French drain

Before we proceed with the excavation that will allow us to install a new French drain, we will have to find the place which is most flooded with ground water. We will also need to identify if there are underground facilities, and then determine the position that the pipes will take to provide the best drainage.

We will then proceed to the excavation near the foundations. We will prepare the trench to install the French drain in perforated B.N.Q. pipes at the foot of the foundation, with ¾ net crushed stone (5-15cm). We then install the French drain and the stones, as well as a geotextile membrane that will protect it. Then we add the final fill with the existing soil. FISSURE & DRAIN LAVAL uses only top quality products to ensure the durability and efficiency of the installation.

The function of the foundation drain is to remove water pressure on the foundations. If there is an accumulation of water in the soil, pressure on the foundation is created which results in water infiltration. On the other hand, the absence of drain does not automatically create a moisture problem. Most properties do not have a functional drain and yet the problems of excessive mould in the basement remain minor. The slopes of the ground, the type of soil, the depth of the foundations, the presence of a water-repellent coating, concrete quality are each important factors that help to keep the foundations dry.