Iron ochre
Iron ochre first started causing damage to Quebec homes 25 years ago. The iron found in soil oxidises when it comes into contact with water and the process accelerates when oxygen is present, eventually turning it into iron hydroxide mud. There are two kinds of ochre: bacterial ochre that forms in sandy soils, and chemical ochre that is found in clayey or organic soils.
If you observe one or more of the following:
- The humidity level of your basement increases abnormally
- Water infiltrations
- Orange, gel-like deposits in your catchment area
- Orange stains on your slab
You may be affected by iron ochre
If your land is affected by iron ochre, you will not be able to eliminate it, but you must take preventive or corrective measures as water is no longer being effectively drained from around your home, which may result in severe damage.
There are several solutions possible:
- Unclogging, cleaning or replacement of French drains
- Installation of an interior or exterior French drain, as needed, especially designed for this type of problem
- Installation of inspection nipples for future cleaning operations
- Creation of a waterproof casing around the foundation
- Filling the basement with granular materials