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Kershaw Contracting solves a narrow problem

An innovative company has fixed the problem of cavity walls that are too narrow for standard insulation with the first installation in June this year.
Kershaw Contracting Services has worked closely with manufacturer Isothane to adapt liquid polyurethane foam for cavity walls.

It is normally fitted by the company as a successful solution for deteriorating wall ties, to reinforce the walls.

The second installation for the new use of the product will be in July for a 13 storey block of flats in the London borough of Redbridge.

The £45,000 contract is on behalf of Climate Energy, under the Social Housing Energy Saving Programme (SHESP).

'Usually when we install cavity wall insulation, we are working with a gap of at least 50mm,' explained Ian Macklin, managing director of Kershaw Contracting Services.

'But the gap in the wall of these flats is only 40mm. That's not enough space for the mineral wool cavity wall insulation material to move around properly and adequately reach all parts of the cavity.

'By using the Isothane polyurethane foam, we can guarantee it will fill the entire cavity. It is a closed cell foam that repels water, making it a good insulating solution.

'As it hardens, it will also reinforce the walls, which of course is what it was intended to do in the first place,' Macklin added.

'Now that Kershaw Contracting Services has pioneered the use of this foam in narrow cavity walls, we will be offering it to local authorities, housing associations and contractors for buildings that have previously been rejected for cavity wall insulation.'

As well as central heating systems and fitting cavity wall and loft insulation, the company specialises in the safe removal of asbestos.

It is a division of the Cambridge-based Kershaw Group.
12 August 2010


By Mel Price
12 August 2010 01:02:00
In response to the comment above by Kenneth Duckett I would like to reassure people that Polyurethane (PUR) Closed Cell Foam is widely used throughout house building these days and does NOT give off a horrible gas that occupants suffer from. This was a problem associated with a completely unrelated polymer type foam many years ago and does not apply to the high performance Polyurethane (PUR) Closed Cell Foam referred to in this article. PUR closed cell cavity wall insulation can combine very high insulation values with structural adhesive properties, draught-proofing, high resistance to wind driven rain penetration and is recognised by the Association of British Insurers (ABI), Department for Environment, Food and Rural Affairs (DEFRA), Department of Communities and Local Government (DCLG) and The Environment Agency for its superior Flood Resilience properties for limiting water damage to homes at risk of flooding.
By Kenneth Duckett
12 August 2010 01:01:00
Surely Foam is not a new insulation material for cavities. It is less used these days as it tends to give off a horrible gas that occupants suffer from. Polybead is normally the preferred alternative, therefore.
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