What are Aircrete
Thermal Blocks

Lightweight thermal blocks

manufactured from autoclaved aerated concrete (AAC).

A precise blend of raw materials

creating a chemical reaction which creates a mico-cellular structure giving aircrete blocks their unique thermal and lightweight properties.

Quinn Lite Aircrete Blocks

A complex manufacturing process

that requires a unique blend of raw ingredients in a carefully controlled environment.

Aircrete Thermal Blocks

Manufactured using up to 80% recycled materials, making it a very sustainable construction product.

Insulates up to 10x better than dense concrete blocks.

Up to 750% better PSI values than a dense concrete block.

Locally sourced

Locally sourced

raw materials

Best in Ireland

for combined thermal performance and strength

Improve U-Value

overall of your build and reduce heat loss

How Mannok Aircrete Thermal Blocks are made

Step one

Creating the mix

Exact quantities

of raw materials including cement, pulverised fly ash (PFA), silt, sand, aluminium and lime are blended together to create a wet mix.


The mixture is poured into large oiled moulds and vibrated to remove excess air bubbles.

Step two


The mould is transferred to a pre-curing chamber, where it remains for a period of 2-2.5 hours at 36°C – 40°C.

A chemical reaction takes place between the aluminium and the lime releasing gases which fills the mixture with millions of tiny air pockets, causing the mix to rise and giving the block its lightweight and thermal properties.

The now solid mixture is removed from the mould and tilted before individual blocks are cut using piano wires. Excess material is recycled for use in the next mix to minimise waste.

Step three

Steam curing

The cake is steam cured in an autoclave for 12 hours in a very controlled environment. The temperature increases slowly, is held at 180°C for several hours, before gradually declining. Unlike dense or lightweight aggregate blocks which take up to 28 days to reach full strength, Mannok’s aircrete thermal blocks achieve full design strength during this autoclaving process.

Blocks are separated and packaged, with samples from every batch undergoing multiple tests over 48 hours to ensure strength and thermal properties meet their specific requirements.


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