ASL site investigation works include monitoring for the presence of ground gases that may pose a risk to human health within the completed development. Where such risks are identified, generally in the form of elevated concentrations of methane or carbon dioxide, gas protection measures are required. ASL provides recommendations for suitable gas protection measures based on the monitoring results. This can include specification of gas resistant membranes and design of subfloor venting.
The design and installation of gas protection measures requires verification and validation in accordance with current regulatory standards. ASL’s services extend to providing verification plans, third party visual inspections and integrity testing of installed gas membranes. ASL works in conjunction with specialist gas membrane installers to provide a comprehensive validation service for gas protection.