Alumasc Exterior Building Products Ltd

White House Works
Bold Road
St Helens
United Kingdom
T: +44 (0) 1744 648400
View Website

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 -

Harmer Drainage Systems -

Alumasc Insulated Renders -

Blackdown Greenroofs -

Roof-Pro -

Alumasc Water Management Solutions -

Alumasc Rainwater -


Alumasc’s Blackdown provides a ‘living’ roof for...

An Alumasc Blackdown green roof system installed at Chester’s new £13.5 million bus station is improving air quality and biodiversity at the new bus interchange, which is part of the £300m Chester Northgate Redevelopment.Lakesmere Project Manager... Read More

Alumasc waterproofing system protects treatment centre

The prestigious new Banbridge Community Treatment & Care Centre (CT&CC) in County Down, Northern Ireland, has an effective long-term water-proofing solution, after 2,500m2 of Alumasc’s Hydrotech waterproofing systems, covered by Intensive Alumasc... Read More

When a ‘1 in 100 a year’ risk means catastrophic...

Alumasc WMS MD Steve Durdant-Hollamby wants the construction industry to come together to lobby the Government about the impact of climate change:"Storm Angus, the first of this winter’s storms, dumped a month’s rain in a few hours and submerged... Read More


  Aluminium, Cast Iron & Steel Rainwater Systems Brochure

Aluminium, Cast Ir...

By Alumasc Rainwater

ROOF-PRO Systems Brochure

ROOF-PRO Systems

By Roof-Pro

Harmer SML Soil & Waste Drainage Brochure

Harmer SML Soil & Wa...

By Harmer Drainage Systems

SML Below Ground Overview Brochure Brochure

SML Below Ground Ove...

By Harmer Drainage Systems


Large Unit Supports

By Roof-Pro

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

Pipe and Duct Supports

By Roof-Pro

Secure and stable support solutions for all types...

Mineral render

By Alumasc Insulated Renders

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