The most important things first
Radon is a natural gas and according to WHO the second leading cause of cancer after tobacco. In the building, protection mainly comes from a combination of tight construction, cleanly sealed penetrations, and an appropriate backflow preventer. For new and existing buildings, the SUPSI document lists concrete measures that can be complemented by the Stop Silent SL13 backflow preventer.
At Lasso Technik AG we do not see the topic as theory but as part of a functioning protection concept in construction. Especially where pipes, floor drains or duct shafts create weak points, the combination of construction sealing and technical backflow protection is decisive.
Why is Radon protection in buildings so important?
Radon is a natural gas and one of the main causes of lung cancer in non-smokers. The text refers to the WHO statement that radon is the second leading cause of cancer after tobacco. This is exactly why construction professionals must know the risks and protective measures.
What measures does SUPSI name for new construction and renovation?
| Use case | Measure | Goal |
|---|---|---|
| Prevention of new buildings | Radon-tight floor slab and precise sealing of floor penetrations | Ensure long-term protection of the building |
| Prevention of new buildings | Seal conduits as well when the floor slab is radon-tight | Close entry paths via installations |
| Radon remediation | Reduce ingress of radon-containing air and seal conduits and floor drains | Reduce radon in existing buildings |
| Radon remediation | Install Stop Silent SL13 retrofitting in pipes | Provide additional protection without structural measures |
Contrary to the assumption that Radon protection is only an issue for new buildings, the text also mentions a retrofitting solution for existing buildings. The Stop Silent SL13 backflow preventer can be installed in pipes without structural work. In practice, this is often the crucial difference between a theoretical recommendation and a feasible remediation.
How do floor drains become weak points?
According to the SUPSI excerpt, floor drains can be entry paths for radon if the pipes contain contaminated air and the siphon is dry. Therefore, it is recommended to install a backflow valve that seals gas-tight even without water. The Stop Silent SL13 is described in the text as such a valve.
- Floor drains can become entry paths for radon when the siphon is dry and the pipe air is contaminated.
- A gas-tight backflow valve protects even when no water is present.
- The Stop Silent SL13 is explicitly named in the document as the suitable solution.
SUPSI / BAG / WHO im vorliegenden Text
What to watch for in implementation
The text makes clear that not only sealing itself counts but also transitions: penetrations, duct shafts and floor drains. If you leave these points open, you create new entry paths for radon-laden air. For planning, the interaction of construction sealing and gas-tight backflow valve is central.
What should construction professionals and owners know now?
The text is clearly aimed at construction professionals, but the implication also affects owners: those who ignore measurement values or overlook weak points at floor drains and pipes risk unnecessary burdens in the building. For implementation, the article points to SUPSI, BAG, Suva and other information sources on the topic of Radon.
Frequently asked questions
When is remediation required for Radon?
Can Stop Silent SL13 be installed retroactively?
What role does a dry siphon play in floor drains?
Does radon protection apply only to new buildings?
Effective radon protection in buildings therefore requires more than a single solution; it requires a coordinated approach. This is exactly where the Stop Silent SL13 backflow preventer, in conjunction with the measures from the SUPSI document, comes into play. Those who take radon seriously plan sealing and backflow protection together.
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Lasso Technik AG, Basel