What causes water intrusion in commercial buildings?

Several factors contribute to water intrusion in commercial buildings, especially within New England’s climate. Common sources include inadequate or failing waterproofing systems, deteriorated sealants, compromised flashing, damaged masonry, structural cracks, and poorly designed or clogged drainage systems.

The building envelope, which includes roofs, walls, windows, doors, and foundation areas, acts as the primary barrier against water. As these components age, exposure to freeze-thaw cycles, wind-driven rain, snow, ice, and de-icing salts can accelerate deterioration. In New England, repeated freeze-thaw cycles can cause materials to expand and contract, resulting in cracks in masonry or concrete and failures in sealant joints. These small failures often allow water to enter wall assemblies, basement areas, or parking structures.

Design and construction flaws also play a significant role. Improper detailing at parapets, coping stones, or expansion joints can leave vulnerable entry points for moisture. Roof penetrations, such as HVAC curbs or drains, require robust flashing and waterproofing. Over time, neglected maintenance can lead to clogged gutters or failed drainage, allowing water to pool and penetrate surfaces.

Historic and older commercial buildings in Massachusetts and greater New England are particularly susceptible as original materials and assemblies were often not designed for today’s higher moisture exposures and temperature swings. Upgrading older structures involves careful inspection, selection of compatible repair materials, and craftsmanship to restore watertightness while protecting historic character.

Early identification of potential water intrusion issues is essential for long-term asset protection. Regular inspection of the building envelope, timely repairs, and planning preventative maintenance help avoid costly structural or interior damage. Professional evaluation by experienced commercial waterproofing specialists such as ESI Waterproofing & Masonry Restoration, Inc. ensures correct diagnosis, targeted solutions, and durable results specific to the demands of New England’s climate.