Aircrete, the generic term for cellular concrete, was conceived as a sustainable product nearly 100 years ago.

Pulverised Fuel Ash (PFA) accounts for up to 80% of the material used in the manufacture of H+H Aircrete. As a by-product of coal-fired power stations, most of this material would otherwise be sent for landfill; we have provided a way for this otherwise useless product to make a positive contribution.  

The creation of fresh PFA is reducing as we decommission our coal-fired power stations. However, a century of energy generation has produced huge stockpiles of PFA. At H+H we have modified our manufacturing processes to enable us to capitalise on this resource of stockpiled PFA and are confident in our ability to use these reserves for decades to come.

In addition, waste aircrete generated from the manufacturing process is recycled as an aggregate back into the process, allowing this product too, a new lease of life. 

Once manufactured, aircrete won’t rot or burn, is resistant to sulfates and the effects of freeze/thaw cycles and cannot be attacked by pests such as termites or vermin. Should an aircrete building reach the end of is useful life the aircrete blocks can be crushed and used as an inert aggregate for a variety of construction processes.

The characteristic lightweight structure of aircrete, with its air pockets captured within the blocks, is created through a chemical reaction during manufacturing.  The catalyst for this process is aluminium and H+H uses recycled aluminium powder to achieve this reaction. 

Not surprisingly, H+H is also a supporter of local sourcing. Reducing the miles that any product needs to travel from its source to its end use should always be part of the environmental calculation. With factories in the North and South of England, we provide local supplies direct to site.

And we extend our environmental focus to our product packaging, with fully recyclable wrapping and a pallet recycling service operated through Scott Group plc, we aim to support a zero waste to landfill ambition for our customers.