Drummondville sits on the St. Lawrence Lowlands at roughly 90 m elevation, underlain by marine clay deposits left by the Champlain Sea. That clay shrinks when dry and can crack, which makes geomembrane specification a critical step for any environmental containment project in the region. We work with project owners to define the correct polymer type, thickness, and textured surface required to seal against the underlying soil. Before specifying the geomembrane, we often run a permeability field test to measure hydraulic conductivity of the subgrade and a plate load test to confirm bearing capacity under the liner — both feed directly into the design parameters of the barrier system.
A geomembrane specified without freeze-thaw data from the subgrade can develop stress cracks in the first winter — we verify the clay behavior before sealing it.