A Blackdown green roof system from sustainable roofing specialists Alumasc has been chosen for the new National Trust Visitor Centre at Portstewart Strand in County Londonderry.

The National Trust is Northern Ireland’s largest conservation charity and the Strand, nestled amongst a 2 mile stretch of award-winning beach and sand dunes, has been designated an Area of Special Scientific Interest and a proposed Special Area of Conservation.

Donnelly O’Neill Architects of Belfast were challenged with a design brief that was strict in its requirement. The roof needed to be sympathetic to its surroundings and in keeping with the environmental ethos upheld by the National Trust, whilst the exposed location of the centre also presented the problem of wind erosion.

Alumasc were able to provide a complete waterproofing and green roof package that not only met the technical specification of the brief, but which has also provided a valuable resource for local wildlife that will continue to flourish over time.

400 square metres of Derbigum high-performance waterproofing membrane were installed with extensive sedum plug plant cover. The problem of erosion was overcome by the inclusion of an anti-erosion mat in the affected areas.

Alumasc green roofs vary from Extensive and Biodiverse types, which require no irrigation and minimum maintenance, to Intensive green roofs which require regular irrigation and maintenance. Extensive green roofs offer greater ecological benefits than other planting options and will fully support the rich community of plants and insects found in the open sand, dunes and damp hollows of the Strand.

Hilary McGrady, The National Trust’s Director for Northern Ireland, commented, “The National Trust, in looking after special places, for ever for everyone, invests in places like Portstewart Strand to ensure members and visitors have amazing experiences and the opportunity to enjoy our special places”.