For many years a trench has been filled with unsustainable wet
concrete. Today we have other options for constructing foundations;
options which perform better thermally, are produced from recycled
materials and are less harmful to the environment. Foundation
blocks offer excellent thermal performance and save time and
Research by leading surveyors Davis Langdon LLP has shown that
constructing a foundation with aircrete foundation blocks is up to
24% cheaper than cavity aggregate block foundations.
They also reduce ground floor heat loss by up to 25%, therefore
reducing the need for additional floor insulation.
Foundation blocks are made from aircrete (also known as
Autoclaved Aerated Concrete, AAC). Aircrete is one of the lightest
forms of concrete, yet it is fully load-bearing with a range of
block strengths available up to 8.7N/mm2.
Below ground level, aircrete blocks are resistant to sulphate
attack and frost damage, which means they can be used where other
masonry types are unsuitable. They also have third party
certification for use below the damp proof course (DPC) level in
Aircrete blocks are fully certified for use in both the outer
and inner leaf of cavity constructions, as well as solid
foundations in sulphate bearing soils and groundwater Classes DS-1,
2, 3 and 4. This means that aircrete can be used in ground
conditions which could be permanently saturated.
Aircrete blocks also provide sound insulation performance that
is equivalent to much heavier blocks of the same thickness and are
fully compliant for use under the Robust Details scheme.
One aircrete foundation block replaces two 100mm concrete
blocks, which means that the laying rate is twice as fast. Trenches
can be backfilled as soon as installation is complete. These blocks
have impressive load-bearing capabilities, and are also
exceptionally resistant to freeze/thaw conditions. Aircrete blocks
are the only material that can be used with the thin jointing
method. For further information on this method speak to your local
- Aircrete blocks are easy to use and can be cut using simple
- Being up to a third of the weight of dense aggregate concrete
blocks, aircrete blocks are easier to handle.
- Ordering wet mixers with timed deliveries doesn't always run
efficiently. Having blocks on site ready to work means no
- Aircrete block foundations can reduce your ground floor heat
loss by up to 25%.
- Aircrete blocks provide great sound insulation
Jewson has everything you'll need...
- Delivery Service; The majority of our transport fleet have
crane off-load lorries to deliver direct to your site, in most
cases within 24 hours.
- Products; Jewson carry a large range of aircrete blocks to suit
all uses. Blocks are made with up to 80% recycled material.
- Tool Hire; Jewson
Tool Hire branches provide a large range of equipment to
suit all projects.