Alumasc Exterior Building Products Ltd

White House Works
Bold Road
St Helens
United Kingdom
T: +44 (0) 1744 648400
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Alumasc Exterior Building Products Ltd

Alumasc Exterior Building Products Ltd (Alumasc) provides premium products for building exteriors and drainage backed up with high levels of technical expertise and project support.

The company has been a major force in the UK Construction Industry for over 30 years, generating an annual turnover in excess of £26 million. During that time Alumasc products and systems have been used on some of the most prestigious buildings in all sectors, throughout the UK and Europe.

Highly regarded brands such as Apex, Harmer, Derbigum, Firestone, Hydrotech, and M.R., together with Alumasc's well known architectural rainwater range are leaders in their respective fields.

In summary, Alumasc delivers:

  • Premium Products
    A constantly evolving range of quality proven, world class products and systems - BBA certified in excess of 30 years
  • Technical Support
    Extensive technical support on an individual project basis, achieving the most effective specification solutions
  • Approved Installers
    A rigorously trained and monitored installation network for specialist systems, ensuring correct application on site
  • Extensive Warranties
    A choice of comprehensive warranties, providing lifecycle reassurance for the building client

Alumasc actively pursues sustainable building products, systems and manufacturing processes, offering specifers a wide choice of long-term solutions. The company’s commitment to making ongoing improvements is demonstrated through its accreditation to the ISO14001:2004 Environmental Management Standard.


Alumasc Roofing Systems

Blackdown Greenroofs

Alumasc Water Management Solutions

Alumasc Rainwater

Alumasc Facade Systems

Insulated Renders
External Wall Insulation
Ventilated Systems
Brick Slips


Alumasc: LHC’s highest-ranked flat roofing supplier

After a rigorous evaluation and selection process, Alumasc was the highest-placed flat roofing supplier appointed by LHC to the FR2 Framework Agreement. The framework, available for local authorities, social landlords and other public-sector bodies,... Read More

Alumasc Rainwater gives award winning nursery gardens a...

David Austin Roses, award winning rose growers and home of the National Rose Collection, has recently installed Alumasc Rainwater steel gutters and downpipes at its nursery tea rooms in Shrewsbury. Following a recent extension they wanted to give the... Read More

Harmer launches NEW technical brochure for Roof...

Harmer Building Drainage, part of Alumasc Water Management Solutions (AWMS), has updated its technical brochure for its innovative Roof Outlets, Roof Channel Drains and Raised Deck Supports. The comprehensive brochure is aimed at helping Architects... Read More


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Vtherm Vacuum Insula...

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Airtile Lightweight Pitched Roof Shingle Tiles Brochure

Airtile Lightweight...

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Harmer Roof Outlets Brochure 2012 Brochure

Harmer Roof Outlets...

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Roof-Pro Lightning Conductor Fixing Brochure Brochure

Roof-Pro Lightning C...

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Large Unit Supports

By Alumasc Roofing Systems

Supporting some of the largest and/or heaviest...

Pipe and Duct Supports

By Alumasc Roofing Systems

Secure and stable support solutions for all types...

Mineral render

By Alumasc Facade Systems

The ST range of thin-coat Mineral renders are used...


Alumasc: LHC’s highest-ranked flat roofing supplier

By Alumasc Roofing Systems

After a rigorous evaluation and selection process,...