Clayboard is the market leader in the void former industry since 1970s and is accredited by the British Board of Agrément since 1998. Clayboard makes unique sustainable honeycomb board solutions create a technically sound void, solving ground movement issues and prevent structural damage caused to foundations by clay heave. The honeycomb core is set between lightweight polypropylene facings and is installed on a polythene sheet in the foundation zone. Water is introduced after the concrete slab is set, which impacts the honeycomb, leaving a sound void that allows for natural ground movement to occur without exerting pressure on the ground slabs above.
Clayboard also reduces soil excavation costs. These boards create very little compression and virtually no uplift. Less reinforcement steel is required across the whole foundation site, which can be a significant further saving. Clayboard prevents structural damage to domestic and commercial buildings caused by ground movement. They are made from 100% recycled material.