Latest entrant to the green-roof market in the UK is Icopal, which has introduced the Icopal Green Roof System. It is combining its waterproofing expertise with the experience of its new partner, Greenscape (UK), which has more than 35 years' experience in the green roof market. Icopal is aiming at both the extensive and the intensive markets. Extensive roofs, such as the biodiverse roofs described on the previous pages, have a relatively thin substrate, and are not usually intended for recreational use. Intensive roofs are much heavier and more densely planted.
These are typically roof gardens and, indeed, if they are at ground level - above, typically, underground car parks - the general public may not be aware that they are roofs at all.
Like Sarnafil, as described previously, Icopal is offering a one-stop shop, an attractive solution in terms of organisation and of contractual responsibility. It is basing its solution around Fytocell, a material that acts as a substrate and a flaked soil enhancer.
It offers, claims Icopal, a reduction in irrigation costs of up to 30 per cent. Fytocell flakes make up 40 per cent of the total soil mixture, reducing the weight of the soil mix significantly compared with standard topsoils, and so allowing the support structure to be downsized.
The company has a network of approved contractors, and offers a full back-up service.