Blockwork

Internal wall construction using concrete or aerated autoclaved concrete (AAC) blocks, commonly 440 × 215 mm. Dense concrete blocks offer high compressive strength and are used in load-bearing walls and below damp proof course. Lightweight aerated blocks (e.g. Aircrete, Thermalite) offer better thermal performance and are easier to cut and handle, making them popular for inner leaves of cavity walls and non-load-bearing partitions.