About us

Lytag® lightweight aggregate was first manufactured in 1958 following a research project between John Laing Ltd and the Building Research Establishment (BRE) to develop a lightweight aggregate from power station fly ash.

Since then over 16 million tonnes have been sold worldwide and 2013 saw the completion of a multimillion pound factory at Drax power station near York.

 What is Lytag

Lytag is made from the fly ash, a by product of coal fired power stations. Our proprietary technology transforms the fly ash into small round pellets, which are then heated to 1,100°C. This creates a very hard pellet with a honeycombed internal structure of interconnecting spaces. These hard pellets can then be used as a superior, consistent, lightweight aggregate which is up to 50% lighter than natural aggregate.

On time delivery of our products to our customers’ sites is critical for the continued success of our business. To find out more on our logistics.


Uses of Lytag

Lytag is used in various construction applications such as concrete, fill, precast, drainage and screed.


Lytag is an Aggregate Industries business and benefits from the resources and capabilities of a highly skilled research and development team, as well as the financial and global business strength of its holding company Holcim. 

Your details
Please upload a .doc or .pdf file.
One file only.
64 MB limit.
Allowed types: pdf, doc.
Project address
Your enquiry