EXTERIORS


27


Ongoing benefi ts of technical support shown by Wraptite®


installation at new high school S


, on a previous project, they have now applied that experience to another LEIP-funded school project.


pecialist contractors working on a new high school in Dumfries have shown the ongoing benefi ts of technical and learning support when it comes to delivering low energy construction. Having already used the A. Proctor Group’s external air barrier, Wraptite®


As a self-adhesive membrane that is both airtight and vapour permeable, Wraptite is designed to contribute to precisely this kind of building performance and fabric specifi cation. Although Dumfries High School is not targeting Passivhaus certifi cation, Wraptite’s credentials are boosted by its status as a Passivhaus- certifi ed component.


Installed to the outside face of external walls,


Wraptite helps to achieve higher standards of airtightness by simplifying detailing and reducing the number of penetrations. At the same time, its vapour permeability allows the passage of moisture vapour out of the structure,


avoiding any increase in condensation risk. The Wraptite membrane at Dumfries High School was the responsibility of specialist contractors Cairnhill Structures, as part of designing, supplying and installing the complete structural framing system and other associated works. Working with a product like Wraptite for the


fi rst time, especially when required to deliver a low energy design target, can be daunting – as our case study about Liberton High describes. For Cairnhill Structures, they had previously


used Wraptite on another school project. “We installed it on the Monifi eth Learning Campus project,”


said Carlos Simoes, Contracts


Manager - Framing at Cairnhill Structures. “As part of that project, we arranged an installation and training workshop at our factory in Coatbridge with Linda Kay and Lewis Stanley.” Linda and Lewis are Regional Sales Manager and Business Development Manager at the A. Proctor Group respectively. Experience


is particularly vital when it


comes to working with the variable nature of the Scottish climate. “Installation during the Scottish winter can be particularly diffi cult,” noted Carlos. “However, as Wraptite is self- adhesive, installation is a relatively simple and fast process. It also provided excellent weather protection for following trades.” While the A. Proctor Group had delivered training on a previous project, support did not end there, as Carlos described: “Linda visited site on several occasions throughout the installation process to carry out site inspections.”


01250 872 261 proctorgroup.com/products/wraptite


AIM wall cavity barrier under zero compression A


IM – Acoustic & Insulation Manufacturing has demonstrated that its Wall Cavity Barrier (Red Edition) provides effective fi re performance without compression in masonry construction. The new zero compression solution means AIM’s Wall Cavity Barrier (Red Edition) can be installed easily with green brickwork, or other forms of masonry cladding, and avoids the problem of “brick push off” which can be associated with barriers installed under compression. Acting as a fi re and smoke barrier for masonry cavity walls, AIM’s Wall Cavity Barrier (Red Edition) is used to provide a fully closed cavity fi re barrier along compartmentation lines in the external cavity wall in a wide variety of construction types, including masonry and SFS. The different barrier thicknesses of 75 mm, 100 mm and 125 mm provide 30, 60 and 120-minute fi re ratings to BS EN 1366-4.


Applicable to masonry construction only, zero compression installation has been tested


horizontally and vertically for use within voids up to 400 mm. The barrier is installed and then the bricks built up


against its edge. Once the mortar has set, AIM Acrylic Intumescent Mastic should


01293 582400 www.aimlimited.co.uk


be applied between the barrier and both substrates. A DPC separating layer can be included if required. “Tests have demonstrated that the AIM


Wall Cavity Barrier is effective without compression in masonry voids, a signifi cant product enhancement that offers far greater fl exibility during construction,” explains Ian Exall, AIM’s commercial director. The high-density foil faced stone wool barrier also reduces airborne transmission of sound by a minimum of 21dB RW. AIM will sell slab versions of the Wall Cavity Barrier (Red Edition) for zero compression applications – not cut barrier. This is so that the installer has total fl exibility in sizing of the barrier to exactly suit the cavity void size as required. Installation details, with a step by step


guide, can be found in AIM’s Wall Cavity Barrier (Red edition) Technical Guide, which can be downloaded at aimlimited.co.uk/ solutions/wall-cavity-barrier.


WWW.BUILDINGCONSTRUCTIONDESIGN.CO.UK


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34