Foundation Wall Crack Repairs
Foundation wall cracks are either vertical, horizontal or stair step, which follow the line of the CMU block. Vertical cracks can occur when the concrete shrinks or when the soil surrounding the foundation wall settles. These cracks can leak and allow substantial amounts of water to enter your basement. In order to stop the leak, vertical cracks should be repaired immediately. Our three part repair process includes a hydrophobic or water repelling high strength mortar and drainage board. Polydrain an air-gap drainage mat or an extruded plastic resin sheet, Polywall is then pinned over the mortared crack for extra protection. The drainage mat is also positioned at the cove joint over the graveled trench and up the wall to prevent any water seepage. Finally the trench area is sealed with a concrete cap.
Another Waterproofing method for poured wall cracks is polyurethane resin injections. The crack is first routed or saw-cut to clean and make sound. The injection ports are then installed in measured intervals along the full length of the crack. The crack is mortared with hydrophobic mortar and the ports are injected with a professional grade polyurethane resin, such as one manufactured by Sika. This resin expands, fills the wall crack and the hydrophobic mortar further prevents any water leakage.