Product / system supply
Newton PAC, Newton 508 membrane
The owner of a picturesque listed property in Derbyshire wanted to upgrade the basement into a dry habitable area. Knowing that the house was in a high risk Radon gas area, the project required gas remediation and structural waterproofing as a package to obtain habitable living.
Preliminary tests for Radon showed startling results, with the basement area at over 5,000 becharels, 4,800 above 200bqm which is considered the action level for remediation in domestic properties.
The owner contacted specialist gas remediation experts Prestige Air who recommend that the Newton PAC “Positive Air Curtain” be installed to deal with the Radon but also the basement waterproofing combined.
Prestige Air contacted Newton Specialist Basement Contractor Protectahome to perform the installation of the Newton System 500 cavity drain waterproofing and Prestige Air installed the “Positive Air Curtain”.
To ascertain the real time Radon levels, Prestige Air installed a continuous Radon monitor to the basement which data logs Radon levels throughout the project, and to give guidance about the amount of air management required within the Newton PAC system to treat the problem.
The first component of the PAC installed was an air duct fixed at joist height around the entire retaining aspects of the basement. The air duct contains pressure control bladders internally and air delivery points drilled into the bottom of the duct as a means of delivering an even air curtain down behind the Newton 508 cavity drain membrane, which was "curtain hung" at a high level to ensure minimal penetrations.
The 508 membrane was installed with Newton MultiPlugs that were sealed with Newton WaterSeal butyl rope. Once the membrane was fixed to the retaining walls, the MultiPlugs were double sealed with the Newton Overtape to provide a seal to prevent gas leakage through the fixings, all membrane joints and the seal to the PAC duct.
Newton Basedrain was installed on top of the slab, which guided waste water to a Titan Pro Sump and Pump installed to deal with the water removal from the basement.
Once the Newton PAC system was installed, Prestige Air then performed their patented gas integrity testing process to the system, which ensured that all defects in the sealing of the membrane were identified and re-sealed and re-tested.
The results with the Newton PAC installed were remarkable – Radon levels were now down from 5000 bqm to less than 100 bqm.
“Having carried out a series of Radon monitoring it was established that we had levels up to 5000 bqm within our basement of our home. In addition to this our basement was also damp. After failing to get levels down to acceptable levels by using a standard type retrospective sump, Prestige Air and Protectahome jointly installed the Newton PAC system for both Radon and waterproofing. We now enjoy a dry basement with levels of Radon less than 100bqm.” – Mr Read, Derbyshire