Concrete slabs are used beneath homes, sheds, garages, commercial buildings, basements, balconies, roof decks, patios, and occupied spaces. Although concrete is strong and durable, it is not automatically waterproof. A concrete slab contains pores and capillary pathways that can allow water or moisture vapor to move through the material.

A swimming pool constantly holds thousands of gallons of water against concrete, mortar, masonry, joints, penetrations, and interior finishes. Even a small crack, poorly sealed fitting, or weak construction joint can allow water to escape from the pool or enter the structure from the surrounding soil. That is why pool waterproofing should be planned as a complete system rather than treated as a single coating applied over the visible surface.

Balconies, concrete decks, roof decks, terraces, and elevated walkways are constantly exposed to rain, sunlight, temperature changes, foot traffic, and standing water. Although concrete is strong and durable, it is not automatically waterproof. Concrete contains microscopic pores that can absorb moisture.

Water can enter a building through its roof, exterior walls, foundation, floor slab, windows, joints, balconies, and underground structures. In some cases, the source is easy to find. In others, water travels through concrete, insulation, wall cavities, or structural components before appearing far away from the original leak.

A concrete roof may appear solid and durable, but concrete is not naturally waterproof. It contains pores, capillary pathways, joints, and possible cracks that can allow rainwater to enter the roof assembly and eventually reach the building below. Flat and low-slope concrete roofs face an additional challenge because water may drain slowly or collect in low areas.

Driveways, patios, and sidewalks face some of the harshest conditions around a property. These exterior concrete surfaces are exposed to rain, sunlight, temperature changes, vehicle traffic, foot traffic, dirt, oil, chemicals, and standing water. Although concrete is strong, it is not naturally waterproof.