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passivehouse+ | Issue 11


Alsecco EWI chosen for Exeter passive house scheme Gale & Snowden Architects have specified Alsecco’s Basic 1 external wall insulation system for the construction of 14 passive house units in Exeter. Following on from the success and lessons learnt on a previous scheme, Exeter City Council commissioned the architects, who are Passivhaus Trust members, for this project. The developments of Brookway and Bennett Square form part of an on-going strategy to build more council homes to address fuel poverty in the area. The properties have been built on infill sites, making use of areas of land not presently being utilised. Alsecco’s Basic 1 external wall insulation system was specified, and incorporated 250mm of grey expanded polystyrene above the DPC, with 250mm of extruded polystyrene below. The EWI system was installed to the exterior of the medium density blockwork construction, eliminating the danger of interstitial condensation and thermal bridging, since the insulation is on the outside with the thermal mass of the blockwork retained inside. Specialist EWI installer PRS Group installed the EWI system with a Silitect top coat finish in three shades of red on some properties and cream on the others, making for a striking visual appearance of the blocks as a whole. A particular design and environmental feature of the project was the installation of 15kg bat boxes to the gable ends of the blocks. Alsecco identified that standard fixings could not be used to install

the boxes, as it was essential to avoid cold bridging, therefore the boxes were installed using the Dosteba fixing method. Built by main contractor Interserve, the new homes will be let to families in need of housing, with three of the new properties having full wheelchair access. The properties also incorporate

further energy efficiency measures to achieve the passive house standard, including triple-glazed windows to complete the insulation of the envelope, and mechanical ventilation with heat recovery. Alsecco’s EWI system was chosen for Exeter City Council’s latest passive house schemes in Brookway (pictured) and Bennett Square

JG Speedfit picks up awards & launches wireless TRV JG Speedfit has picked up two Wolseley Supplier of the Year awards for the second year running, one from Plumb Centre (pipes, valves and fitting) and from BCG Distribution, two of Wolesley’s sub brands. Wolseley is the world’s largest trade distributor of plumbing and heating products and a leading supplier of building materials. JG Speedfit’s director of UK sales, Mike Riseley, picked up the awards in February at the Wolseley Supplier conference earlier this year. “It is humbling to be recognised for our achievements, however it must be said that it is a collaborative approach to our business relationships that make these awards possible,” Mike Riseley said. “I would offer my sincerest gratitude to all the individuals from both Wolseley and John Guest Speedfit who have played a role in our mutual success.” JG Speedfit has also announced the launch of a new wireless thermostatic radiator valve, the JG Aura TRV, which is available to purchase from 1 July 2015.

The valve has been designed to efficiently regulate the hot water to each radiator in the house. The new valves are controlled wirelessly by a JG Aura thermostat in every room, and can send a signal to the JG Aura network that would then turn the boiler off when a desired room temperature has been reached. JG Speedfit also recently launched a new website at that is designed to give a visual focus to the functionalities of the brand's product ranges. The website features videos of best installation practices, technical advice and product specifications. JG Speedfit is an easy to use, plastic push-fit system suitable for the plumbing of hot and cold water services and heating applications, from leading plumbing manufacturer John Guest. The flexible piping system is designed to significantly reduce installation time without the need for specialist tools.

(right) the JG Aura TRV, JG Speedfit’s new wireless thermostatic radiator valve

Profile for Passive House Plus (Sustainable Building)

Passive house plus issue 11 (UK edition)  

Passive house plus issue 11 (UK edition)