Granite countertops and radon: the soil under the house matters more
Test the lowest lived-in room. Do not start by tearing out the kitchen.
25 oct. 2026
Radon testing guides
118 articles
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 well water: a secondary path, with a 2,000 Bq/L cue
Drinking it is not the main risk. Showering it into the air matters more, and soil gas still comes first.
25 oct. 2026
Radon in a basement apartment: the bedroom closest to the soil
Ask in writing. The person who controls the building controls the repair.
25 oct. 2026
Which apartment floor to test for radon
The neighbour upstairs is not your unit. The condo board does not replace the bedroom test.
25 oct. 2026
Radon on the second floor: it usually falls as you go up
Testing only the upstairs living room misses the basement bedroom.
25 oct. 2026
Sump pit and radon: an open hole at the low point of the slab
Health Canada excludes the sump as a test location because the number there is not the room.
25 oct. 2026
Sealing cracks will not fix radon
Sealant helps a mitigation system. Alone, it is not a result under 200.
25 oct. 2026
Energy retrofits can raise radon
The sealant did not create radon. The house keeps it.
25 oct. 2026
Radon in a cottage or cabin: test the season you actually sleep there
An annual average for a year-round house is not the instruction sheet for a cabin.
25 oct. 2026
Testing for radon in summer: open windows, a low number
Summer can answer a deadline. It does not replace a heating-season test.
25 oct. 2026
Where not to place a radon detector
The number has to describe a room used more than four hours a day.
25 oct. 2026
Closed-house conditions for a radon test
Opening the house “so the test is fair” lowers the number and misses the exposure.
25 oct. 2026
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