Can waterproofing systems be installed on existing buildings?

Waterproofing systems can be successfully installed on existing buildings, including commercial, municipal, institutional, and condominium properties. These retrofits are an essential part of protecting structures in New England, where seasonal freeze-thaw cycles, heavy precipitation, and salt exposure can accelerate deterioration of building envelopes, causing leaks, corrosion, and structural issues over time.

The installation process begins with a thorough professional inspection and evaluation. Specialists assess the building envelope, identify sources of water intrusion or weak points, and recommend a system suited for the particular age, materials, and design of your building. For example, older masonry facades or concrete structures may require specific restoration or prep work, such as repointing joints, repairing cracks, or stabilizing substrates before installing new waterproofing systems.

There are several types of commercial waterproofing systems suitable for retrofit applications:

• Fluid-applied membranes can be installed on existing walls or roofs without major disruptions and are effective for sealing irregular surfaces typical of older buildings.
• Sheet membranes, sealants, and expansion joints are used to address penetrations, joints, and critical transition points.
• Exterior insulation and finish systems (EIFS), protective coatings, or elastomeric barriers are options for improving both water resistance and thermal performance.

Successful installation on existing structures hinges on careful preparation, quality materials, and correct system selection for your building type. Long-term performance is maximized when systems are installed by specialists experienced with the unique challenges of New England properties, including managing moisture migration, accommodating seasonal movement, and addressing historic or specialty construction details.

Ongoing maintenance and regular inspections help ensure that waterproofing systems continue to perform effectively. In environments with frequent freeze-thaw cycling and significant moisture exposure, periodic evaluations are especially important for catching early signs of wear, allowing for timely repairs, and protecting your asset’s value over the long term.