insulslab foundation system EVOLVING FOUNDATION TECHNOLOGY Established in 2010 and based in Bury, Insulslab are an innovator in the development of complete cast, in-situ foundation systems. We have made advances in foundation technology which significantly improve ground floor thermal performance without increasing insulation depth.
ur team are committed to supporting As part of the SIG plc group we have the you throughout your project to ensure support of a nationwide branch network to O you receive the complete solution guarantee that your system can be delivered CONTENTS which is tailored to your requirements. exactly where and when you need it.
Page 3 Insulslab System Page 4 Cost Savings & Benefits
Traditional Foundation methods Page 5 Beam and Block Foundation Page 5 Suspended Slab Foundation Page 5 Raft Replacement Foundation Page 6 Piled Foundation Page 6 Vibro Foundation Page 6 Contaminated Sites
Case studies Page 7 Westleigh Developments Page 7 David Wilson Homes Page 8 Thomas Armstrong Construction Page 8 Skipton Properties Page 9 Countryside Properties Page 10 Redrow, Tuttle Hill Page 11 Barratt Homes
Visit our website and download our Best Practice User Manual for the full technical details on the Insulslab system. www.insulslab.com Alternatively you can contact our technical team on: Telephone: 0844 5766 726 Email: [email protected]
2 www.insulslab.com INSULSLAB FOUNDATION SYSTEM SIMPLE TO DESIGN AND CONSTRUCT General arrangement drawings, i.e. layout for the foundations are designed by Insulslab structural engineers. Our consultants provide a plot specific engineered solution in order to minimise risk, whilst maximising any potential savings. A FULL SERVICE SOLUTION A complete specification and installation support service is available from Insulslab’s specialist technical team, including engineering, U-value calculations and on-site technical support, information provided includes: General arrangement drawings, structural calculations, U-value calculations, Bill of Quantities and Schedule of Materials. Warranties can also be provided if required.
A COMPLETE SYSTEM BENEFITS Insulslab is a complete cast in-situ system, • Excellent impact strength based on a foundation which comprises a • Maximum edge protection series of interlocking expanded polystyrene • Improved fatigue endurance pods, forming a substantially rigid ‘waffle’ shaped slab. Steel fibre reinforced concrete • A higher level of shrinkage and crack (SFRC) is poured over the top to form the control finished foundation. The steel fibres are • Greater bearing capacity manufactured in the UK by ArcelorMittal. • Steel fibres do not damage power floats The steel fibre reinforced concrete, when or concrete pumps installed in accordance with the Insulslab Best Practice User Manual, provides many benefits;
CERTIFICATION ARCELORMITTAL Insulslab, using ArcelorMittal Steel Fibres, is BBA ArcelorMittal is the only steel fibre manufacturer with certified (visit www.insulslab.com for full details) and is a production facility in the UK and the world’s largest accepted by the NHBC/LABC and Premier Guarantees. steel producer, with a total of 116 million tonnes of crude steel produced annually.
CERTIFICATE 12/4894
www.insulslab.com 3 COST SAVINGS & BENEFITS Insulslab offers substantial benefits for the developer, architect, structural engineer and ground worker
THERMAL PERFORMANCE & SUSTAINABILITY Insulslab complies with Part L (Section 6 Scotland) Building Regulations when correctly specified and constructed, providing: • Typical U-values of around 0.10 – 0.13W/ m2K, depending on P/A ratio • Approved construction detail • Significant contribution to Code for Sustainable Homes and BREEAM credit scores • Greater flexibility within the overall design of the thermal envelope • ‘Future-proof’ – low U-values facilities further code level upgrades • Reduced cart away and site traffic • Less intrusive system; perfect for brownfield sites • Less volume of concrete and steel required • Provides consistant performance during COST SAVINGS the life of the building This simple foundation solution provides: • No trenches required • Typical savings of around 25% over a cap • Minimal excavation, less disruption, on piles foundation or raft replacement reduced waste disposal • Savings vary depending on depth of • Increased speed of construction/quicker trench for beam and block or suspended completion times slabs • Reduction in labour costs
HEALTH AND SAFETY TRAINING • The system contributes positively to health & safety We provide training* to a member of any and all requirements: contractors who are directly involved in the placement • Insulslab is safer to install as no trenches are or finishing of concrete incorporating ArcelorMittal required, eliminating associated risks steel fibres for such projects. • Insulslab pods are lightweight so manual Successful trainees will be issued with a certificate handling is minimised throughout construction upon completion. • Fewer components helps minimise site traffic • Less risk of injury due to minimal reinforcing requirement • No heavy blocks to lift
*The training is a prerequisite and formal condition prior to installations taking place and is offered by and carried out by a delegated ArcelorMittal representative. (Successful trainees may be required to offer proof of completion and certification at any time by the NHBC or other third parties. The responsibility for providing this proof lies with the successful trainees and their respective entities). The issuance of the certification must be completed and received by the trainee(s) prior to the occurrence of the first installation for that individual, group, entity, or company. If in the event there are multiple individuals who have been previously trained and certified by ArcelorMittal, then those individuals may be deemed appropriate in the oversight of other people or groups within that entity for such installations.
4 www.insulslab.com Traditional Foundation Methods BEAM AND BLOCK/SUSPENDED SLAB FOUNDATION Benefits of using Insulslab foundation system in place of trench foundations
TRADITIONAL INSULSLAB
• Cost savings when compared to deep which collapse or may need to be deeper • Cleaner site build process trench or reinforced trenches or wider than initially planned • Less intrusive on site • No trenches – reduced risk of ‘over and • Improved health and safety • Improved thermal performance as standard above’ charges. The parameters for • Quicker to construct • Contributes positively to SAP/SBEM Insulslab are man-made, unlike trenches • Engineered solution calculations RAFT REPLACEMENT FOUNDATION Benefits of using Insulslab foundation system in place of a traditional raft
TRADITIONAL INSULSLAB
• Cost savings • Less steel required than in a semi • Lower design cost • Quicker to construct rigid raft foundation • Improved thermal performance as standard • Less concrete required • No ‘tumps’ or mounds that can wash • Contributes positively to SAP/SBEM away and result in more concrete being • Less excavation calculations required
www.insulslab.com 5 Traditional Foundation Methods PILED FOUNDATION/VIBRO FOUNDATION Benefits of using Insulslab foundation system in place of a traditional piled/vibro foundation
TRADITIONAL INSULSLAB
• Significant cost savings • Less excavation • Better thermal performance as standard • Quicker to construct • Simple build process with less steel work • Contributes positively to SAP/SBEM • Ability to build off piling/vibro matt, • Cleaner site conditions calculations therefore minimising the depth of • Reduced design costs foundation CONTAMINATED SITES Benefits of using Insulslab on contaminated sites
Even on more challenging sites where gas protection is required, Insulslab can provide a cost effective and rapid build solution. The partnership between Insulslab and gas protection specialists means that a site can be value engineered to comply with all the regulatory requirements (Eg. CS3/Amber 2). The coordination of the gas protection measures with the Insulslab design helps simplify the design process as well as providing a very cost effective and simple construction method.
6 www.insulslab.com Case Studies CASE STUDY 1: WESTLEIGH DEVELOPMENTS Westleigh Developments Pilots Insulslab for Affordable Homes
other foundation methods – a high priority when working on a brownfield site. We were particularly impressed with the time and cost savings Insulslab helped us to achieve, especially given the sloping profile of the site.” Comprising of 36 houses and a three storey apartment block, the affordable homes development was targeted with meeting Level 3 of the Code for Sustainable Homes. With all plots constructed of timber frame, Insulslab offered a thermally efficient and complementary ground system. Delivering typical U-values of 0.10 – 0.12W/m2K (depending on P/A ratio). Mark Gray, technical manager for Insulslab, Insulslab has provided an innovative sloping brownfield site for construction with concludes: “The decline in the availability of solution to poor ground conditions at a new maximum efficiency and minimum cost. land to develop means that brownfield sites affordable homes scheme in Nuneaton. Easily accommodating stepped profiles and will continue to be a target for new delivering the foundation up to ground floor Led by Westleigh Partnership Homes for schemes. Insulslab is increasingly being level, Insulslab provided a more cost Leicester Housing Association (LHA), adopted by developers for these effective and efficient solution than Insulslab was a key building block in the developments as the system is proven to traditional foundation techniques, such as conversion of the brownfield site into a £5 deliver cost and efficiency savings – two beam and block or raft. million residential development. key factors as the construction economy Giovanni Corbo, Westleigh Developments, looks to recover.” As a negotiated design and build fixed price comments: “We used Insulslab for the first contract, Westleigh Developments was time at this development as it offered a less faced with the challenge of preparing the intrusive and more economical system than
Case Study 2: David Wilson Homes – Southern
David Wilson Homes – Southern adapts Insulslab Richard Palmer, Commercial Director, David Wilson as a preferred technique for all new suitable Homes – Southern, comments: “As an innovator sites. ourselves, we are constantly seeking out new methods of construction that will deliver increased efficiencies Following a successful pilot of the system at its and performance. The pilot of Insulslab proved that the Chatsworth Park development in Winnersh, David system will stand up commercially, even under difficult Wilson Homes – Southern will now use Insulslab site conditions.” wherever site conditions allow. Richard continues: “The minimal ground preparation Recognising the time and performance benefits which proved a key success factor during the pilot. If we had Insulslab could deliver, David Wilson Homes – Southern been using traditional techniques, we not only would piloted the system on two plots at Chatsworth Park. have had a lot of soil to remove from site, the wet During construction site access was restricted and wet weather conditions would have made the soil moist weather conditions caused a two day delay to the two and heavier – which would have increased the cost of week foundation programme. removal. Cost and performance-wise, Insulslab is now In spite of the adverse conditions, Insulslab proved our preferred foundation system, wherever a site will quick and easy to install – resulting in the programme allow.” completing three days ahead of schedule.
www.insulslab.com 7 Case Studies CASE STUDY 3: THOMAS ARMSTRONG CONSTRUCTION insulslab specified for regeneration of Whitehaven Bungalows
low U-values were a key consideration – which Insulslab could easily satisfy.” Gary Killip, Contracts Manager, Thomas Armstrong Construction, explains: “Insulslab is an extremely easy system to use. As it significantly reduces the amount of reinforcement required, Insulslab was easier to manage on-site than traditional systems and the lightweight pods could be lifted by one man. The technical team clearly explained the installation procedure and provided excellent support when we needed it. We will definitely look to use Insulslab again.”
Insulslab has been specified by White Young Steve Pollington, Associate Director, White Mark Gray, Technical Manager, Insulslab, Green Engineering for a new timber frame Young Green Engineering, comments: “We concludes: “Insulslab is increasingly being development of 30 bungalows in specified Insulslab based on its high recognised as a cost effective and practical Whitehaven, Cumbria. Constructed by insulation performance, ease of solution to the Code for Sustainable Homes Thomas Armstrong Construction, the construction and speed of build. As the challenge. By using Insulslab in conjunction regeneration project has been designed to system incorporates steel fibre reinforced with timber frame or other highly insulated meet Level 3 of the Code for Sustainable concrete, we can also be confident in its wall constructions, developers can achieve Homes without the use of renewables. robustness over time. Finally, with the compliance simply through intelligent development creating affordable homes, building design.”
Case Study 4: HEALTH AND SAFETY a KEY FACTOR FOR SKIPTON PROPERTIES
Skipton Properties, has adopted Insulslab for its “While the time savings were significant, the health Mark Gray, Technical Manager, Insulslab, concludes: flagship Grove Mills development in Keighley. and safety benefits really stood out from a site “To ensure maximum return on investment and perspective. It was easy to train the team to install and sometimes to make construction viable, developers Replacing a traditional raft foundation system, the there were no issues with manual handling or need to increase on-site efficiency and minimise build Insulslab system has delivered a number of benefits challenges of navigating rebar and mesh around the cost. Insulslab offers an ideal solution to this, and for the site team, including efficiency gains, site. We are now using the Insulslab system for the importantly, also delivers enhanced performance performance enhancements and improvements in entire second phase of Grove Mills, and wherever benefits. As more developers realise these benefits, we health and safety best practice. possible, will be using it on all of our developments in expect traditional approaches to be left behind in Initially piloted on seven plots of phase one of the the future.” favour of this modern method of foundation scheme, Insulslab enabled Skipton Properties to construction.” complete the foundation programme in half the time a traditional raft system would have normally taken. This significant time saving was facilitated by the simplicity of system installation and ease with which the Insulslab system can be managed on-site. Alan Massie, Site Manager, Skipton Properties, comments: “As a forward thinking developer, we are always looking for innovative techniques that will help reduce the environmental impact of our projects and improve the efficiency of operations. The Insulslab system helped us to do this from the ground up, providing a revolutionary alternative to traditional foundations.
8 www.insulslab.com Case Studies CASE STUDY 5: COUNTRYSIDE PROPERTIES Countryside Properties Uses Insulslab to Drive Carbon Reduction at Affordable Homes Development
based on traditional raft techniques, using Insulslab the team was able to construct a plot foundation in just three days. “We have been extremely impressed with the speed of installation because in spite of a late start on-site, we were able to make the time back by using timber frame in conjunction with the Insulslab system – two very efficient and modern methods of construction.” The simplicity of Insulslab system installation is facilitated by the components being easy to manage. For example, the expanded polystyrene pods minimise manual handling as they are sufficiently light for a one-man lift, while the use of steel fibre reinforced concrete removes the need for traditional steel reinforcement, Having been targeted to achieve an was also a former steelworks, there were which can often prove difficult to additional 25% carbon reduction on top of additional challenges with regards to manoeuvre on-site. the Building Regulations, Countryside ground preparation and foundation Mark Gray, Technical Manager, Insulslab, Properties turned to Insulslab, to increase construction. Requiring minimal ground concludes: “The Insulslab system is energy efficiency at Saxon Park – a new excavation and no trenches, Insulslab specified for three reasons – time saving, affordable homes development in provided an efficient foundation technique cost saving and enhanced thermal Warrington. that could also easily accommodate sloping performance. The installation programme at parts of the site. This included a stepped At the time of plot registration, the Saxon Park demonstrates how the system construction of 2.2 metres in one area, development was required to meet Level 3 can simultaneously deliver on all three which would not have been possible with a of the Code for Sustainable Homes, with counts, even under the most challenging of traditional raft. specific employer requirements mandating site conditions or timescales.” that it must also significantly improve on the Andrew Fox, Technical Standards Manager, current Building Regulations for carbon Countryside Properties’ comments: “Given reduction. the challenges facing us on the site and the stringent energy efficiency criteria set by As a system that integrates insulation into the client, we needed a solution that would its design using lightweight expanded deliver the required performance without polystyrene (EPS) pods, Insulslab achieves significantly impacting on build cost. The very low U-values, typically 0.10 – 0.12W/ flexibility of the Insulslab system and its m2K (depending on P/A ratio). With steel proven thermal insulation credentials made fibre reinforced concrete poured on top of it the best specification for Saxon Park, as the pods, Insulslab delivers the foundation the higher levels of insulation in the floor up to ground floor level, contributing to the made it easier for us to meet the required overall thermal performance of the building performance without having to increase envelope. floor depth or insulation in the wall cavities.” Used in conjunction with a standard open Although Countryside Properties originally panel timber frame system at Saxon Park, looked to Insulslab as a solution to help Insulslab offered increased speed of achieve the specified carbon reduction, the construction, improved airtightness and the system also proved a key factor in virtual eradication of thermal bridging at increasing on-site efficiency. While ground-level due to the two systems ground-workers Caldwell Construction efficiently integrating together. As the site originally anticipated one week per plot
www.insulslab.com 9 Case Studies CASE STUDY 6: REDROW Redrow has become the latest national housebuilder to benefit from significant time and cost savings by using Insulslab in place of traditional foundation techniques.
Piloted on the Eliot’s View development in future, where site conditions allow, we A suite of technical support materials are Nuneaton, Redrow moved from a standard would definitely use the system again.” available to assist with the specification and raft foundation to Insulslab part way through installation of Insulslab, all of which can be Importantly for Redrow, the cost savings of construction, after the potential cost savings accessed at www.insulslab.com. using Insulslab did not come at the expense became apparent. of performance, with the super insulated Spencer Robinson, Operations Director, Eliot’s View is a development of foundation system providing superior Insulslab, concludes: “Redrow’s approximately 120 houses, with a mixture of thermal insulation as compared with a development at Eliot’s View is a prime two, three and four-bedroom homes. Under standard raft. By integrating high levels of example of how Insulslab offers real cost presssure to deliver the site to programme insulation into its design, Insulslab can advantages over traditional raft, even where and budget, Redrow adopted Insulslab as an achieve U-values around 0.10-0.13W/m2K the ground conditions are not particularly alternative to traditional raft foundations. (depending on P/A ratio), while keeping challenging. By evaluating total cost of build floor depth to a minimum. The commercial as opposed to material costs in isolation, Stuart Walker, Senior Quantity Surveyor, benefits and performance credentials of Insulslab is consistently more favourable Redrow Homes (Midlands), comments: Insulslab are underpinned by an expert commercially.” “Changing construction techniques part techical team, on hand to support housing way through a project is not a decision we developments from planning through to take lightly, but the financial case for foundation construction. Stuart continues: moving to Insulslab from a traditional raft on “The techical service provided by Insulslab this development was definitive. is excellent. They are extremely efficient The best way to describe Insulslab is that it with the supply of technical drawings and is like a raft – only quicker and more cost were there exactly when we needed them effective. Given a similar situation in the to be on-site during the first phases.”
10 www.insulslab.com Case Studies CASE STUDY 7: BARRATT HOMES Barratt Homes Achieves Cost Savings ‘From the Ground Up’ with Insulslab
Barratt Homes has benefitted from both insulation. The installation process is Andrew Orriss, Insulslab, concludes: time and cost savings at ‘The Elms’, a new extremely quick and it is one of the safest “Insulslab is now widely accepted as a cost build development in Stockton on Tees, systems to manoeuvre on-site – we have effective and higher performing alternative after replacing a traditional raft foundation been very impressed.” to traditional foundation techniques. The structure with Insulslab. system is increasingly being adopted by While Barratt Homes has adopted Insulslab housebuilders who are faced with Delivering the foundation up to ground floor on a number of previous developments challenging ground conditions where level, Insulslab has been used to construct nationwide, ‘The Elms’ is the first time the standard methods would be cost prohibitive, a mixture of 18 detached and two semi- system has been used by the current site yet Insulslab can provide a competitive and detached homes on the site to date, with a team and groundworker, Lee Construction. efficient solution.” further 11 due for completion by the end of Commenting on his experience of Insulslab, the year. Lee Green, Managing Director, Lee Overall project cost savings have been Construction, said: “Using Insulslab enabled realised through the significant reduction in us to save approximately three days per labour time and simplicity of installation plot, which makes a major difference in procedure, which also offers benefits from a terms of project progression. The system health and safety perspective. also helped us keep to the site programme because the absence of trenches meant Craig Gilhespie, Site Manager, Barratt there was no risk of collapse – allowing us Homes, explains: “Although cost is to carry on working even in adverse inevitably a driver in any development these weather conditions.” days, Insulslab has gone beyond this by offering improvements on thermal
www.insulslab.com 11 Insulslab Tel: 0844 5766 726 Email: [email protected] www.insulslab.com
North & Scotland
Michael Gilliead Tel: 07801 645 756
South East Mike Rees & Midlands Tel: 07921 685 122 Barry Stokes South West Tel: 07711 418 131 & Wales
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V1 – 2015