How do you restore aging facades without damaging original materials?

Restoring aging commercial and institutional facades—especially historic masonry—requires a precise balance of preservation, protection, and building science. At ESI, restoration begins with a thorough inspection and assessment to understand the original construction techniques, materials, and current condition of the structure. This evaluation often includes examining masonry units (such as brick or stone), mortar composition, and potential water intrusion or freeze-thaw related deterioration, all common in New England’s climate.

To avoid damaging original materials, our approach emphasizes minimally invasive techniques. For example, we select cleaning methods that are gentle and non-abrasive, using low-pressure water or proprietary restoration cleaners suitable for historic substrates. Abrasive cleaning methods that can erode brick faces or alter the masonry’s appearance are avoided.

When repointing masonry, we match the new mortar’s strength, color, and composition to the original mortar. This is crucial—using a mortar that is too hard or chemically incompatible can harm the masonry by trapping moisture or accelerating freeze-thaw damage. Our team relies on time-tested restoration materials and follows industry best practices for historic structures, ensuring the repairs are structurally sound and visually consistent.

Damaged units are replaced individually and only when repair is not feasible, sourcing brick or stone that closely matches the original. If a facade includes decorative or historically significant features, we take extra care to preserve or restore them, often documenting original profiles and finishes before any work begins.

Protective coatings or water repellents, if required, are chosen based on their vapor permeability, allowing the building to manage moisture while improving durability. Many commercial and historic facades also benefit from improved sealant and joint solutions, which reduce water infiltration while maintaining flexibility and compatibility with surrounding materials.

Finally, the key to long-term success is preventative maintenance. Regular inspections, timely repairs, and appropriate drainage or waterproofing upgrades can extend the life of the restored facade and avoid costly emergency interventions in the future.

Every building is unique, so customized planning and an understanding of local weather stresses—like New England’s freeze-thaw cycles and moisture exposure—are integral to proper facade restoration without loss of historic value.