Mr. Brian O'Mahony:

The upper range is around €20,000 for a typical finish. Some people might go for different finishes on the external wall, and that would be a four-bed or detached type house, so it would be for four walls. With a mid-terrace house, with either two or three bedrooms, only the front and the rear are being insulated. There are party walls on two sides, so they do not have to be done. It is not necessary to divide by four and say it is 20 divided by four because there are set-up costs, etc. We would be costing somewhere between €10,000 and €12,000. A semi-detached house might be in the range of €15,000 to €16,000. The reason there is a difference in the range is that many houses are not just square boxes or cubes. There are extensions, garages, kitchens sticking out, etc., so there are variations on them. However, all the contractors, for external wall insulation, basically price by square metre.