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Last Updated: , Created: Friday, December 9th, 2016

Iron Ochre

Iron ochre is a rust coloured sludge that accumulates and clogges perimiter drains in certain soils.  It is often found the Eastern Townships of Quebec.  It is a very complex problem which can be controlled but not solved.  In fact the real solution in regions known to have iron ochre is to not build a basement but build on a slab-on-grade to avoid deep drainage tiles altogether. 

I will not go into detail here because the best information available is on the Régie du bâtiment du Québec web site -- in both English and French.  Follow this link:


Keywords: Drainage, Clogging, Soil, Rust, Foundation, Iron Ochre, Drains, Basement, Problems

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