Radon testing guides

Le radon est un gaz radioactif qui se forme dans le sol quand l’uranium se dégrade. Il entre par les fissures de la fondation et les joints des tuyaux. L’isolation et une maison étanche le retiennent à l’intérieur. Des années d’exposition causent le cancer du poumon, et ce gaz reste méconnu. Utilisez la recherche pour les mots que les gens cherchent : gaz radioactif, uranium, fondation, maison étanche, cancer du poumon, becquerels.

Radon in Thunder Bay: 12% of 108 homes in the 2012 sample

Thunder Bay district was 12.0% above 200 Bq/m³, higher than Toronto’s 2.7% in the same survey.

26 oct. 2026

Radon in London, Ontario: 1.8% of 109 homes in the 2012 sample

Middlesex-London was 1.8% above 200 Bq/m³ on 109 homes, with none above 600. Windsor-Essex, same province, was 13.8%.

26 oct. 2026

Radon rough-in by province: the national code, then a local decision

The National Building Code describes gravel and a capped pipe. Each province decides when that applies. The cap is not a test.

26 oct. 2026

Basement window wells and radon: not a place to hang the detector

A leaking well can be a path from the soil. The test belongs in the room, away from the window.

26 oct. 2026

Heated floors and radon: the water pipes are in the slab

In-floor heat does not remove radon. Anyone who drills the slab needs the tube layout.

26 oct. 2026

Radon in an old house: age does not predict the number

A stone foundation can let gas in. A new tight house can hold it. Both get a test.

26 oct. 2026

Radon after a basement flood: retest when the room is lived in again

Water can open the sump, crack the joint or change the soil under the slab. The old report describes a different house.

26 oct. 2026

While you wait for radon mitigation

An open window for an hour does not make a winter average. Spending less time in the highest room does, until the fan is in.

26 oct. 2026

How long radon mitigation takes

A straightforward house is often one day on site. The roof path and a second suction point take longer.

26 oct. 2026

How to check a C-NRPP radon certification

Canada’s program certifies measurement and mitigation separately. A logo on a truck is not the registry.

26 oct. 2026

Home inspector radon test: 48 hours is a screen

An inspection sees the house in a day. The 200 guideline is judged over at least three months.

26 oct. 2026

Radon test before closing: the offer is not 91 days long

A 4-day test can fit a condition. It does not replace the heating-season average once you own the house.

26 oct. 2026

Chargement