The lightweight block weight helps to build robust structures while keeping the overall weight of the building relatively lower than traditional brick-built structures. This is the reason why it is becoming increasingly popular among property owners in Bangladesh.

Lightweight concrete blocks are manufactured from cement together with one of a variety of natural or man-made expanded aggregates including: granulated / foamed blast-furnace slag, expanded clay or shale, furnace bottom ash (FBA), pulverised fuel ash (PFA) and the less common pumice (a volcanic material).

These aggregates give lightweight blocks their low unit weight, making them easy to handle and enabling time and material savings through easier handling and larger units. They are commonly used for interior walls or as infill blocks in beam and block flooring to provide a higher level of insulation.

Besides their insulating properties, these units also offer high fire resistance and sound reduction. They can be installed using thin-set adhesive.

Cinder blocks are the most common of the lightweight concrete block types, but they come in a variety of shapes and sizes. Originally made from waste coal and steel ash from power plants, they are now usually made from other types of sand and aggregate.

A lighter cinder block can be up to 10-pounds lighter than a standard concrete block of similar dimensions and shape, which makes them easier for masons to lift and carry during brick-laying work. This is a plus for construction companies that want to minimize the risk of low back injuries that can result from heavy lifting.