How can masonry be protected from future water damage?

Protecting masonry against future water damage is critical for the long-term durability and structural integrity of commercial, institutional, and historic buildings throughout New England. Water infiltration can lead to deterioration such as spalling, efflorescence, cracking, and even structural compromise, particularly with the region’s harsh freeze-thaw cycles and regular seasonal moisture.

A comprehensive approach to masonry protection includes several key strategies:

1. Water-Repellent Treatments: The application of vapor-permeable, silane- or siloxane-based water repellents can provide effective protection without trapping moisture inside the wall system. These products allow masonry to “breathe,” minimizing the risk of internal damage while reducing water absorption that leads to freeze-thaw deterioration. It is important that these treatments are selected and installed by professionals familiar with the needs of commercial and historic structures.

1. Ongoing Maintenance of Sealants and Expansion Joints: Joints around windows, doors, copings, and other penetrations are frequent points of entry for water. Regular inspection and replacement of failed sealants and maintenance of expansion joints are vital to prevent water migration into the building envelope. Commercial buildings should include joint inspections as part of their preventative maintenance protocol.

1. Mortar and Masonry Repairs: Damaged or deteriorated mortar joints expose the interior of masonry walls to further water infiltration. Repointing, which involves removing and replacing deteriorated mortar, restores the facade’s integrity and appearance. For historic or architecturally significant buildings, matching original mortar composition and color is also important to preserve the structure’s value.

1. Proper Drainage and Site Management: Ensuring that rooflines, flashing systems, gutters, downspouts, grade slopes, and sump pumps direct water away from masonry facades reduces prolonged moisture exposure. Commercial sites with complex roofs or large paved areas can benefit from scheduled reviews and adjustments to drainage systems.

1. Facade and Envelope Evaluation: Professional inspection and evaluation help identify early signs of water intrusion, cracking, or material failure. Establishing a routine inspection cycle supports early intervention, extending the service life of masonry elements while preventing more extensive and costly damage.

1. Addressing Regional Risks: In New England, exposure to snow, ice, deicing salts, and rapidly changing temperatures increases masonry vulnerability. Protective measures should be tailored with these regional risks in mind, including the use of salt-resistant materials where required.

A proactive approach to masonry protection combines careful planning, periodic maintenance, high-quality materials, and knowledge of regional weather impacts. Commercial property owners and facility managers should partner with experienced professionals, like ESI who understand the balance between preserving appearance, ensuring performance, and protecting long-term value.