Radon is a natural gas and one of the main causes of lung cancer in non-smokers.According to the WHO, radon is the number 2 cause of cancer - after tobacco
Building professionals need to be informed about the risks and protective measures.
As there is no central reference document for radon prevention and remediation, the Centro competenze radon (CCR) at SUPSI has produced a technical guide.
The measures proposed in the SUPSI document, combined with the Stop Silent SL13 backflow flap, result in an effective protection concept.Prevention of new buildings: (Text passage from the SUPSI collection)
Ensuring the long-term protection of the building:
Pouring a radon-tight floor slab and precisely sealing the floor penetrations.
If the floor slab is radon-tight, the pipe shafts must also be sealed. The Stop Silent SL13 backflow flap ensures this.
Radon remediation:(Text passage from the SUPSI collection)
Reduce the penetration of radon-containing air into the building
Sealing the lead-through of pipes via the floor, floor drain
The Stop Silent SL13 backflow flap can be retrofitted in the pipes without structural measures.
Building refurbishment is mandatory as soon as the measurement limit of 1000 bq/m3 is exceeded.
Recommendation for installing a non-return valve (excerpt from the SUPSI document Radon remediation R2 (page 43)Tight floor drain
Floor drains can be entry routes for radon ingress if the pipes contain contaminated air and the siphon is dry.
It is also recommended to install a non-return valve that closes gas-tight, even if no water is present. The Stop Silent SL13 non-return valve is such a valve.
Useful links on the subject of radonRadon Video UKEuropean Radon Association