What parts of a commercial building require waterproofing?

Commercial buildings face significant moisture challenges in New England due to variable weather, seasonal freeze-thaw cycles, and frequent precipitation. Effective waterproofing safeguards critical building areas and helps prevent costly structural and interior damage.

Primary areas of concern include:

• Roofs: Flat and low-slope roofs are common on commercial properties and must be protected against ponding, wind-driven rain, snow, and ice dams. Waterproofing systems, membranes, and proper drainage are essential to avoid leaks and deterioration.
• Foundations and Below-Grade Spaces: Basement walls, foundations, and underground garages can be vulnerable to groundwater intrusion, especially with New England’s high water tables and frost movement. Waterproofing solutions such as fluid-applied membranes, drainage systems, and sealants help prevent seepage and structural compromise.
• Exterior Walls and Facades: Masonry, brick, concrete, and exterior insulation finish systems (EIFS) can absorb and transmit water. Proper joint sealants, coatings, and periodic inspection of expansion joints and penetrations are crucial for maintaining a watertight envelope.
• Plaza Decks, Terraces, and Balconies: These exposed horizontal surfaces require specialized waterproofing assemblies to withstand standing water, freeze-thaw cycles, and deicing salts. Deficient waterproofing in these areas can lead to leaks into spaces below and acceleration of reinforcing steel corrosion.
• Parking Garages: Above and below-grade garages are exposed to water and chlorides from snow, ice, and road salts. Waterproofing coatings, joint sealants, and targeted repairs are vital to protect concrete and embedded steel reinforcement.

Other important areas may include mechanical rooms, elevator pits, and any penetrations or transitions between building materials. Each building presents unique risk factors based on construction type, usage, and site conditions. Regular inspection and maintenance planning help identify vulnerabilities before damage occurs.

Proper planning, professional installation, and ongoing maintenance are fundamental to ensuring waterproofing performance and long-term asset protection for commercial and institutional properties in Massachusetts and greater New England.