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Radon radiation by decontamination experts from Polygon.

Radon remediation

Detect and reduce dangerous gas levels with radon measurement and mitigation, ensuring safe, compliant indoor air.

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Start / Services / Decontamination services / Radon remediation

Ensuring safe indoor air when radon is a concern

Radon is a naturally occurring radioactive gas that comes from the decay of radium in soil, rock, water, and some building materials. Outdoors it dissipates, but indoors it can build up to harmful levels. Because radon is colourless, odourless, and tasteless, the only way to know your exposure is by measurement. High radon levels are the second leading cause of lung cancer after smoking.

We offer expert radon measurement, investigation, and mitigation services. From homes to workplaces, schools to public buildings, we have certified experts, precise equipment, and proven methods to assess risk, identify entry points, and reduce radon to safe levels.

Why choose us

  • Certified measurement – Devices and processes that meet national regulatory standards
  • Health & safety focus – Reducing risk to occupants and helping meet legal obligations
  • Clear, actionable reports – You get data and options, not just numbers
  • Practical mitigation – Solutions suited to your building and budget
  • Transparent compliance – We help you stay aligned with reference levels and regulations
  • Responsive service – Fast measurement and mitigation to reduce exposure quickly

Use cases

  • Homes – Basements, ground floors, or properties with poor foundation sealing or air tightness
  • Schools & childcare – Environments where people spend long periods indoors, especially during colder months
  • Workplaces & public buildings – Offices, community centres, care homes, hospitals etc.
  • New constructions & renovations – Buildings in radon-prone areas or renovations that affect foundations or ventilation
  • Historic or old buildings – Older structures built with materials or foundations that allow radon infiltration

The process

1

Measurement & inventory

We perform radon tests using correct devices; long-term measurements during the heating season for reliable results, or indication tests where needed.

2

Assessment & diagnosis

Analyse measured levels; identify where radon is entering the building (gaps, cracks, foundation, water or building materials).

3

Reporting & recommendation

We deliver a clear, written report with measured results, comparison against reference levels (e.g. 200 Bq/m³ or local regulatory limit), and practical mitigation options.

4

Mitigation planning & execution

We may seal entry points, improve ventilation, or install a radon sump or radon extraction system depending on what the building requires.

5

Follow-up & verification

After mitigation, we re-measure to verify effectiveness, ensure levels are safe and provide documentation.

Talk with an expert

Frequently asked questions

When should I test for radon?

If your building is in a radon-prone area, has a basement or ground floor, poor sealing or ventilation, or when you suspect elevated levels. Best measured over the heating season for accuracy.

What are safe radon levels?

Reference limits vary by country, but many authorities use ~200 Bq/m³ for living spaces. Any level above should be assessed and mitigated.

How long do measurements take?

Long-term measurement usually takes at least 60 days during the heating season; short-term or indication tests are shorter but less definitive.

Will mitigation completely remove radon?

While you may not eliminate radon, mitigation can reduce it to safe levels with sealing, ventilation, extraction systems and follow-up verification.

Does insurance cover radon services?

Some policies cover radon measurement and mitigation, especially for workplaces or where regulations require it. We provide documentation to support claims.

Expert and contact person at Polygon.

Get help now

Don’t wait until radon becomes a hidden risk. Contact us today for professional radon services, measurement, mitigation, and verification.

Request radon Remediation

Contact us

Head Office
Polygon International
Mäster Samuelsgatan 42
SE-111 57  Stockholm
Sweden

For general inquiries, please use this form. For local support, contact your local Polygon team.

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