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French drain installation

French drain Installation

The French drain or foundation drain is a pipe installed at the base of the foundations and whose role is to control the level of the ground water equally. This is a drainage system that channels and discharges water under the basement floor, thus protecting the structure from water infiltration from hydrostatic pressure. The pipe around the perimeter of the foundation circulates the accumulated water to a ditch or catchment area that will then be pumped or evacuated by gravity to a municipal system.

Why a French drain?

French drain, an increasingly well-known word in the field of construction. Unfortunately neglected by the majority of new home builders, the drainage system is a much needed protection for your foundations.

A poorly installed or crushed French drain can cause severe damage to your building as a failing drainage system causes a high moisture level in the basement. The appearance of mould is often the result of a defective French drain.

Signs that your French drain needs to be replaced

When the French drain fails, several signs can be identified as indicators. The most common index is often the increase in humidity in the basement. While moisture can be dissipated with appliances, it is still very likely that the foundation of your home is cracked or that the French drain is missing. Rapid intervention is therefore necessary.

Suspicious odours or stains from fungi or moulds on the walls, the efflorescence of the concrete, and the appearance of several cracks in the foundation are also other indicators that the French drain may be lacking.

Terra Cota

Until the 1960s, French terracotta drains were installed. The principle was rather rudimentary but still worked for several years. Most of these drains now need to be replaced as they are often not covered with a large enough layer of crushed stone and do not have a system to prevent the roots or soil from entering them. Thousands of homes in Quebec have this drainage system around their foundations and these owners realize that the system is failing the day they open walls in the basement and see the presence of mould and efflorescence.

We offer the service of inspection of these drains. Often in order to have a clean core when the drain is Terra Cota type, we need to dig for access since these drains are gravity connected to the sewer and have no access from the inside.

Agricultural drain (Big O)

For several decades the agricultural drain was the only and only material used. Many entrepreneurs still use this equipment, but the techniques have evolved considerably since then. The advantage of this drain compared to the Terra Cota is that it has more holes and therefore lets the water penetrate much more easily. Some agricultural drains are coated with geotextile.

This type of drain has been installed extensively in the last decade. This drain was revolutionary when it appeared on the market but the industry quickly realized that this geotextile coating finished mainly by creating a barrier preventing water from entering the drain ESPECIALLY in the presence of iron ochre. When we replace a French drain, we do not use this equipment. Being flexible, it often causes ups and downs on the perimeter of buildings causing water retentions.

BNQ drain type

This drain is basically the same drain that is used to make sewers. Being much more resistant and smooth than an Agricultural Drain, this drain offers a much longer lifespan and eliminates the risk of having ups and downs by installing it with a laser. Being perforated all around and having joints that unite lengths of more than 3 inches, it provides strength and performance beyond industry standards.

Since it is entirely made of plastic, its interior as well as the exterior is thus smooth. When the time comes to clean it, it becomes effective again as in its new state. It therefore makes it possible to control the level of the groundwater more consistently and efficiently.

"We consider that the BNQ Type Drain has far surpassed all its competitors and that is why we are installing it."

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