About Lytag

Who are Lytag?

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. 2013 saw the completion of a multimillion pound factory at Drax power station near York.

Located at Drax power station, a new Lytag® factory was opened in 2013
Located at Drax power station, a new Lytag® factory was opened in 2013

What is Lytag®?

Lytag® is made from the fly ash generated by 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.


Lytag® pellets are created in a range of size grades from 14mm down to fine aggregate.

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