Delta-MS Membrane

Our certified Delta-MS installation

A Delta-MS installation begins by excavating the affected perimeter down to the concrete footing. On a re-waterproofing job, we work in mini-excavation form to limit the damage to your landscaping; on new construction the perimeter is already open and the work moves faster. The wall is then pressure-washed, brushed to remove the residue of any old waterproofing, and any active cracks are sealed with polyurethane or epoxy before the membrane goes on. The concrete must be dry and dust-free at the moment of installation — that is a Dörken requirement, not a preference. On concrete-block foundations, we first apply a liquid primer coat to close up open mortar joints; on sound poured concrete, primer is not required and the membrane goes directly on the wall.

Delta-MS is installed with the dimples facing the wall, which creates the drainage space on the soil side. It is fastened mechanically with the dedicated Delta-MS fasteners, set at the top of the panel into the concrete at the spacing called out by the manufacturer. Vertical seams overlap on two rows of dimples and are sealed with the Delta-MS adhesive tape made for that purpose — not just any tape. The top edge is finished with a Delta-MS termination profile that keeps water, insects and debris from getting in behind the membrane from above. The membrane runs down to the footing and ties into the French drain: water flowing in the dimpled cavities drops straight into the perforated pipe wrapped in clean gravel and geotextile. Without that clean tie-in, the membrane loses half of its value.

Once the membrane is fastened, inspected and photographed, we backfill in compacted lifts, making sure the final grade pushes water away from the house. On jobs that call for it, we add a layer of geotextile between the membrane and the backfill to prevent fine soil particles from clogging the drainage cavities over the years — a detail many installers skip and one that weighs heavily on the real-world service life of the system. Every step is documented: before-and-after photos, product spec sheets, Dörken compliance certificates. You receive a written workmanship warranty from Imperméabilisation GSV and keep the Dörken 25-year manufacturer warranty against root puncture. Our RBQ, APCHQ, RECQ, Réno-Maître and Delta-MS certifications are all current and verifiable online. That combination — premium product, certified installation per the manufacturer's spec sheet, and a traceable written warranty — is what separates a proper Delta-MS job from a membrane slapped on quickly that will not deliver on its promises.