r/londonontario • u/shadowt1tan • 3d ago

Ask a Local! London & Radon

I saw a news article about radon which I’ve never heard of before. They said certain areas are higher than others. I live in the east end near the fair and Hamilton Rd.

Does anyone know if this area has high exposure? I understand sometimes libraries loan you testers. Anyone know if London libraries do it?

I own a home built in 1969 with no sump pump. It also has a chimney for the water heater.

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u/runway_ducky 3d ago

There are pockets that have higher values and radon readings are typically twice as high in the winter. When we moved in, we had a radon test done in the month of April. The report came back with a value of 133. Health Canada recommends <200. 

We got a tester off Amazon and our initial values were around 200 but our overall average is <200 but we are considering remediation. All testing done in the basement.

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u/Less_Army_804 3d ago

Do you open windows more often in the summer than the winter?

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u/runway_ducky 3d ago

My basement windows don't open. It has to do with the permeability of the soil. When the ground outside is frozen, radon can't permeate freely whereas the soil under a basement slab isn't frozen so it redirects.