4 WEDGWOOD ROAD
OXON OX26 4UL
Tel: 0845 241 3390 / 01865 290890
Fax: 0845 241 3391
Suppliers of: thermal breaks thermal bridging balcony rebars reinforcement, connectors load bearing connectors structural reinforcement balcony connectors thermal breaks
Schöck are specialists in the supply of innovative and effective solutions for applications such as structural thermal insulation, thermal bridging breaks and noise suppression in new buildings.
CAD & BIM Files are available to download: click here
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Schöck are the UK suppliers of:
Schöck Isokorb® is the heat-insulating load-bearing thermal break for cantilever balconies. Isokorb® prevents thermal bridging and is used for connecting reinforced concrete to reinforced concrete, reinforced concrete to steel and steel to steel balcony decks. Isokerb can be used on both new build and for upgrading of existing balconies.
The Schöck Thermoanker is the energy-efficient alternative to conventional stainless steel lattice girders when connecting the concrete skins of core-insulated sandwich and element walls. Compact and easy to install, it also improves cost efficiency when prefabricating concrete parts. The Schöck Thermoanker can be used in conjunction with any type of insulating material, thus offering prefabricating plants and architects a construction material for thermal breaks in façades that is fit for the future.
The point between the basement slab and outer walls is a danger area where thermal bridges and damp can easily form. Novomur is a insulated block that prevents thermal bridging and damp penetrating buildings at ground level, it serves as the first course at the point where the basement ceiling forms the ground floor outer and inner walls. Novomur® thermal block is built into the first course of brick or blockwork and is available in all regular wall thickness’s: 100 mm, 115 mm, 150 mm, 175 mm, 200 mm and 240 mm and comes in 750 mm standard lengths.
Whether you are installing concrete slabs in high-rise buildings or supporting walls in underground garages: Distributing the shear forces in dilation joints usually requires additional time and effort. Schöck Dorn are quite the opposite. The shear reinforcement and heavy-duty dowels for transferring shear forces in expansion joints are ready for installation and dispense with the need for complex detailed solutions. This shear reinforcement is affordable, reliable and intelligent.
The Schöck Bole® is a anti-punching shear system that offers specifiers the advantages of a free floor area. Non-load bearing partition walls are possible, lower noise and reinforcement expenditure, Bole allows room to work freely right up to the ceiling and full use of storey height.
For decades, steel has been the material of choice for reinforcement in concrete construction. But in particularly corrosive surroundings or construction that must be executed without steel, conventional steel rebar does not satisfy the relevant requirements. This is where Schöck Combar® glass fibre reinforcement offers all sorts of options.
Schöck customer support offer a totally comprehensive information service which includes: software, planning, in-house training, seminars and comprehensive technical specification details.
Further technical information is available to download from the BPi download Libraries or from the manufaccturer’s own website.
These files are provided by the manufacturer. While Building Products Index takes every care to ensure the information is correct and up to date, we cannot be held liable for any out of date or incorrect information in them. Please check with the supplier before specifying or purchasing products.
1 - Schöck Product Catalogue
Published [20/11/17]File size [4358 KB]
2. Schöck Thermal Bridging Specifiers Handbook
Thermal Bridging Connectors, Thermal Breaks, Balcony Connectors
Published [20/11/17]File size [1567 KB]
3. Schöck Isokorb Type AXT for Parapets Brochure
Thermal Insulation for concrete parapets
Published [20/11/17]File size [304 KB]
4. Schöck Dorn Brochure
Published [20/11/17]File size [732 KB]
5. Schöck Bole Brochure
punching shear reinforcement
Published [20/11/17]File size [312 KB]
6 - OISD Type KS Connectors
Thermal Bridging Connectors, Thermal Breaks
Published [02/11/15]File size [955 KB]
7 - OISD Type K Connectors
Thermal Bridging Connectors, Thermal Breaks
Published [02/11/15]File size [1465 KB]
8 - OISD Type KST Connectors
Thermal Bridging Connectors, Thermal Breaks
Published [02/11/15]File size [1432 KB]
Schöck ComBAR Ribbed Reinforcing Bar
Reinforce safely without steel. Reinforcement bars in projects where the use of a TBM Tunnel Boring Machine is planned.
Published [20/11/17]File size [1235 KB]
Schöck Dowel Type SLD Brochure
Shear load connectors Schöck Dowel Type SLD
Published [01/09/15]File size [853 KB]
Schöck Image Brochure
thermal and sound-insulation solutions
Published [20/11/17]File size [3634 KB]
Schöck Isokorb New Generation
isokorb thermal bridging
Published [20/11/17]File size [463 KB]
Schöck New Generation Isokorb XT
Insulating to highest standard.
Published [06/01/17]File size [467 KB]
Schöck Novomur Technical Information
Published [20/11/17]File size [1917 KB]
Schöck Thermoanker Brochure
Published [20/11/17]File size [371 KB]
Schöck’s thermal break innovation for Parapet Walls benefits architects & developers
The innovative Schöck Isokorb type AXT structural thermal break is verifiably a more thermally efficient alternative to wrapped parapets, offers a number of additional benefits to architects and developers – and saves on construction costs.
As with balconies, continuous parapets are prone to the problems of thermal bridging, because energy is transferred through the thermal barrier. The conventional method of insulating parapets is to wrap the perimeter of the wall with an insulation barrier and, by wrapping the parapet it becomes part of the heated building mass. However, the Schöck Isokorb type AXT provides a more thermally efficient and cost-effective alternative. If a parapet is thermally separated at ceiling level, it sits outside the heated building mass and with its insulation thickness of 120mm, achieves low psi values and a significant reduction in heat loss. Its performance is also certified as suitable for Passive House design, therefore satisfying the most stringent energy standards.
Although the heat outflow is reduced when a parapet is wrapped, the loss of energy is still several times higher than when a Schöck Isokorb type AXT thermal break is incorporated. The two diagrams demonstrate: (Fig 1A) the heat loss from a parapet with insulation wrapped along its entire length; and (Fig 1B) a parapet using an Isokorb AXT thermal break. The colour gradient illustrates the temperatures in the component, showing how the heat flows from the warm (red) area to the cold (blue) area. Clearly the parapet connection insulation along the circumference (Fig 1A) suffers high heat energy loss through the parapet, which causes low interior surface temperatures. In contrast, using the thermal break (Fig 1B), barely any thermal energy escapes through the load-bearing thermal insulation element.
The reasons for this
By wrapping a parapet, it becomes part of the heated building mass. However, if a parapet is thermally separated at ceiling level, it sits outside of the heated building mass. An added advantage of using the Isokorb is that it structurally connects only at specific points where structurally required. The areas in-between being designed as an uninterrupted insulating plane. In such cases, the parapet is not heated and therefore the loss of energy is significantly reduced.
This is demonstrated in the heat loss comparison chart. With the conventional method, when compared with the Isokorb type AXT, the reduction so significant that the solution is certified as suitable for Passive House design, meeting the most stringent energy standards.
Other functional advantages
Wrapped components are similar in principle to an insulated flat roof, with many of the associated problems. They are prone to damage and almost inevitable repair and maintenance outlay. Particularly where railings or covers pierce the insulating layer. With thermally separated parapets however, railings and covers can be attached directly into the concrete. A significant point too, is that because there is no thermal insulation on the internal surface, useable terrace area is released which can enhance the value of the property. There are a number of other functional advantages when incorporating the Isokorb type AXT and in addition it permits a more sophisticated construction opportunity for greater freedom of design.
Other key factors are that there is no risk of any additional thermal bridging through balustrade fixings and the AXT solution is both durable and water impermeable. Therefore, it does not require maintenance and there is no risk of expensive restoration due to waterproofing problems.
Independent Cost Comparison
Recently, an independent cost comparison was undertaken, involving two 12.5m long parapet constructions. A conventional parapet construction detail and a second detail incorporating the Schöck Isokorb type AXT with a spacing of 1.25m. (See the detailing comparisons below). This demonstrated that in construction cost terms alone, depending on the structure, the Schöck alternative comfortably achieved savings of up to 10%. The reason for this is, the Isokorb AXT allows simplification of the formwork process, as well as the detailing of the rear of the parapet. In arriving at the financial comparisons, the independent surveyors priced each element with reference to Spon’s Architects and Builders Price Book. Appropriate adjustments were made for inner London costs and inflation at the time of publication.
The detailing is shown here:
For complete reassurance, the Isokorb type AXT is assessed as a ‘Certified Passive House Component’, provides BBA Certification, LABC Registration and NHBC approval and meets full compliance with the relevant UK building regulations. The temperature factor used to indicate condensation risk for occupants in residential or commercial buildings – the (fRsi) value that must be equal to, or greater than 0.75 or 0.50 respectively – is comfortably met by incorporating the Isokorb. In addition, there is also compliance with the Government Standard Assessment Procedure, SAP 2012, concerning CO2 emissions from buildings and respectively heat losses through non-repeating thermal bridges.
For a free copy of the new Schöck AXT Parapets Brochure – contact the company on 01865 290 890 or visit www.schoeck.co.uk
Schöck makes thermally efficient balcony retro-fit a reality
The debate over the environmental, sociological and financial pros and cons of demolishing or renovating older housing stock will undoubtedly continue. However, increasingly it appears renovation and refurbishment will remain the most significant contributors to progress in terms of energy efficiency and environmental preference. There is now a huge variety of thermally efficient insulation solutions for old building renovation and the overall effect of modern exterior insulation technologies, along with the appropriate render, can improve the character of even the most unremarkable of buildings. Add to this superior fenestration technology; floor and roofing insulation; plus the numerous modern technologies for cavity fill. Until recently, buildings which have to be insulated from the inside – possibly listed, or where facades are an aesthetic feature – have used a substantial thickness of insulation to achieve effective thermal performance. As a result, the usable interior space was eroded, but now, with the development of significantly thinner insulating materials, this has changed beneficially for the building occupants. These and many other contributing products and technologies, have resulted in extremely thermally efficient renovated buildings.
Crucially, thermal bridging must be minimised
However, in line with the general advance of thermal efficiency improvements in renovated buildings, it is vital that due consideration is given to the methods of installing balconies onto such structures. The retro-fitting of balconies, or the replacement of old thermally inefficient balconies is in demand. They are an anticipated add-on for contemporary living accommodation, especially in city centres, where the value of the property is likely to be enhanced and the subsequent return on investment improved.
Crucially, thermal bridging must be minimised. Low surface temperatures at the thermal bridges, combined with the relatively high air humidity resulting from the newly sealed building envelope, will result in energy loss and condensation. This in turn can lead to structural integrity problems with absorbent materials. Worse still, it encourages mould growth, which has serious implications for building occupants and may cause them to develop certain medical conditions such as respiratory problems and dermatitis.
This is highlighted through research at the Oxford Institute for Sustainable Development (OISD) at Oxford Brookes University. It shows that with airtightness and fabric U-values being increasingly improved in UK building, thermal bridge heat losses are responsible for an increasing percentage of the overall building heat loss. It is common for thermal bridges to account for 20% - 30% heat loss in multi-residential units (as calculated by thermal modelling) and balcony connections can be a major contributor to the thermal bridge heat loss if effective thermal isolation is not included in the design.
A solution with verifiable performance standards
A dedicated solution from Schöck offering verifiable energy efficient balcony renovation and refurbishment is the Isokorb type R – a ready-to-install component which allows residents to remain in the building during external renovation, with no damage risk to internal finishes and decoration.
The installation method is that drill holes are first marked with a template in position on the face of the building. Holes are then drilled into the concrete slab, adhesive injected and the type R load-bearing reinforcing rods slipped into position and anchored by means of the pre-injected adhesive. Structural screed is poured into a special pocket between the type R and the concrete slab to ensure a perfect contact between the two structural elements. Once both the mortar and the screed are cured the structure is ready for the new balcony to be connected
There are two main variants of the type R. The first is the Isokorb type RK, a load-bearing thermal insulation element for cantilever balconies with a reinforced concrete slab, or supported pre-cast concrete slab balconies. The second being the Isokorb type RKS, designed to minimise thermal bridges at concrete-to-steel connections during renovation. As a load bearing thermal insulation element, the Schöck Isokorb type RKS transfers negative moments and positive shear forces, allowing enormous scope for design.
Unlike new-build, product selection for renovation is subject to certain restrictions. The solution will very much depend on the specific project requirements, the existing building and its structure, as well as the development of customised design proposals. The Schöck design team is on hand to provide extensive technical support on all these issues, for architects, developers, support structure specialists and contractors. This includes product selection advice for the different options; building physics detail; framework conditions; methods for undertaking a building inventory; dimensioning examples and a comprehensive checklist.