STRUCTURAL COMPONENTS


to manipulate, shape and form by hand. They can be stretched over details while dressing to give a smooth, neat and premium lead-like appearance, allowing easy application for a wide range of details. Whats more, lead-free ashing does


not require bossing like lead does, so it is quicker to install. While lead components typically require a lead specialist to be subcontracted, opting for lead-free alternatives eliminates this added time and cost as the installation process does not depend on specialist skills or tools.


It is important to note that if lead-free ashings are incorrectly installed, water ingress could still occur. That’s why competent installation is necessary.


INSTALLATION TIPS


Ahead of installation, it is key to ensure all surfaces are dry and free from dust, oil and moss, before laying the ashing. It is also crucial that self-adhesive lead- free ashings are not used on bitumen or tar surfaces. Some superior lead ashing alternaties hae a perforated release paper on the back which allows direct application onto the tile surface once removed. If installed in lower temperatures or applying ashing to damp surfaces, specialist glue can also


be used to ensure strong adherence to the roof.


The best practice when turning into brickwork joints or chasing in, is to allow a minimum of 30 mm. When it comes to sealing, ashing sealant should be used for brickwork oints. Strips of ashing which are folded into wedges are a good way to hold the ashing in place in the brickwork joint, prior to sealing. Under no circumstances should silicone-based sealants or adhesives be used. or long runs, self-welding ashings can simply be overlapped, although with available lengths of up to 10 metres it may not even be necessary. Some products are eible and able to stretch in both directions, which allows the product to move without the use of an expansion joint or consideration of a maximum length. When using self- welding ashings, oerlaps should be no less than 50 mm, using a roller to apply pressure. Any gaps must be supported to prevent sagging and water build-up.


ADDITIONAL CONSIDERATIONS To get the best results, roofers should follow the manufacturer’s guidance because not all lead-free replacements will be the same. Superior lead-free alternatives have unique properties that allow them to overlap by up to 50 mm


Farmhouse warms to external Wraptite® airtight solution


 new self-build farmhouse in the beautiful Scottish countryside has been fi tted with the high-performing Wraptite air-barrier. The project is designed to Passivhaus standards by Architect Frances Strachan-Friar. From the outset, the aim was to achieve a more sustainable design and follow a different approach from the traditional timber kit. fter undertaking signifi cant research into different types of construction, the architect selected Xilonor CLT cross-laminated timber installed by Glulam Solutions Ltd., Inverurie. Frances Strachan-Friar commented on how the selection of Wraptite has benefi tted the deelopment. The specifi cation of the correct type of airtightness barrier was critical in achieing thermal effi ciency. Wraptite was chosen because it allows the airtightness layer to be fi tted to the outside of the construction. n doing so, the eternal application of Wraptite proides essential protection in the form of waterproofi ng and weatherproofi ng for the CLT during the build. The Wraptite system was great and easy to apply, especially around unctions, enabling us to seal all of the junctions completely. The use of a traditional membrane would not have given the same performance.  hae preiously specifi ed products from the A. Proctor Group, but this was the fi rst time using Wraptite. Proctors proided a comprehensie Toolbo Talk and hae been a great support throughout the project.”


01250 872261 www.proctorgroup.com Secure in the knowledge SBH11_A Proctor_Building Envelope - Air Tightness_DPR.indd 1


Burglary is common in the UK – a new break-in occurs every 106 seconds – that’s 34 burglaries per hour, 817 per day. There’s a one in 43 chance of your household being burgled. With the colder, longer, darker nights, we especially start thinking about home security and keeping down our energy bills – a particularly important consideration during the current cost of living/energy crisis. Crittall Windows, the pioneer of iconic steel frame window manufacture for almost 180 years, says its advanced steel framed window, HomelightPlus ticks all the boxes for making your home more secure and helping keep down costly energy bills.


Russell Ager, managing director of Crittall Windows, says: “Look to the innovation in window frame development. For example, our re-engineered HomelightPlus range of residential windows is the 21st Century enhanced ersion of the original Standard etal window fi rst made by our company during the s. t brings new-look styling and window profi ling, plus higher energy-saings, performance, and enhanced security. “Whatever the type or size of your property, it’s an authentic ‘like for like’ steel window. Peace-of-mind is reassured through an improved, robust, security multi-point locking option tested to the Enhanced Security PAS 24 standard – so the window is especially secure.”


01376 530800 crittall-windows.co.uk


SBH11_Crittall_Building Fabric - Doors & Windows_DPR.indd 1 46 www.sbhonline.co.uk


Image: Burgess Architecture 01/11/2022 16:00


and form a weld due to their eibility, whereas, other more economical lead- free products would require a welt detail. You may also wish to look for quality products that hold third party accreditation, when choosing roofing components, to give additional peace of mind. For example, if a product holds BB certification, product performance has been erified based on rigorous testing and standards. On top of this, checking the product guarantee and opting for ashings with long promises of assurance is advisable.


AND FINALLY…


Roofers should also not neglect primary on-site safety procedures. It’s essential to take safety precautions, especially for pitched roofing work. Those installing roofing components must be competent in using the latest techniques, standards and materials and training should include safe working practices.


Thanks to advancements in lead-


free ashings along with best practice installation methods, it is clear that roofing contractors can complete high- performance roofing proects with ease when they decide to go lead-free.


Nick King is portfolio manager at Klober


09/11/2022 13:30 nov/dec 2022


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