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60 EXTERNAL ENVELOPE


sheathing board. This allows for temporary water protection, airtightness and long-term vapour permeability. Along with the correct balance of insulation, this means a VCL may be less critical – yet it is important to assess this fully on a project by project basis. There is little doubt that a VCL (especially variable resistance membranes) can be advantageous in several applications to reduce the moisture flow through a building envelope, but less critical in some areas, depending on the insulation placement. For example, when placing insulation purely in between the frame of a timber frame building, the moisture risk may be too high to omit the VCL and therefore should be used to reduce vapour progressing through the structural frame. However, if this is balanced with insulation placed external to the structural frame, the dew point potential is reduced due to the warm frame and the VCL becomes less critical yet still good practice. A good appreciation of the key balancing of heat, air and moisture movement can work together for the benefit of architects and contractors in continuing to improve the way that we


Garador introduces wireless optical sensor for GaraGlide


Garador’s new electrically operated roller garage door, the GaraGlide, is now available with a wireless optical sensor as an option. You can therefore now choose between a wired or wireless optical sensor for this roller door. The wireless optical sensor is built into the floor seal and utilises light beam technology, so if there is an obstruction in the way of the door curtain’s downward path, when the light beam is broken the door curtain will stop. The new wireless optical sensor means there is no spiral cable required to connect the safety edge to the separate control panel housing. Batteries are required for this new device. This new feature provides the same reliable level of protection as the wired version and recognises when there is an obstacle in the door’s path. The GaraGlide is powered by a tubular drive motor and is supplied with two remote hand transmitters as standard, with either a standard (433 MHz) or bisecur (868 MHz) hand transmitter design. It has been designed so that it is quick to fit and easy to transport to site; the entire garage door fits neatly into just two double-wall cardboard boxes. Choose from 16 colours and two timber-effect finishes.


01935 443700 www.garador.co.uk/garador-range/roller-garage-doors.aspx New features for popular revolving door


Supplier of security and entrance systems solutions, dormakaba, has upgraded its KTV Revolving Door system, which now offers improved installation times and a new automatic Night Shield. With the dormakaba Direct Drive, the KTV Revolving Doors


now feature an impressive shallow ceiling assembly of just 100 mm, with an integrated LED light ring, allowing for the seamless integration with existing architecture. Thanks to the brushless motor, the doors benefit from enhanced life cycles – tested to 2 million cycles.


01462 477600 www.dormakaba.co.uk MasterPatio from Reynaers


Making it possible to introduce full-height glazing into spaces, MasterPatio from Reynaers leads on contemporary design while providing superior performance and functionality. Accommodating glazing up to 3.6 meters in height, the system is


suitable for a variety of applications, with slim sightlines ensuring a glass-to-frame ratio of around 90 per cent, maximising the presence of natural light. Delivering dependable performance, the system has been tested to BS EN 6375-1 and EN 10140-2 and meets to the Passivehaus standards where thermal performance is concerned.


0121 421 1999 www.reynaers.co.uk


design and construct buildings. From an industry and design perspective, it is important to understand that VCLs should not be relied upon solely to reduce moisture build-up but can have benefits when balanced with other factors. The Passive House Institute (PHI) component database helps specifiers to identify certified components, which have been tested and passed the required standards. Innovative products offer solutions that can help to achieve the fine balance between heat, air and moisture movement. Manufacturers are on hand to provide high-quality technical back up service around Passivhaus, including:  A Glaser and/or WUFI calculation service where appropriate to show the robustness of the proposed construction


 Tool Box talks, virtual if required  Specification guidance  Site visits (dependant on Covid restrictions) that can give a compliance report showing areas that are well installed and areas needing improvement in the installation.


Iain Fairnington is technical director of the A. Proctor Group


WWW.ARCHITECTSDATAFILE.CO.UK


ADF MAY 2021


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