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Weber External Wall Insulation Salutes Success Of Colchester Barracks Development

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Weber External Wall Insulation Salutes Success Of Colchester Barracks Development


Published by Jackie Biggin for Weber in Housing

After the application of Saint Gobain Weber's EWI After the application of Saint Gobain Weber's EWI

The versatility of the weber.therm External Wall Insulation (EWI) system has been demonstrated at a major housing development at Colchester Barracks inEssex. Substantial areas of the Ministry of Defence garrison land-holding have been released for development including large numbers of redundant domestic quarters which have remained un-occupied since staff numbers have been reduced.

The Oakapple Close site, being developed by Lovell on behalf of Iceni Homes, features existing properties requiring renovation to modern standards, as well as new-build dwellings, all designed to meet the Code for Sustainable Homes standards. The weber.therm EWI system has been employed for both applications. Essex Insulation of Basildon, Essex, is the selected multi-disciplined specialist-approved contactor for the Weber EWI installation.  Essex Insulation is also involved in several other insulation applications on this project.

The first phase of the development features 73 existing properties which are to be brought up to standard along with a further 61 new-build units.  These homes will be offered with affordable rent to local families through Colchester Borough Council’s choice-based lettings scheme.

Structural additions and modifications to the refurbishment properties include rear extensions to expand the kitchen areas, new front porches and full insulation of the dwellings. The weber.therm XM EWI system has used 100mm of expanded polystyrene and an additional 130mm of phenolic insulation around raised window openings, installed onto the existing walling using mechanical fixings and weber.rend LAC.  Meshcloth reinforcing has been applied using further weber.rend LAC, which when dry is finished with weber.plast TF, an acrylic based composite to achieve a textured, decorative and highly protective surface.

On the 60 new-build units, cavity wall insulation has been built into the properties and the weber.plast TF thin-coat, factory mixed decorative finish is applied direct to the outer walling substrate. weber.plast TF has excellent all-round weather performance and is delivered factory-batched and ready for use. A wide range of colours are available and on the Oakapple Close site over 2,300m³ of varied colour panels have been used to add striking variety to the base white finish of these high quality homes.

Iceni Homes is running a trial within this development where additional insulation has been added to two properties and the thermal performance will be monitored for future specification details. Robert Frost, project manager for Iceni Homes, is eager to see the results. “The additional insulation includes installing the weber.therm XP below DPC to minimise thermal loss at ground level. Our calculations show an overall improvement in thermal ratings and it will be interesting to monitor the real live results.”

For this application the 100mm expanded polystyrene insulation is installed with stainless steel fixings and metal lath is used in addition to the lightweight meshcloth to give stronger impact protection support to the weber.therm L2 render covering. This is a one-coat, lightweight, polymer-modified cementitious render for use below DPC. This is applied at 15mm nominal thickness and then finished with weber.sil P silicon resin emulsion paint.

The Oakapple Close project provides a full demonstration of the versatility of the weber.therm EWI system and related Saint-Gobain Weber products. Future residents will benefit from high thermal efficiency coupled with pleasing aesthetics and long lasting protection.

Please call 08703 330070 for more information about weber.therm External Wall Insulation and render systems or visit and request a copy of the Weber Render Solutions handbook in hard copy or CD format


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