Provoid

Provoid Gas Venting System consists of a 25mm geo – composite ‘void former’ that can be laid under the entire floor slab or, in strips at pre-determined centres, to suit the gas regime on site. When installed with the Provoid range of air inlets and outlets (please contact us for site – specific details), it can dilute harmful gases down to the required design concentrations for your site.

Only 25mm thick which results in less contaminated spoil to be removed compared to a 'pipe and gravel' venting layer
Flexible
Large rolls available for reduced installation times