Posts

Kingspan takes the devil out of detailing

Kingspan Insulation has released a new technical bulletin and RIBA approved CPD article, designed to support enhanced detailing. The documents explore the effects of linear thermal bridging around openings in the building envelope, and present new research on the subject, allowing specifiers to use Kingspan Kooltherm Cavity Closer as a premium performance, one-size-fits-most solution.

The CPD article and technical bulletin are based on a thermal modelling study of jamb details by BRE Scotland. The study covers a variety of cavity wall constructions closed using Kingspan Kooltherm Cavity Closer. The calculated ψ–values within the study are considerably better than those given in the SAP Table K1 “Approved” column (which reflect the values given in “Accredited Construction Details”) and, in the BRE’s opinion, are equally applicable to the equivalent sill details.

Importantly, the resulting ψ–values can also be used as a “safe approximation”, for frame depths and overlaps (between the frame and Kingspan Kooltherm Cavity Closer) for a broad range of constructions. This makes it simpler for designers to specify enhanced detailing around openings in the building envelope.

To quantify the level of improvement, Kingspan Insulation goes on to compare the transmission heat transfer coefficient (HTB) calculated using the “safe approximation” ψ–values from Table 1 with that calculated using jamb and sill ψ–values from the SAP Table K1 “Approved” column, for four different dwellings. The HTB calculated using the “safe approximation” ψ–values is significantly better (up to 13% better) than that calculated using ψ–values from the SAP Table K1 “Approved” column.

The accredited CPD article is worth double points to RIBA Chartered Architects and can be accessed from the RIBA CPD website. Alternatively, the full technical bulletin – including the safe approximation ψ–values and relevant constructions – can be downloaded directly from www.kingspaninsulation.co.uk/psidetails
/0 Comments/by

Kingspan Insulated Panels achieves BES 6001

Kingspan Insulated Panels’ continual commitment to responsible business practices has been recognised with the achievement of BES 6001: Responsible Sourcing of Construction Products certification.

Developed by BRE Global, the standard provides an exacting framework of issues manufacturers must address to ensure responsible sourcing of construction materials. This includes organisational governance and supply chain management, in addition to environmental and social elements.

All wall and roof panels manufactured at Kingspan Insulated Panels’ Holywell and Sherburn manufacturing facilities have been certified to BES 6001 ‘Very Good’, with particular success in the Greenhouse Gas and Resource Use categories of the scoring table. This provides clear assurance that the products are constructed from raw materials which meet the highest levels of responsible sourcing practice. Additionally, the BES 6001 certification means that the Kingspan Insulated Panels products can also contribute towards the award of credits within BREEAM assessments.

Phil Smith, Managing Director at Kingspan Insulated Panels, commented on the achievement “It is becoming increasingly important for businesses to be able to demonstrate responsible practice in all aspects of their work. We are immensely proud to see our products meet the BES 6001 standard and, using the feedback from the process, we are looking forward to further develop our approach.”

For further information, please visit www.kingspanpanels.co.uk.
/0 Comments/by

Kingspan Kooltherm K100 range expands

Kingspan Insulation has announced the launch of two new products to join their innovative new Kooltherm K100 Range, designed to deliver lower U-values with a minimal construction thickness.

Kingspan Kooltherm K112 Framing Board and K107 Pitched Roof Board are the latest products in the range, which was launched last year. Their advanced, fibre-free insulation core has a thermal conductivity of just 0.018 W/m.K across all available board thicknesses, the lowest for any rigid phenolic insulation board. This revolutionary composition offers architects, specifiers and builders the freedom to design and construct buildings with inherently outstanding fabric performance, without having to compromise on internal space.

All the products in the Kooltherm K100 Range are manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and very low Global Warming Potential (GWP). The insulation boards are non-deleterious, easy to handle and install, and are unaffected by air infiltration.

Kooltherm, Therma and KoolDuct insulation products and cavity closers manufactured at Kingspan Insulation’s facilities in Pembridge and Selby are certified to BES 6001 (Framework Standard for the Responsible Sourcing of Construction Products) ‘Excellent’.

The Kingspan Kooltherm K100 Range is now available on the Kingspan Insulation U-value Calculator, and detailed product brochures are available for download www.kingspaninsulation.co.uk.

/0 Comments/by

webertherm EWI by Saint-Gobain Weber slashes U-values for Gwynedd properties

External Wall Insulation by Saint-Gobain Weber has been specified for the thermal upgrade of social housing properties in Bangor and Y Bala, North Wales. They have been transformed with the application of the innovative webertherm XP External Wall Insulation (EWI) with u-values that have been dramatically reduced while the aesthetics of the properties have been changed completely. Residents are praising these improvements, one reporting that their heating thermostat has been turned down to half its normal setting.

The properties, a combination of houses, bungalows and apartment buildings, are owned by Cartrefi Cymunedol Gwynedd, the largest housing association in North Wales. CCG was set up in 2010 to provide good quality, affordable homes and services, as an independent not-for-profit organisation which is registered and regulated by the Welsh Government. CCG has around 6,300 homes and is responsible for their maintenance and management.

Achieving Welsh Housing Quality Standard, in which social landlords are required to improve, meet and maintain their housing stock to an acceptable level before, or no later than, 2020 is an important part of CCG’s work. A total of £136million has been committed to improving homes to meet the needs of existing and future residents since the organisation’s inception.

The houses in Britannia Square, Bangor, are post-war, system-built, non-traditional Unity Structures designed with storey-level precast reinforced panels, metal braced from within the cavity, and poorly insulated offering little thermal performance. In Y Bala the homes are of 1960s non-trad Trusteel frame construction with similar thermal deficiencies. While upgrading properties, Weber’s EWI extends the life of existing buildings, particularly hard-to-treat properties, by keeping the old structure warm and stable.

CCG awarded the main contract to Willmott Dixon’s Conway office who in turn appointed specialist EWI contractor R W Hough & Sons of Flintshire to apply the BBA certificated webertherm XP EWI system with webertherm M1 render. Martin Hough rates the Weber system highly: “The webertherm XP system is a very good product. We have experienced no problems at all with these materials that offer speed and simplicity while protecting tired facades and minimising heat loss.”

Challenging u-value improvements for Britannia and Bala homes were calculated by Weber: properties at Britannia Square, Bangor were slashed from 1.42W/m²K down to 0.28W/m²K whilst an even more dramatic result at Y Bala saw the poor 1.60W/m²K pre-installation U-value reduced to 0.29W/m²K.

To achieve these tough target U-values the webertherm XP EWI system required 90mm of EPS insulation which was mechanically fixed to the external wall surfaces prior to the render application. The Britannia Square properties had an angled corner coin feature and the client required this to be altered to a normal square edge corner profile for a more modern look. R W Hough masked this original feature with an extension of the EPS insulation prior to render application.

The revolutionary webertherm M1 render is a through-coloured, factory-batched, lightweight mineral render formulated for one-coat application. The system was applied with a combination of pump delivery and skilled hand application. The first pass of render is applied at 6mm and the meshcloth laid-in and, as the render takes up, a second 6mm application is made to deliver a total of 12mm of render for durable, low maintenance protection. CCG specified a dash finish to match other properties in the region and Ashton Cream was selected from an extensive colour palette. Over 4336m² of EWI have been applied at these two locations.

Geraint Jones, project manager for R W Hough during the six month program, reports on the success of the project: “Everyone is really pleased with the results here. We had good weather right through the program. The webertherm XP system requires such a straight forward application process and my team are always pleased to be using Weber high quality products.

“The properties now look clean, modern and rejuvenated and already the residents are commenting on the radical change in warmth. I’m sure they will also notice that the internal noise level is also reduced. One resident has told me that their thermostat is now set at half the usual level and they have plenty of heat and are very comfortable. This will mean considerable savings in energy costs.” Gary O’Brien, Assets and Contracts manager, CCG, said: “We are very pleased with the product and the assistance with specification and supervision provided by Saint-Gobain Weber. We look forward to continuing our good working relationship with the company.”

For more information about this project, or for technical support, please contact Saint-Gobain Weber on 08703 330 070, or visit www.netweber.co.uk. Customers in Ireland should call 028 9335 2999 or visit www.weber.ie.
A free download of the new weber.app for iPhone and iPad users is also available from iTunes and from Google Play for Android smartphones and tablet users. Follow Saint-Gobain Weber on Twitter @SGWeberUK for the latest company news and updates.
/0 Comments/by

New robust detail E-WM-30 for aircrete blocks announced

Knauf Insulation has welcomed a new Robust Detail for aircrete blocks, which has been included within the latest edition of the Robust Detail handbook, released on the 21st September.

The new detail E-WM-30, developed by Knauf Insulation in close co-operation with Robust Details, comprises two leaves of 100mm aircrete blocks, with a 100mm cavity that has been fully filled with the blown mineral wool insulation Supafil® Party Wall. It is the first Robust Detail for aircrete blocks, with a blown retrofit solution that negates the need for a wet parge coat; only a plasterboard lining is required, saving time and money on site. The detail will also achieve three points in the Health and Wellbeing section of Code for Sustainable Homes assessments.

Stephen Wise, Glass Product Manager at Knauf Insulation, said: “We are always striving to develop cost effective solutions for our customers to make their life easier, and this new Robust Detail is no different. We have developed this detail without a parge coat to deliver greater process efficiencies, and it offers high levels of acoustic and thermal performance, which can satisfy the requirements of the building regulations for a zero U-value party wall.”

John Tebbit, Managing Director at Robust Detail, commented: “We very much welcome this new detail, which will provide housebuilders with even more choice when it comes to designing and building properties. Like all new details, it has undergone rigorous in-situ testing and will comply with Part E1 of the Building Regulations in England and Wales.”

Aircrete is a lightweight aerated concrete material that provides good thermal performance and is primarily used for the inner skin of external walls. Cliff Fudge, Technical Committee Chairman at Aircrete Products Association (APA), said: “The new Robust Detail will provide our customers with more options for using aircrete blocks in separating party walls – delivering them the acoustic and thermal performance they need.”

This detail is the latest in an on-going programme of development of Robust Details that Knauf Insulation are working on, to deliver the widest range of party wall solutions for housebuilders.

For more information regarding the Robust Detail please visit www.robustdetails.com/the-handbook/selecting-your-robust-details/masonry-walls/e-wm-30
/0 Comments/by

Building to Passive House standards with PU insulation

A house built using polyurethane materials consumes 85% less energy than a home built from conventional materials. They can provide very high levels of insulation with minimal thickness which in turn allows architects and designers to maximise the use of interior spaces. It is perhaps no surprise then that when it came to the construction of a passive house in Belgium, polyurethane insulation materials were used to create a highly insulating building fabric. Three years on, has the Polyurethanes Passive House in Brussels and its very well insulated and sealed envelope provided a comfortable and healthy environment throughout the year?

The end-of-terrace four-storey family house developed by ISOPA, the European trade body for diisocyanate and polyol producers, was completed in Evere near Brussels in 2013. It is now occupied and working as a low energy test bed, its running costs and energy use closely measured to show the savings possible for homeowners.

While there are over 12,000 new build Passive House certified buildings across Europe, the ISOPA house is unusual in using a high proportion of PU to achieve its highly insulating fabric first design which reduces the need for heating and saves around 80% of the energy used by a normal house. PU insulation has been used wherever possible from wall cavities to the floor, and windows to the roof.

The house has been designed so that all of the construction elements work together in an integrated way, from the solar panels on the roof to the geothermal heat pump and MVHR system which ensures that warm fresh air circulates internally despite the high air tightness levels. The University of Leuven has been evaluating the home’s overall performance, energy use and indoor comfort levels which would verify whether the PU products as installed were really achieving the calculated performance levels.

The analysis of the data yielded an estimated heat loss coefficient of 60.0 W/K, with a standard deviation of 3.0 W/K. This indicates that the thermal performance of the building fabric meets the very high standards expected, which was instrumental to the project reaching the performance levels required for Passive House certification.

Known for the comfort they provide, polyurethanes are ideal for Passive House construction because they provide very high levels of insulation thanks to low thermal conductivity, meaning they provide reduced thickness increasing their affordability and reducing the impact on building footprints. As well as requiring fewer adjustments to be made to the design of buildings and less aesthetic compromises such as with deep window reveals, further cost savings on depth of eaves, joists, rafters or studs, lengths of fixings can be achieved. In short, the extremely low U-values required for Passive House projects can be much more easily achieved with PU than with other materials as far fewer changes to design detailing are required.

Rigid PIR insulation boards are also light but strong, moisture-resistant and easy to install, and they, as well as spray foam PUR insulation, retain their insulating properties for the life of the building. Last but not least, PU materials contribute to preservation of natural resources by reducing the need for energy which assists their sustainability credentials in Passive House projects.

With a daunting 80% reduction in carbon emissions on 1990 levels called for globally by 2050, such efforts to create practical ‘near zero energy’ houses are essential. With houses accounting for 40% of energy consumed across Europe, achieving the means of constructing new Passive Houses affordably using PU which can deliver the results while saving homeowners money is the realistic way forward, as demonstrated at the Polyurethanes Passive House.

by Marleen Baes, BRUFMA Technical Committee Member

For more information about BRUFMA visit www.brufma.co.uk.
/0 Comments/by

Noise-free housing for happy living

Good acoustics, like high quality thermal insulation, is one of the most important considerations for house builders and architects. This is because of high density living and, in particular, the popularity of sold floors. For example, one of the latest trends are polished concrete floors in variety of different colours. The problem is further exacerbated by the desire for large areas of glass and the absence of soft furnishings, such as curtains and carpets. The result of all this is that absorption of sound is difficult and reverberated sound can create an unpleasant environment.

One increasingly popular solution is to line the ceilings with cost effective and high performance Troldtekt acoustic panels. Widely used throughout Europe, the panels instantly create an attractive surface, pleasant acoustics and a feeling of well-being throughout the house.

Apart from a calm and cohesive surface, the ceiling offers a flexible choice of design, including different colours, surface structures, edge profiles and suspension systems. In addition it is possible to integrate surface mounted or concealed light fittings as well as sound speakers. The Troldtekt speaker is an acoustic panel with a specially developed flat unit, built in and concealed on the back of the panel. The sound waves pass through the panel and are distributed evenly throughout the room, covering a larger area than a traditional speaker.

Danish manufactured Troldtekt acoustic panels are specified throughout the UK. Made with 100% natural wood fibres, their benefits are high sound absorption, high durability, natural breathability, low cost life cycle performance and sustainability documented by Cradle to Cradle certification at silver level.

Apart from housing, they are used to improve acoustics in many different projects, such as schools, leisure centres, pools, commercial and public buildings. Available in various sizes and in three grades from ultrafine to coarse, they can be left untreated or painted in virtually any RAL colour.

For samples and comprehensive technical information tel 01978 664255 or visit www@troldtekt.co.uk.
/1 Comment/by

Recticel Insulation set to showcase new feel-good systems at Vision

A new philosophy and a new product will headline on Recticel’s Vision stand.

Leading PIR manufacturer Recticel Insulation (stand 45) is launching its new “Feel good inside” philosophy and debuting a self-supporting room-in-a-roof system for pitched roofs at this year’s Vision built environment exhibition for architects, specifiers, clients and suppliers (June 7-8, Olympia).

The next-generation product, L-Ments™, comprises roofing underlay, counter battens and integral structural timber in one PIR insulation panel as a single lightweight cost-effective modular roofing element, making it exceptionally quick and easy to install.

The innovation new system enables specifiers and contractors to design and build roofs without the risk of thermal bridging, providing them with a future-proof solution thanks to its high-performance insulation core.

Using L-Ments in conjunction with Recticel’s full fill cavity wall insulation Eurowall + provides specifiers and contractors with a holistic building solution for the complete building envelope that showcases this “feel good inside” approach.

It also showcases Recticel’s fabric first approach to build as well as Modern Methods of Construction via the use of fewer materials and speedier installation.

Representatives from Recticel’s technical department will man the stand to answer technical questions, advise on building materials, installation, prices, grants and bespoke solutions for specific needs.

For more information please visit www.recticelinsulation.co.uk.
/0 Comments/by

It’s a cover up!

Although modern renovation plasters are a superb alternative to tradional types; don’t overlook the possibilities impervious coverings – along with hybrid and insulated plasterboards. So says Hudson Lambert, director of Safeguard Europe.

Impervious coverings come in a few varieties, yet easily the most popular are meshed cavity drainage membranes. These are attached to walls using special fixing plugs, and then can be plastered over using traditional gypsum, lime or other plasters. Effective as they are, it should be remembered that despite a notional air gap behind the membrane, these systems are not breathable and will drive rising damp further up the wall unless controlled at source using a high specification remedial damp-proofing cream or rod.

More recently, fleeced DPMs are a natural development from meshed cavity drainage membranes. First, a flexible waterproof adhesive is applied to wall, then the fleeced DPM applied over adhesive and, finally, traditional plasters can be applied on top.

These have the same disadvantages as meshed cavity drainage membranes; yet are faster to apply and their lower profile makes it easier to blend them in with existing plaster finishes.

Beyond these two types of membrane are new systems based around ‘hybrid’ plasterboard. The design intention of these is to utilise the convenience of plasterboard, yet enhance it to reliably allow its on walls susceptible to damp. This is especially useful in situations where speed is important (e.g. tenanted properties where decanting may be inconvenient) and decoration can take place as soon as the system is installed (when using dry joints rather than a plaster skim).

Although they are not suitable where wall surfaces are particularly uneven, they are Breathable (except where foil-backed or insulated plasterboard is used) and BBA approved types are available – which acts as reassurance to clients such as local authorities.

Installation is relatively straightforward: water-repellent/salt-disrupting silane cream is applied to wall and plasterboard applied in the traditional way (although water/salt resistant MS-polymer adhesive is used instead of traditional gypsum-based plasterboard adhesive). ‘Synergistic’ chemistry ensures a high strength chemical bond between the silane cream and the MS-polymer adhesive (due to covalent bonding between the silane components of both materials).

While a plaster skim is usually applied over the plasterboard, using a ‘dry jointing’ method allows the fastest results – and means walls can be re-plastered and re-decorated in less than 24 hours.

If required, the system can be used in conjunction with insulated plasterboard. However, as is always the case when using internal wall insulation, certain precautions are required to minimise condensation risk and it will hinder drying out of the wall compared with when standard (porous) plasterboard is used.

For more information please visit www.safeguardeurope.com.

/by

Energy savings for Bristol family with EWI by Saint-Gobain Weber

weber.therm XM External Wall Insulation ( EWI) has been installed on a two-storey end of terrace, privately owned property in the Brislington area of Bristol. This is just one of several upgrades being undertaken by the homeowner which have included the addition of a large extension to the side of the property; a loft conversion; the addition of a garden room to the rear and new windows and doors throughout.

“We bought this 1960s property knowing that a substantial makeover was needed and being in the construction business I could see the potential and have managed a lot of the work myself,” says Mark Holden, property owner. “The property was unattractive, even ugly, with hard to treat solid walls, and it was cold. We wanted a more attractive home and greater comfort for our young family.”

The application of BBA accredited and Energy Saving Trust listed weber.therm XM EWI was carried out by M P Plastering Limited, Somerset, renowned for excellent render application skills and experienced with use of the weber.therm EWI systems. The couple sought Green Deal funding with the help of M P Plastering, a Green Deal certified applicator, and successfully achieved a 75% contribution toward the £9,000 cost of the EWI project.

“The Green Deal funding was surprisingly easy to achieve,” says Mark Pickthall, M P Plastering, “which is just as well considering how cold the house was and that there was a young family to keep warm. The property looks completely different now with the application of Weber’s EWI system. We like everything about Weber from start to finish. Great representation, excellent technical support, industry-leading warranties and products that are consistently reliable.”

The weber.therm XM EWI system used on this property included 90mm thick expanded polystyrene (EPS) insulation which was mechanically fixed to the outer skin of the wall substrate. The render process requires two passes of weber.rend LAC, a cementitious render into which the fibreglass reinforcement meshcloth is embedded to give a robust render coat. When dry the surface is primed with weber PR310 in preparation for a 1.5mm thin coat decorative finish of weber.plast TF, an acrylic based, pre-mixed, textured finish, in Winter White. The porch has been finished in weber.pral M one-coat, through-coloured monocouche render in Chalk. weber.therm XM EWI is capable of substantially improving the U-value of a property in a retrofit project, and produces exceptional levels of energy efficiency on new builds.

“Where I had made additions and re-modelled the internal space the external walls were in an awful state. And from an aesthetics angle, it was great to cover the whole exterior with EWI. We can no longer see the scars and joints,” continues Mark. “Work started at the coldest time of year in November 2014, but within weeks we were feeling the benefit of the EWI. During a particularly cold spell we found there was no need to switch the heating back on after the timer programme had lapsed each morning which would have been necessary previously.” By February the property was fully wrapped and rendered.

“The massive visual improvement to our home is quite amazing,” says Mark, “but the saving we have made on our monthly fuel outlay is incredible. From an average of £150 per month during the winter months we are now paying around £80 a month, that’s a very big saving for a family.”

“We have carried out many projects on this property and my wife and I agree the EWI application has been by far the most successful element of our plans.”

Weber products are manufactured from carefully selected raw materials at purpose-built facilities in Bedfordshire, Shropshire and Ireland where quality and consistency is achieved.
For more information about this project, or for technical support, please contact Saint-Gobain Weber on 08703 330 070, or visit www.netweber.co.uk. Customers in Ireland should call 028 9335 2999 or visit www.weber.ie.

A free download of the new weber.app for iPhone and iPad users is also available from iTunes and from Google Play for Android smartphones and tablet users. Follow Saint-Gobain Weber on Twitter @SGWeberUK for the latest company news and updates.

/by