New Barratt Homes Sites Throughout the UK
Total Page:16
File Type:pdf, Size:1020Kb
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 Leaders in Innovation 1967 1980 IG original IG 1st steel lintel open back lintel company to insulate a lintel 2010 2010 Masonry Brick Feature Support Lintels keystonelintels.com Evolution 1989 1992 2009 Keystone Thermal Hi-therm Steel Lintels Breakplate Lintels 2011 2018 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 House Builder Testimonials 14 Loading Tables 18 Extended Range 20 Case Studies keystonelintels.com 3 The Sky’s Award the Limit Winning Product of the Year Innovation Housebuilder Awards Commercial Innovation of the Year The Hi-therm lintel Construction News Awards has revolutionised the Best Building steel lintel industry and Fabric has won multiple awards Product Housebuilder Product Awards for its innovation. Best Eco Product Build It Awards keystonelintels.com 4 Award Winning Innovation “ This innovation thoroughly impressed the judging panel What the as an example of a problem being identified, a solution being developed and its success being firmly evident.” experts say Will Botting Construction News Awards “We specified Hi-therm “ We have utilised “ When the government “ The Hi-therm lintel with lintels on our Oakgrove Hi-therm on a number unveiled its changes to its low Psi Value assists development in Milton of developments in a Part L 2013 building in achieving a fabric Keynes. Crest Nicholson drive to improve our regulations, Barratts first approach to meet traditionally take the energy performance and analysed a range of compliance and, when approach of achieving limit thermal bridging. sustainable solutions in specified, can significantly the carbon and energy order to comply with the help to meet the ever saving required on a Hi-therm is a cost effective mandatory minimum increasing building development through solution that has the fabric performance regulation (Fabric Energy a fabric first approach. added benefit of utilising standard (Target Fabric Efficiency Standard, The Hi-therm lintel existing site practices; it Energy Efficiency, TFEE). FEES) targets.” contributes to this enables trades to continue working in line with our The Hi-therm lintel approach by significantly Sustainability Consultants current processes, which has proved to offer a reducing the thermal AES Southern Ltd bridging through the in turn aids consistency in cost effective option window and door head design and performance.” as part of a suite of junction, making it a cost specification upgrades.” effective option on this Code 4 site.” Darren Dancey Paul Jenkins Michael Finn Group Technical & UK Housing Group Design & Quality Director Portfolio Director Technical Director Crest Nicholson Taylor Wimpey Barratt Homes keystonelintels.com 3 The original is now even better The award winning Hi-therm lintel has been upgraded to offer even greater practicality to builders. Keystone has invested heavily in Research and Development to re-engineer the Hi-therm lintel utilising our industry leading top hat design. Fire Performance Material Performance Hi-therm+ lintels have been subjected to a Patented galvanised steel & rigid fire test in accordance with BS EN 1363-1 polymer hybrid design. 1999 at Exova Warrington Fire and achieved a one hour fire performance. Thermal Performance BBA Certification Hi-therm+ is up to five times more Hi-therm+ has BBA certification having thermally efficient than a standard steel undergone rigorous structural testing lintel. Our in-house experts use the to BS EN 845 part 2. latest ‘Physibel Trisco’ thermal analysis software to calculate Psi values and advise clients on the optimum lintel solution for compliance with the required building regulations. keystonelintels.com 6 Unique Patented Design Unique Patented Design Insulation Steel Thermal Break Trusted 3rd party approval keystonelintels.com 7 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 that achieves the Energy Efficiency standards, design creating stability during appendix R value for steel in 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 necessary 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 2 Thermally Efficient 3 Up to 5 times more thermally 1 efficient than a standard steel lintel. 3 The proven solution to Part L The Building Regulations Part L Psi Value (Ψ) Building Regulations Part L sets the minimum standards for energy performance of new and existing buildings. In the latest changes to 0.03-0.06 Part L, a mandatory (FEES) Fabric Energy Efficiency Standard has been introduced in addition to the original (TER) Target Emission Rate which measures CO². 1 Insulation Pre-fitted expanded polystyrene Part L Challenge insulation enhances the thermal performance of the lintel. The introduction of FEES is based on the principal of preventing energy waste by ensuring the fabric of the building is adequately insulated and airtight. As the fabric of the building will remain for the lifetime, getting 2 Polymer Thermal Insulator the fabric correct at the beginning will save energy for the whole life of the Rigid polymer thermal insulator dwelling, meaning more efficient homes. acts as an effective thermal break. The FEES target puts focus on the thermal performance of the building 3 Galvanised Steel fabric i.e. walls, floors, roofs and the materials/components that make these elements up. Lintels are in most cases the most significant Galvanised steel inner & outer leaf. thermal bridge, meaning lintels can have an important impact on the overall thermal performance of a building. For example, in a modern well insulated 3 bedroom house with a floor area of 60m², the heat loss through a standard lintel can account for approximately 6%* of the overall heat loss through the fabric of the house. Using a Hi-therm+ lintel reduces this figure to 0.25%, virtually eliminating thermal bridging. * based on a default lintel Psi value of 0.5 W/m.K. keystonelintels.com 10 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 Lintel Type 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) 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 is 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 modelling software. Keystone’s technical support team are trained and accredited to provide specific Psi value calculations free of charge that you can directly input in to SAP calculations.