Alumasc Exterior Building Products are a major UK supplier of premium construction products and brands. Alumasc Rainwater Systems are a leading manufacturer of BBA certified architectural aluminium rainwater goods. A complete range of aluminium gutters, downpipes and integrated fascia soffits. Alumasc Rainwater also supply cast iron rainwater pipes and gutters for historic and restoration sites, with bespoke designs available to match or replace existing installations. Alumasc are suppliers of Harmer drainage systems that include roof outlets and below ground drainage. For internal drainage, Harmer provide cast iron soil and waste systems, floor drains, shower drains and wetrooms. Alumasc also provide world class BBA certified waterproofing and green roofing systems. Included in the range are Derbigum flat roofing membranes, Hydrotech structural waterproofing and ZinCo green roofs. Also BBA Certified is Alumasc's specialist thermally efficient, insulated render systems which utilise a wide range of silicone, mineral and polymer-modified decorative render finishes.

Mayplas manufacture extensive ranges of fire barriers for cavities and voids. Thermal insulation for floors, walls and roofs and acoustic insulation for suspended ceilings, floors, walls and metal profiled roofing. Many of our cavity closers and cavity barriers combine fire stopping, acoustic and thermal insulation in a single product. Mayplas range of products are designed to assist architects and building contractors to meet all aspects of the UK Building Regulations Part L (Conservation of Fuel and Power), Part E (Resistance to Sound) and Part B (Fire Safety).

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