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Our technical experts talk about the latest issues in your industry, provide technical advice on SFS intec products, and discuss key questions about the impact of fasteners in construction.

Top five rainscreen innovations

Posted on:  29 November
By:  Jamie Lewis

rainscreen blogThanks to the typically British weather, the increasingly popular application of rainscreen cladding is consistently put to the test. However, many contractors which have adjusted their businesses and skills in order to take on the new application of rainscreen cladding, have come across many installation challenges due to the major differences to traditional metal roofing and cladding.

But, by removing some of the complexity of handling and installation, from the design process through to its construction, system and component suppliers are now taking rainscreen to the next level and ironing out any existing imperfections.

I have compiled my top five innovations in rainscreen fixing systems which are helping to ease the installation of this popular system.

1. Primary fixings for masonry substrates: Universal fasteners cleverly designed for all masonry substrate applications eliminate the risk associated with installing the wrong anchor. They feature a unique 'fin' design on the fastener sleeve which gives additional grip, preventing the fastener from rotating and providing high pull out resistance in application. The unique collar design also ensures "knock in protection", avoiding premature expansion of the fastener which would ultimately lead to loss of function.

2. Self drilling fastener for aluminium subframes: For secure fastening of aluminium to aluminium subframe components, look for a self drilling fastener with a 6mm diameter body, as it will give an increased shear load value over traditional rivets and fasteners. With specially designed thread geometry, installation error is eliminated as it prevents overdriving or unwinding due to dynamic loading, and gives the user a quick and secure fixing.

3. 316, 316, 316: When specifying fixings for high design led materials like rainscreen, they have to be grade 316 stainless steel. It's worth paying a little bit more at the outset to ensure optimum performance in all but the harshest chlorine environments. This grade of steel will protect your build against corrosion from class C1 - indoor, no environmental stress, right up to Class C5-l - severe industrial environment and pollution. The large headed rivet for example, gives long lasting, high performance attachment to steel and other materials. With a 15mm diameter head and a body and mandrel made entirely from 316 grade stainless steel, the rivet will deliver high tensile value strength and prevent corrosion in even pollution and coastal environments. And with the additional benefit of colour matching the rivet head to the façade panel, you can create a truly blended fixing design.

4. Panel fixing kit: A panel fixing kit is a must for every façade installer - whether a professional or rainscreen newcomer - as it incorporates a drilling tool with interchangeable self-centring nosepieces. The kit ensures the installer will have accurate hole centralisation on every face fix, allowing for optimum build speed in even the most demanding façade designs.

5. The "blind" rivet: New innovations on the market are making the invisible attachment of high pressure laminate façades much quicker and increasingly error free. Unlike many screw type fasteners available for this application, the new "blind" rivet cannot be overdriven. The new mandrel design pulls back through the body of the fastener expanding it radially, creating a hollow fastener body. This ejects any moisture or debris collected in the pre-drilled panel hole through the fastener and not the front of the panel, leaving a perfectly smooth, dimple free panel front, just as the design intended.

All good things take time to bed in, but now that rainscreen has evolved, these new advancements will make things much easier for the industry overall.

Moving with the times

Posted on:  2010-12-23T15:43:27
By:  Colin Yeates

Sat on a train from Cheltenham to Leeds, I thought I would share my thoughts on the events of 2010. The year began with great uncertainty as projects planned for quarter one and two were placed on hold and quickly reduced in number. The project "bank" was at its lowest for over 15 years. On existing projects, poor weather conditions at the start of the year also caused massive delays for businesses across the supply chain, inevitably increasing the amount of pressure to complete across a shorter time scale.

Investors awaited financial clarity as the general election beckoned. Money was there to invest but the environment was far too uncertain and high risk to take chances. Demand for warehouses and distribution centres was at a record low.

The slow start to the year was quickly followed by a more productive quarter two and further improvements in project starts and tenders in quarter three. Activity started to reflect at least budget levels, but big projects were still being put on hold. Following the general election, we found that project delays began to reduce and the industry as a whole got back on track. It was good to see many large projects being kick-started and although there will be cut backs within the PFI sector, this will not be significant until 2012. And all of this as revisions to Part L of the Building Regulations were again implemented on 1st October.

Against these many challenges, it was pleasing to see so many lead specialist contractors and manufacturers survive through the year. There is now a more constant stream of work moving into 2011, in comparison with the latter end of 2010. We are all coming to terms with the implications of the revisions to the Building Regulations with further changes to airtightness specifications and an increase in ‘built’ costs, to name but a few. We can all draw positives on this as the stricter guidelines mean the assurance that a building will be airtight, now holds more ‘weight’ with clients and architects.

Post recession, manufacturers which have experienced the "innovate or die" conundrum have thrown themselves feet first into the development of new products, bringing exciting new innovations such as the TIA mechanical fix for easy tapered installation, to the fore. In addition, we have seen an increase in the number of quotes and tenders being completed by contractors, but they continue to face challenges on price levels. The good news is that work is being won but at barely above overhead recovery levels. Any profit to be had is very small as the building procurement process differentiates the simplest way it can - ever lower prices.

At SFS intec, we haven’t just sat by and watched this happen but looked to see how we can help. Never before have application and fastener solutions that truly take cost out of the build been more needed. Building in the same way as last year, accepting an even lower price for the same products and services, may result in business failure. I fear many will still experience this next year.

SFS intec and a number of our partner system manufacturers are, and have brought to market, innovative products and services that bring real in-place cost savings compared to thinking and doing things the way we ‘always’ have. ‘Game’ changing product design now exists, allowing the enlightened contractor to move with the times with reduced risk. For example, the modern and high performance thread design of the New Generation SX fastener maximised in design with secondary steelwork, allowing significant cost savings in steel purchases.

As we continue to face economic challenges, collaboration between parties in the supply chain at the early design stage will save thousands of pounds at the contract stage, as we have proved time and time again. The contractor must adapt and liaise with the manufacturer early in the process to take advantage of product and service innovations, and allow them to help reduce project costs at the tender stage. The sector cannot survive on lower prices for long. Now more than ever, we need to embrace the innovation that is out there, designing smarter without increasing business risk. A closer partnership between manufacturers and envelope contractors will provide the win-win situation for a more prosperous year for all.