Exterior Waterproofing
Exterior waterproofing protects wall assemblies from moisture intrusion that originates outside the building. When exterior barriers fail, dampness can migrate through penetrations toward interior spaces. This is especially risky near bathrooms, where a bathroom storage cabinet sits close to the wall.
Common systems include sheet membranes, liquid-applied membranes, cementitious coatings, and drainage planes. The choice depends on climate, substrate, and risk level. This approach reduces the risk of moisture reaching a bathroom storage cabinet behind the wall.
Drainage and Joints
Water management hinges on how joints, flashing, and seals are detailed along walls, windows, and balconies. In bathrooms, the wall behind a cabinet should have proper flashing and a continuous water barrier. Poor detailing can lead to hidden leaks that threaten interior finishes and the bathroom storage cabinet.
Install drainage channels or a solid drainage plane to guide water away from the building envelope. Ensure expansion joints accommodate movement without creating gaps for water ingress. Regular inspection helps detect wear before a drip becomes a problem for interior cabinetry.
Cabinet Moisture Risk
Humidity and splashes in bathrooms can interact with wall assemblies that are not fully protected. If exterior moisture breaches a wall, studs and insulation can saturate, risking mold and warped shelves in a bathroom storage cabinet. Even with indoor humidity control, external leaks pose a risk to nearby cabinetry.
Select moisture-resistant cabinet materials such as marine plywood, phenolic faced boards, or PVC. Create a small air gap behind the cabinet to reduce moisture transfer. Install proper ventilation and maintain humidity to protect both cabinets and walls.