Alumasc Exterior Building Products - Rainwater Management and Drainage, Flat Roofing, Green Roofs and Insulated Façade Systems

Alumasc Exterior Building Products (Alumasc) has been a leader in the UK construction industry for over 30 years with an annual turnover in excess of £30 million.

The company, part of the Alumasc Group, specialises in premium products for building exteriors, including aluminium and cast-iron rainwater solutions, aluminium fascia and soffits, Harmer drainage systems, rainwater management, flat roofing, waterproofing, green roofs and insulated façade systems.

Rainwater management and drainage systems

Alumasc is the UK´s leading manufacturer of BBA-certified aluminium rainwater systems and integrated fascias and soffits. The company also supplies Apex cast iron rainwater systems, the renowned Harmer drainage range which includes aluminium roof, floor and shower outlets and the BS EN 877 compliant Harmer SML lightweight cast-iron soil and waste system.

New from Alumasc is the Harmer Kessel rainwater harvesting system which facilitates the integrated design of overall rainwater management and storm attenuation packages. This wide range of proven, competitive solutions allow savings of up to 50% on non-drinking water usage. The new British Standard BS 8515 heralds the use of rainwater systems as a more mainstream element of construction, contributing to the efficiency and environmental success of individual schemes and helping developers meet the requirements of the Code for Sustainable Homes.

Green roofs

Alumasc ZinCo green roof systems can be applied to the majority of roof structures and are backed up by alternative waterproofing systems to provide a complete roofing solution. ZinCo Green roofs are available in four broad application categories; Intensive, Semi Intensive, Extensive and Bio-diverse, depending on the use and level of irrigation and maintenance access available.

Alumasc green roofs offer warranted systems for building developers, owners and users, benefiting the wider environment through their positive impact on sustainability, biodiversity and the attenuation of storm water.

Flat roofing, and waterproofing systems

Alumasc flat roofing and waterproofing systems consist of internationally renowned brands Derbigum and Hydrotech.

Derbigum is a BBA-approved range of dual-reinforced, atactic polypropylene (APP) modified bitumen, high performance roofing and waterproofing membranes with a life expectancy of 30-35 years, verified by independent assessment. Enhanced performance properties include flexibility, excellent fire ratings, stronger reinforcement and ease of application.

Derbibrite, from the Derbigum family, is a revolutionary ‘cool roof’ waterproofing membrane with a highly reflective, acrylic top coat which helps reduce the urban heat island effect of buildings, lowers internal building temperatures and is formulated to allow direct bonding of photovoltaic panels.

Hydrotech is a self-healing monolithic structural waterproofing system, manufactured using up to 25% post-consumer waste. It has a proven track record for use on protected roofs, plaza decks, green roofs, water features or access roadways. Hydrotech is fully warranted, BBA approved and has European Technical Approval ETA-05/0152.

External wall insulation systems

Alumasc’s BBA approved, fully warranted external wall insulation systems are available with a choice of insulating material and render facings. The range of available finishes includes silicone renders, polymer-modified renders and brick slip systems.

Cork panels can be used within external wall insulation systems to provide a natural insulator that contributes to a high performance façade. Cork has the lowest embodied energy of all commonly used insulation materials and has an A rating in the Green Guide to Specification for maximum benefit in BREEAM and Code for Sustainable Homes assessments.

Sustainable building exterior systems

Alumasc pursues sustainability throughout its full range of products and services via accreditation to the ISO 14001:2004 environmental management standard.

Alumasc operates a quality management system, independently audited to BS EN ISO 9001:2000.

Individual products and systems are certified by the British Board of Agrément and where appropriate have equivalent European/US accreditation.