Transforming facades with silicone technology

An external wall insulation system is a thermally insulated, protective, decorative cladding procedure involving the use of an insulating material and a render finish. The most common insulating material is polystyrene, others such as mineral wool, polyurethane foam of phenolic foam may be used. The render finish usually consists of a reinforced base coat followed by a decorative mineral or synthetic finish.

The K Rend Silicone Thin Coat range is particularly suitable where lightweight render systems are required, such as an external wall insulation system (illustrated right).

K Rend Silicone Thin Coat products are available in an extensive colour range using the NCS System which helps customers visualise special colours for their project. NCS – Natural Colour System is a logical colour notation system which builds on how humans see colour.

K Rend Silicone TC 15 render holds the prestigious BBA certification, assuring you that vital product safety and performance requirements are met.

Benefits of Using External Wall Insulation:

  • Reduces heating bills by reducing heat loss through walls
  • Thermal efficiency of walls can be increased by up to 85%
  • Help to save the environment by reducing carbon emissions (as you burn less fossil fuel)
  • Reduce condensation (EWI raises temperature of internal walls)
  • Prevent damp & mould: EWI seals buildings from the elements
  • Improve acoustics: hi-density insulation reduces sound transfer
Contact our Technical Support Centre on 028 2826 0766 or email Sales@K-Rend.co.uk
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NEW to the UK market – the E-valve by Sainte Lizaigne

A remote water management tool operated via a smartphone app.

Groundbreaker Systems is delighted to announce that the company can now offer the NEW E-valve by French manufacturing giant Sainte Lizaigne.

This fully remote controllable system is ideal for water network management, opening possibilities for off peak water supply, and sale of water to remote locations by time or volume.

With scheduled maintenance and access to historical data the E- valve can add to BREEAM scores by water management.

Operated via smart phone app connected to the valve via Bluetooth low energy, the benefits for water operators and consumers are far reaching.

Remote billing facilities are invaluable to avoid waste of water resources such as after-hours management of water to “non domestic” properties such as office blocks, schools, supermarkets, Holiday Parks or remote locations, and where action can be taken remotely without incurring travel time and costs. Ideal for high value locations with poor access, examples of which are airports or shopping malls. The E-valve also enables the sale of water by volume via credit card or account payments.

The E –valve facilitates efficient use of resources with no fuss to the consumer, is easy to install on existing or new water services; in addition the E-valve is alarmed for unspecified use, leakage identification and damage limitation.

E-valve is available in the UK exclusively though Groundbreaker Systems.

Please call 01379 741993, email sales@groundbreaker.co.uk or visit www.groundbreaker.co.uk for more information.
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GRP or polycarbonate rooflights for industrial buildings?

Will you see the light?

Since the late 1950’s GRP has been a feature of many commercial, industrial and agricultural buildings across the UK, bringing the free resource of natural daylight into the workplace.
GRP is a strong thermoset material with good impact resistance and consists of, among other components, polyester resin which is reinforced by a glass strand mat.

The success of Filon rooflights resulted in several UK based manufacturers continuously producing GRP. Eventually, this involved the use of alternative plastic materials such as PVC. As a brittle material, this was at times subject to damage due to storms, foot traffic on the roof and UV degradation.

This didn’t stop the efforts of thermoplastic manufacturers to try to compete with ‘Filons’ and other GRP rooflights though and polycarbonate in-plane rooflights were born and have since steadily encroached on the GRP rooflight market. There are many positive attributes to polycarbonate such as it providing high levels of light transmission, being very strong and having a good fire rating. There are however, many aspects that should be considered in rooflight material choice for profiled roof applications and we shall discuss them now.

Thermal movement

A thermoplastic material such as polycarbonate has much greater thermal movement than GRP and over 5 times more than the surrounding steel sheets.

If no allowance has been made for this movement such as oversized fixing holes, it could create some problems particularly around the fasteners such as the sheet cracking and at the end laps with seals potentially failing. It is also possible for rooflights with an insulating box detail, such as those used in composite panel roofs, for the rooflight to expand but find resistance. The material will have no room to move as it will be constrained by the surrounding metal roof panels and so could belly out – bulge out of shape between the purlins.

Light Distribution

Another significant consideration is the type of illumination required in the building. GRP has high levels of light transmission and is also a naturally diffusing product. It will provide an even distribution of natural daylight across the area to create a balanced illumination reducing bright spots, shadows and hot spots.

Thermoplastics like polycarbonate, when used as in-plane rooflights however, tend to be clear or colour tinted. They are much less diffusing and allow more light to pass directly through the rooflight. This can create localised bright spots with solar glare and also hotspots due to the nature of direct sunlight.

The first images show two very similarly constructed equestrian centres but one is fitted with polycarbonate rooflights and the other with Filon GRP rooflights. The images clearly show a very different lighting pattern: the polycarbonate rooflights allow light to pass directly through so that their position is clearly replicated on the floor – even the purlins are casting shadows on the ground; the GRP rooflights in comparison provide a very even light distribution, so much so that there are not even any shadows visible around the horse and rider – the perfect conditions for easily spooked horses.

The second pair of photographs show a supermarket distribution centre, firstly with polycarbonate rooflights and secondly after the rooflights have been replaced with Filon GRP. Again, in the first picture, the position of the rooflights is clearly visible by the bright spots on the floor. The picture with new GRP rooflights has eliminated all of the bright spots and reduced localised internal temperatures without compromising lux levels – much more suitable conditions for storing some supermarket goods and foodstuffs.

The example projects highlight the importance of selecting the appropriate rooflight material. For your next industrial, commercial or agricultural building, please give careful consideration about the type of light distribution required. If an even spread of diffused light, without shafts of light, hotspots or dark corners is preferred, then GRP is likely to be the most appropriate choice.

Written by Mark Wilcox, Sales Director, Filon Products Ltd
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Refurb proves best for Fife flats transformation

When Fife Council consulted its residents at Broomhead flats in Dunfermline about the future of their homes, the options were pretty clear cut. The three 50-year old blocks of flats had reached the point where they either needed significant investment to bring them up to the current Scottish Housing Quality Standard, or needed to be demolished and replaced with new build properties.

The result of the residents’ consultation favoured refurbishment and, in May 2014, Fife Council’s Housing and Communities Committee gave the go-ahead for this project to begin. A key requirement was to deliver refurbished homes which offer a higher level of protection against fuel poverty.

The multimillion pound project has transformed 216 properties, housed within the three 12-storey blocks. The building fabric has been brought up to a higher thermal standard, utilising product technology which was simply not available in the 1960s. And that primarily involved the £5.1m contract with CMS Window Systems for the replacement of windows, doors and curtain walling, application of external wall insulation (EWI) and replacing balconies.

CMS was appointed as the main envelope contractor after winning the competitive cost and quality based tender. For Fife Council, this helped simplify the procurement process and supply chain from the outset. CMS was able to help develop a specification for the windows, and their appointment ensured consistent quality, trouble free interface integration and clear communication channels – all proving important to the success of this extensive refurbishment project.

Every flat benefits from A-rated, highly insulating windows which are manufactured with Sheerframe lead-free PVCu profiles and feature thermally superior low-e softcoat double glazed sealed units. With a low U-value, the energy rating (WER) of these fully UK-made windows represents a huge improvement in thermal performance.

CMS also manufactured and installed aluminium curtain walling which spans up to eleven floors on each block, enclosing all communal walkways – equating to more than 2,000m2 of curtain walling. This replaced existing steel balustrades and steel screens in communal areas to raise the quality and visual appeal, internally and externally.

A third component to the structural elements was the replacement of balcony enclosures. CMS installed more than 1,700m2 of enclosures created using Windoor System 1000 featuring ‘Light’ glazing systems. Their design gives tenants the freedom to use their balconies all year round.

Completing the transformation of the building fabric, CMS also over-clad the external walls with a mix of insulated render and render only, as required, using mast climbers for safe access and to ensure speedy delivery with minimum disruption. With total wall coverage of more than 11,000m2, this extensive over-cladding work has improved the insulation level of all walls to complement the performance of the windows, doors and curtain walling.

John Rodigan, Senior Manager of Building Services at Fife Council said: “The Housing and Neighbourhood Service of the Council demonstrated great foresight in their decision to invest in the energy efficient measures at Broomhead.

“It’s also no coincidence that one of our most environmentally committed companies won the contract, it’s been the perfect partnership with all stakeholders sharing the same objectives. The result for the Broomhead tenants will be significant in terms of reduced energy costs and increased comfort. These works have made a substantial contribution to Fife’s green agenda as well as supporting local employment and trade apprenticeships – the delivery of this project has been a real triumph for the Council.”

Find out more at www.cmswindows.com.
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Sika provides long-lasting solution to long-standing 
college roof drainage problem

The exceptional waterproofing and durability properties of Sika-Trocal single ply roofing membrane has proved its worth on a highly challenging project to refurbish a number of roofs at a busy college campus.

MidKent College is one of the largest further education and training providers in the South East with an estimated 8,500 students enrolled at its Maidstone and Medway-based campuses. The roofs on five buildings at its Maidstone campus, housing classrooms, workshops, kitchens, TV studios and staff rooms had reached a state of disrepair due to wear and tear.

With water ponding on the roofs, leading to water ingress, a solution was required. Sika-Trocal S provided the solution. A total of 4,200m2 of 2mm thick Sika-Trocal S was specified by contractor K&S Construction for the project which was carried out during term-time and with minimum disruption to buildings on site.

The application of Sika-Trocal S was designed to minimise the standing water risk and ensure correct falls towards appropriate outlets and hoppers. This was achieved by over-roofing existing roofs consisting of a number of different bases including felt and asphalt.

Sika-Trocal’s vapour permeable membrane was mechanically fastened at the perimeters and around penetrations using the product’s innovative laminated metal disc system. This system sees the membrane fixed to the roof in a single process, ensuring a fast installation, minimising components required and reducing overall project costs. A 120mm thick, high performance rigid thermoset insulation was also applied to improve the thermal efficiency of the buildings. 

Stuart Marris, Manager at K&S Construction commented: “The MidKent College project is one of the biggest in the firm’s history so it was imperative we specified the most reliable product for the job. Because Sika-Trocal S is amazingly versatile and easy to apply it meant we could carry out the work with little disruption and without the need for people to move out of the building.

“Of its many outstanding features, Sika Trocal’s reliability scores most highly with us.

It is vapour permeable so if there is any water trapped in the system it is possible to over-roof the building without having to worry about things such as condensation.”

Offering exceptional waterproofing, durability and a simple installation process, the cold-applied Type S roofing membrane from Sika-Trocal is approved by the British Board of Agrément (BBA) to have a life expectancy of up to 30 years. As well as providing a single, comprehensive solution to the roofs’ drainage issue, it has brought a pleasing, aesthetic uniformity to the campus buildings. 

Combined with an efficient installation that ensures an improved seal, the Type S waterproofing membrane delivers excellent performance and will provide buildings at MidKent College with safe, reliable all-weather protection for many years to come.

For more information please visit http://gbr.sika.com/.
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Ibstock showcases innovative special shapes range in new brochure

Ibstock, the UK’s largest brick maker, has launched the latest edition of its Ibstock-Kevington Special Shapes brochure, exhibiting its extensive range of specially designed bricks and solutions for creating stand-out designs and speeding up builds every day.

IBSTOCK

The magazine showcases the popular Ibstock-Kevington range of products for delivering stunning architectural visual effects and a ‘special’ edge to projects from either manufactured or cut and bonded brick shapes. Readers of the brochure will discover the endless design possibilities achievable through a combination of technical information and diagrams, and high resolution photography.

The products displayed in the new brochure include bullnose bricks; used for creating vertical and horizontal curves, spiral bricks; a completely unique design which uses a simple shape to create a complex and intricate finished result and Caplock; a capping and coping system that resists vandalism and improves the durability of the wall.

Andrew Halstead-Smith, Group Marketing Manager at Ibstock, says: “The new Special Shapes brochure not only makes the selection process easy, but delivers real design inspiration to support creativity across the industry. While brick has, for centuries, provided the traditional cladding for the UK’s buildings, its ability to move with the times and embrace changing trends and styles means it remains the construction material of choice. This brochure allows tradespeople to make informed decisions on how to meet the aesthetic and structural requirements of a building.

“The new brochure also outlines the CAD services available from Ibstock to ensure products fit bespoke specifications from customers.”

Available free of charge, the 2016 Special Shapes brochure can be ordered through the Ibstock Samples and Literature Hotline on 0844 800 4578 or visit the website at www.ibstock.com/literature.
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Rinnai: a gas-fired range of space heaters

Rinnai’s Energysaver range of fanned convection powered flue gas-fired space heaters are designed specifically for use in schools, community centres, libraries, conservatories and churches and other large spaces, where they have earned themselves great popularity with end-users and installers.

Now, with a new super energy efficient addition to the range in the form of the Rinnai Energysaver 559FT with sleek good looks, and a matching new streamlined look for the popular Energysaver 309FT, Rinnai is leading the field in large interior space convector heating.

Sporting a modern, sleek casing, the heaters simply blend into the background in line with modern demands for modern interior aesthetics while offering exceptionally high efficiencies in operation and reduced running costs.

Changes have been made to the operation board which is now an easy to use touch control pad sited conveniently and discreetly on top of the appliance, (rather than on the front with a flip up cover). The unit is also supplied with a child lock to eliminate any problem of small hands tampering with the controls.

Added to these advantages are the timer function and eco mode which are combined with the new unit’s ability to heat spaces fast.

The 559FT has an input of 6.4kW and output of 5.2kW. The streamlined unit measures 554mm x 750mm x 250mm.

The Rinnai Energysaver 309FT, like the 559FT, sports a similar sleek casing and turns in net efficiencies of 88%.

It has an input of 3.4kW and output of 2.92kW. The streamlined unit measures 695mm x 465mm x 257mm. Natural Gas usage has been pegged at 0.31m3 while LPG consumption is 0.26kg/hr.

Also available is the Energysaver 1004T with its impressive input of 11.6kW and outputs 10.23kW. Its measurements are 670mm x 930mm x 315mm and it has energy efficiencies of 96% under the guidance of Part L 2014. This puts it in the top rank of space heaters in its class.

Like the Energysaver 559FT and 309FT, the 1004T heater is also suitable for central timer control. This feature allows the building manager to run any number of Rinnai space heaters off a central time clock providing heat to the largest of spaces. The Energysaver Multi controller is not limited to single Energysavers as the flexibility of the system guarantees units can be mixed and matched to satisfy even the most unique of buildings.

Rinnai Energysaver range delivers energy-efficient and consistent warm air powered by Natural Gas and LPG options and is built with fully modulating burners so heat output and energy input is reduced as the space warms up.

The Rinnai Energysaver range comprises fanned convection-powered flue models that exceed seasonal thermal heating guidance under Building Regs Part L.

In a building with high vaulted ceilings, with conventional convector heaters the heat will immediately rise to the ceiling. With the Energysaver range Rinnai has successfully come up with a solution that heats from the floor up and by modulating gas usage in relation to room temperature, provides unparalleled levels of comfort combined with efficiency.

For more information on the RINNAI product range visit www.rinnaiuk.com.
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Clark-Drain adds Road Gully to underground range

Drainage product and access cover leader, Clark-Drain, has added a choice of Road Gullies certified to the Highways Authority Product Approval Scheme (HAPAS) to strengthen its underground range.

The Gullies are designed for quick and easy installation, in urban areas and on roads, for direct connection to PVC-U plastic pipe systems or with a suitable adaptor, also supplied, to clay and twin wall drainage systems. The gully outlet is 160mm diameter as standard with 178mm diameter available when using the outlet adaptor.

Manufactured from High Density Polyethylene the Gullies will be sold alongside Clark-Drain’s Ductile Iron Gully Grates which are BSI Kitemark Certified to BS EN124:1994 for a D400 (40 tonnes) load rating.

Dave Westacott, National Sales Manager at Clark-Drain says: “The addition of the Road Gullies supports the tendency in new installations to use plastic gully pots instead of pre-cast concrete. They are easier to handle, require less people and no heavy lifting equipment, resulting in cost savings. The plastic gullies also have a similar lifespan to pre-cast concrete when installed with a concrete surround.”

The practical design of the road gullies will also support the maintenance regimes of Local Authorities and their responsibilities for odour control.

Dave continues. “When used as a trapped system the gullies are airtight to prevent smells rising up from the existing sewers. This is mandatory for connections made to a Foul or Combined system, and is recommended for connections to Surface Water systems. It is also easy to maintain with a removable rubber plug that enables the gully to be rodded or cleaned using conventional equipment and machinery to clear debris from the drainage channels. The gullies have also been tested under HAPAS requirements to be fully watertight”

The Road Gullies have a clear opening of 450mm and will be offered in two depth sizes to 750mm and 900mm depth with water holding capacities of 83 litres and 107 litres volume respectively.

For more information please visit www.clark-drain.com/products/underground/no-series/686/

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Welsh Slate is trusted to help deliver a medieval facelift

Roofing, walling and flooring from Welsh Slate feature on the redeveloped cardigan castle.

A three-pronged helping hand from Welsh Slate has contributed towards giving a medieval castle a new lease of life.

The manufacturer’s roof slates, walling and floor tiles feature on multiple aspects of the £12.5 million redevelopment of Cardigan Castle which had been in danger of being lost to the nation forever.

Penrhyn Heather Blue slates from Welsh Slate’s quarry at Bethesda have been used to re-roof Castle Green House, Ty Castell and The Stables while 200m2 of dark blue grey cleaved walling from the company’s Cwt-y-Bugail quarry clads the interior and exterior walls of “1176” – a new 70-cover contemporary restaurant which cantilevers over the castle walls.

Here the coursed walling is complemented by Welsh Slate’s Cwt-y-Bugail Dark Blue Grey floor tiles which are echoed in a total of nine new bathrooms in the East Wing guest accommodation and Green Street Cottages visitor centre. The new Welsh Slate flooring was laid by main contractor Andrew Scott of Port Talbot.

The Welsh Slate materials were specified by Purcell architects who worked for 10 years to repair and regenerate the 13th Century site, albeit with a few modern money-making twists.
Project architect Izaak Hudson said: “Cardigan Castle is one of the most significant historic building projects recently completed in Wales and all of the project team were very keen to be able to use local materials where we could.

“We specified Welsh Slate to match the existing slate on site, with WEFO*1 funding targeted at Welsh materials and contractors, but also because it was historically appropriate and good quality.”

“Castle Green House, the main dwelling within the castle walls, has a large-format, wet-laid diminishing course roof. This was expertly re-laid by skilled roofers from Tree and Sons of Milford Haven. The wet laying took some time as due to the weight of the huge Penrhyn slates we had to wait for the lime mortar of lower courses to carbonate before laying more, but it was a key existing feature and Cadw were very keen to reinstate it.”

Home to the first recorded Eisteddfod in 1176 (hence the restaurant’s name), the castle was partly dismantled by Cromwell’s forces after the Civil War, then enjoyed a brief renaissance in the early 19th Century as a Romantic site for a new mansion.

By the end of the 20th Century the site was derelict and ruinous, its buildings collapsing and roofs open to the weather. Most noticeably, the castle curtain walls were propped up with great raking shores to prevent their collapse onto the town’s main road.

This was despite the castle’s designation as a Scheduled Ancient Monument and the six buildings within its walls being listed Grade II or Grade II*. So under public pressure, Ceredigion County Council acquired the site from the elderly owner while a group of local people set up the Cadwgan Trust to help.

Purcell architects were commissioned in 2005 to carry out an options appraisal to identify future potential uses which were agreed as heritage interpretation, a restaurant, holiday accommodation, restored gardens and space for open air events.

Phase I of its redevelopment was the £1 million repair of the castle’s curtain walls; Phase II was the conservation and upgrading of the six buildings within the castle walls and restoration of the Regency gardens.

The conservation works covered all aspects of traditional building skills, ranging from structural carpentry repairs, to slate roofing, leadwork, masonry repairs, external joinery repairs and lime rendering.

Purcell carried out careful research, along with trials and testing of materials and finishes, to inform its conservation decisions and ensure the building would be an exemplar for innovative conservation practice.

The project brief required new accommodation to house the restaurant and catering facilities and the decision was taken to locate the new building above a section of the castle walls which had collapsed in the 1970s.

The position provides views across the Teifi quayside and the river below and inwards across the castle Regency gardens. Purcell’s design cantilevers out above the castle walls, its strong visual presence indicating to visitors there is something special inside.

The new restaurant is uncompromisingly contemporary with large glazed elevations taking advantage of the views and giving it a transparency which helps minimise its impact on the site. Where solid, the external and internal walls were constructed of coursed Welsh Slate laid by Coe Stone of Carmarthen, specialist stonemasons concentrating on the conservation and repair of historic buildings and monuments, echoing the Cilgerran slate garden walls that form the backdrop to the site.

“It was a very challenging and interesting project and we learned a lot about slate,” said Izaak.

*1The Welsh Government organisation distributing funds from the European Union for economic and social development.

For more information please visit www.welshslate.com.
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SMARTGLASS Dynamic – Innovative Glazing Solutions for Offices & Residential Homes

SMARTGLASS Dynamic, powered by SageGlass is a new glazing technology which has been hailed as a revelation. SMARTGLASS allows you to switch from clear glass through three progressively darker tints, giving you more control over both heat and light levels – all in a matter of minutes. The various shades of blue tint help to reduce glare and allow for a relaxed environment, no matter what the weather is doing outside.

Developed in the US and only recently arriving on UK shores, SMARTGLASS is currently available for residential homes via a range of lantern roofs, with full conservatory and bi-folding door products due to be available at a later date. SMARTGLASS is also ideal for offices and commercial buildings, especially where meetings take place and where screens suffer from glare.

SMARTGLASS offers three basic tint levels. The clear state is indistinguishable from normal glass and will let the same amount of light into the property. This tint level is ideal for darker winter days and for when a lot of light is required.

The full tint, at the opposite end of the scale, blocks 96% of the sun’s rays and reduces light transmission to just 1%. This full tint stage is ideal for very bright summer days, or where glare is a problem when reading or using technology. The blue hue creates a calming and relaxed space.

There is also a choice of intermediate states which allow you to tailor the perfect amount of incoming light. The glazing is tinted via a switch, which allows you to fully customise the light levels to best suit your needs.

SMARTGLASS Dynamic, powered by SageGlass works in a very simple and effective way. The glass itself is covered with layers of electrochromic coating. This is practically invisible to the naked eye and when in the clear state, this glass will simply look like ‘normal’ glazing. The layers of coating control the tint levels by allowing the lithium ions and electrons to travel through the layers when a low voltage is applied. When the ions and electrons are all transported to one layer of the coating, a dark tint is observed. As soon as the voltage polarity is reversed, the ions and electrons will travel back to their respective layers and the glass appears clear.

The voltage required is low (less than 5V DC) and is easy to install; just a simple wire through the frame is required. As mentioned above, SMARTGLASS is initially available in a range of roof lanterns. Five size options are available:

SMARTGLASS-Dynamic

Further information can be requested from Evander – one of the leading property services companies in the UK.
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