm Psi value calculations provided. helped to achieve the pass in this instance.” – Hi-therm’s performance contributed to the saving of upwards of £1000 per plot on other Chris Carroll sustainable technology. Quantity Surveyor – Hi-therm does not require any ongoing Lagan Homes maintenance, unlike many alternative sustainability solutions. keystonelintels.com
19 20 keystonelintels.com “ “ Penwortham, Lancashire. Saxon Place Red OakDevelopments Neil Sheilds carbon emissionswithinSAP.” compared tothedefaultandcontributedsignificantlylowering Hi-therm gavea95%reductioninthethermalbridgingduetolintels efficient, quicktoinstall andyethighlyattractive. Choosing with thenewHi-thermlintelstogiveaproductthatwasthermally We combinedKeystone’s PrefabricatedInsulatedBrickFlatArch and traditionally beautiful. We wantedtocreateahomethatwasbothenergyefficient homes. TheKingsHillprojectwasdesignedtoahighspecification. Red OakDevelopmentsiscommittedtobuildingenergyefficient Alton, Hampshire. Kings Hill Rowland Homes Senior Buyer Scott Warley effective tobuild.” of thermalperformancewhileatthesametimebeingextremely cost we weresoimpressedby whattheHi-thermlintelofferedusinterms will lowertheirenergycostsandminimisemaintenance.That’s why At Rowlandweaimtobuildabetterhomeforourhousebuyerswhich improve theenergyefficiencyofdwellings Hi-therm reducedthermalbridgingto saved over£300perplotonwallinsulation. The useofHi-thermsustainabilitylintel installation techniques. – doesnotrequireHi-therm anyspecial psivaluecalculationsthrough toinstallation. – Keystoneoffered specialistsupportfrom theinitial energy efficiency oftheproperties. significantlyimproved– TheuseofHi-therm the Solution Hi-therm withsustainabilityinmind. Kings Hillishighlyenergy efficient andbuilt – LikeallRedOakDevelopmentshomes accommodationsetinhalfanacre. – Beautifulhomewithover3100sqftof Project Details providing £1,000’s ofsavings overall. wasspecifiedonallhousetypes – Hi-therm reduced from 0.32w/m/hto0.36w/m/h. byenablingthewallinsulationcosttobe savedover£300perplot – TheuseofHi-therm fabricspecification. Rowland wasabletore-assess theoverall – ByutilisingHi-therm’s enhancedpsivalue, Solution Hi-therm latest sustainabletechnologies. environmentally efficient homesusingthe – Rowlandiscommittedtobuilding landscapedtocreate amature, establishedfeel. bedroom housesinascheme, designedand – Thisisaqualitydevelopmentof61,3and4 Project Details Case Studies
New Jelson Homes Sites throughout the UK.
The use of Hi-therm saved up to £400 per plot on PV panels. Project Details
“ When introduced to Hi-therm, Jelson’s energy assessors – To meet the required codes and building discovered they could considerably enhance the energy regulations for their standard house type, performance of the houses by adopting the use of Hi-therm Jelson Homes had adopted a specification in all their house types. requiring a 100mm cavity and the use of PV panels to enhance their energy performance. The increase in performance was so substantial that it enabled the assessors to still meet the building codes while removing one Additional Issues to two PV panels per plot at a saving of £350 - £400 per panel. – Unlike other sustainability technologies, Hi-therm lintel does not require any As a result of these cost efficiencies, Jelson now include Hi-therm ongoing maintenance throughout the sustainability lintels in the specification of all new builds life of the building. going forward.”
New Developments East Riding PHASE 4 Housing.
Solved site issues and helped them meet thermal bridging requirements.
“ Within the Building Design department of East Riding of We were introduced to the Hi-therm Lintel which our Yorkshire Council we are constantly looking at products which technical team and Energy Assessor recognised would offer will enhance the quality and performance of our buildings. benefits over split lintels from a technical and building construction perspective. As a result, we have now specified We were specifying a split lintel solution with 150mm wide the Hi-therm Lintel for our next phase of affordable homes.” cavities for our affordable housing developments to help lower thermal bridging and meet building regulations. Mark Thomas Senior Architect, However, the split lintel option was causing installation issues ERI&F Building Design on site with the insulation and DPC detail around the split lintels and therefore we were looking for a solution to ease the installation and maintain the thermal insulation continuity. keystonelintels.com
21 Notes keystonelintels.com
22 keystonelintels.com 01.18
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