Is your foundation drain clogged or not draining properly?
The result can be water infiltration and mold in your basement. At SOS Sous-sol, we specialize in professional French drain cleaning—an essential step to protect the long-term durability of your foundation in Montreal, Laval, the North Shore, the Laurentians, and Lanaudière.
Why Clean a Foundation Drain?
Your French drain is your home’s first line of defense against groundwater. Over time, it can become clogged by:
- Soil, sand, or clay
- Tree roots
- Iron ochre (orange sludge)
- Construction debris or partial collapse (in which case, we can perform targeted repairs)
A blocked drain creates hydrostatic pressure against your foundation, which can cause cracks, water infiltration, or mold growth in the basement.
Signs of a Clogged Drain
- Standing water in the sump basin
- Cracks in the foundation or slab
- Persistent dampness at the base of basement walls
- Mold or unpleasant odors
- Efflorescence lines (white powder) at the bottom of the foundation
- High humidity levels in the basement
A drain camera inspection is often required to confirm the condition of the drain and pinpoint the blockage.

Our Drain Cleaning Service
Camera Inspection Included

At SOS Sous-sol, drain cleaning is never complete without a camera inspection after high-pressure jetting.
Many companies stop at the high-pressure cleaning and leave the site—without giving the homeowner proof that the drain is truly clear and water is flowing properly. The problem often comes back.
SOS Sous-sol goes further:
- Camera inspection before cleaning – to assess the drain’s condition and choose the right technique and equipment.
- High-pressure jetting – for a complete and safe cleaning of the drain.
- Camera inspection after cleaning – to confirm the results.
- Video proof provided to the client – full transparency and peace of mind.
This verification step makes all the difference.
It proves that the drain is working as intended and protects you from unpleasant surprises.
Mirabel
Saint-Eustache
Rosemère
Saint-Jérôme
Sainte-Marthe-sur-le-Lac
Blainville
Boisbriand
Sainte-Thérèse
Deux-Montagnes
Laval
Lanaudière
Montreal’s North Shore

Why It’s Essential
- A drain may look clean after jetting because the water passes through—but it can remain partially blocked by soil, roots, iron ochre, or hidden deposits.
- Without visual proof, you can’t know if water is truly flowing properly.
- A camera inspection ensures you get real value for your investment and that your home is genuinely protected.
The SOS Sous-sol drain cleaning service with included camera inspection ensures proven results.

Why Choose SOS Sous-sol?

Request an Inspection Now!
If you suspect a problem with iron ochre, don’t wait until it’s too late. Contact us today for a professional inspection.
Get an estimate or a complete health check of your French drain.
FAQ About Drain Cleaning
About 2 to 4 hours, depending on the drain’s condition, length, and accessibility.
Yes, but in most cases, excavation is recommended to ensure full access to the entire drain.
Yes, if the clog was the cause. Otherwise, targeted repairs may be suggested following the inspection.