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Whether rebuilding after a flood or modernizing old masonry walls, a clear plan for managing moisture is required to ensure the longevity of the renovated walls.
Historic masonry structures that were drafty and poorly insulated relied on the back side of the masonry wall drying to the interior. Any waterproofing, air sealing or insulating products that are applied directly to the interior side of the masonry will impact its ability to dry and accelerate deterioration of the masonry units and mortar joints. Fluid applied sealers and spray foam also permanently alter the interior of masonry walls.
Under proper conditions, a rainscreen drainage mat like Sure Cavity can be used in restorations to maintain a drainage gap between mass masonry walls and an air sealed & insulated retrofit.
Modern masonry walls are designed as non-load bearing veneers that require anchoring to the structural backup wall to keep the veneer in-plane. During renovations, many masonry walls are found to be lacking brick ties. MTI's Retrofit Brick Ties are designed to be installed from the interior side of masonry walls and fastened to wood or metal framing.
In a perfect world flooded buildings would be rebuilt outside of the flood plain or elevated above potential flood levels. The reality for many buildings is that those options are cost-prohibitive. The next best option is rebuilding walls with flood tolerant materials that can drain and dry in a future flood. Build flood resilient walls with Sure Cavity™ and Retrofit Brick Ties™.