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Insulation with inspiration

Newsroom

Monday 30th November 2015

Caparol Project - Detached properties, Stone, Staffordshire

Caparol EWI providing thermal efficiency and a contemporary finish.

Neighbouring properties on a small housing estate near Stone in Staffordshire have been given a complete face lift with the installation of Caparol external wall insulation. Built in the early 70s the two detached homes are typical of properties from that era being of a brick and block cavity wall construction but poorly insulated and thermally inefficient. Both homeowners found their homes draughty and cold especially upstairs and also felt that the exterior was looking dated too.

Caparol external wall insulation was specified by the applicator in conjunction with the homeowners as the ideal solution to upgrade the thermal efficiency of the homes as well as transforming them aesthetically too.

Planning permission was sought by the homeowners as they had decided to change the front aspect of the properties from a vertical tile and brick façade to a more contemporary render and brick slip finish. CGIs depicting the finished property along with brick slip samples were submitted to the planning department. Planning approval was straightforward, but necessary, since the properties were going to look substantially different on completion.

Removing the tiles to the front elevation identified substantial gaps in the mortar joints of what transpired to be a single skin of blockwork. This explained why the upstairs areas were exceptionally cold during the winter months.

The Caparol system installed comprised of graphite-enhanced expanded polystyrene which ensured improved thermal efficiency and has reduced the U value from 1.28W/m2K to 0.27W/m2K. The mechanical fixings were countersunk into the insulation using expanded polystyrene rondelles which provided ease of application of the subsequent render and minimised thermal bridging, ensuring optimal thermal performance.

Both properties have been finished with render to the upper floor with acrylic brick slips at the lower level which provides an extremely robust finish for these high traffic areas around the property.
The acrylic slips have also been used for quoins and soldier band features to the heads of the first floor windows. The colour and style of the slips were carefully selected to match the surrounding environment.

Both properties had new thermally efficient windows installed as well as the removal of a bay window creating a modern clean line across the front of the house in addition to minimising thermal bridging at a critical interface. This was ideal timing for the owner to install the external wall insulation while other works were being carried out.

Jill Kaufman, one of the homeowners commented, “The house was so cold and draughty and looked a bit dated, but now with the external wall insulation installed it looks fantastic and is a really comfortable temperature inside and we‘ve already notice a reduction in our fuel bills. The whole installation went smoothly even applying for planning permission was fairly straightforward. Some of our neighbours have already shown interest in getting Caparol’s external wall insulation installed on their homes too!”

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