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News and Insights on the Masonry Repair and Maintenance of Institutional, Commercial, and Condominium Buildings in Greater Boston and Eastern Massachusetts
Volume 14 No.4
September/October 2022
In this issue, our Case Study article describes a masonry repair project at a historic church and school building in Haverhill, MA. Our Masonry 101 article compares sealers versus sealants in masonry repair applications.

We hope that the information in this publication will be of benefit to you. If you have any comments or questions, please contact us by phone at 617-445-0274 or by email at steven@abbotbuilding.com.
Sincerely,
Abbot Building Restoration Company, Inc.
Case Study
Abbot Completes Masonry Repair Project at Historic Church and School Building in Haverhill, MA
Abbot recently completed a masonry repair and restoration project at the historic Sacred Hearts Parish church and school building in Haverhill, MA, north of Boston. The church (shown at right) is located at the corner of South Main Street and Charleton Street while the school is located across the street on Chestnut Street. 

Abbot secured the project based on a competitive bidding process among qualified masonry firms in the greater Boston area.
 
Project Scope

The overall scope of the project encompassed power washing and waterproofing both buildings, cutting and pointing various deteriorated areas, and repairing cracks and sills.

Allowing Worker Access

Specifically, the initial phase involved setting up a series of lifts to allow worker access for spot cutting and pointing various areas of both buildings to match the existing appearance of the buildings.

Power Washing and Sealing All Brick Surfaces

Following this process, all of the brick surfaces on both buildings were power washed to remove atmospheric dirt in preparation for application of a clear waterproofing sealer (Protectosil Chemtrete BSM Sealer, Evonik Industries, Essen, Germany).

Cutting and Pointing Church Chimney Facade

The next phase was to erect pipe staging to allow access to the church’s chimney at the Charleton Street elevation, so that Abbot could cut and point the entire chimney façade.

School Building Foundation Repairs

Finally, on the school building, Abbot saw cut multiple cracks in the foundation and recaulked these areas with a high performance polyurethane sealant (Tremco, Beachwood, OH). In addition, Abbot removed and replaced two windowsills with new precast concrete to match the existing appearance.

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Sacred Hearts Parish was founded in 1908 to serve the spiritual needs of the Bradford-Ward Hill neighborhood residents in Haverhill, MA. Presently, many of the 3,000 families of the Parish live within the immediate neighborhood and boundaries.
Masonry 101
Sealers vs Sealants
In the Masonry 101 article above, Abbot used a clear waterproof sealer for one application and a high performance polyurethane sealant for another.
 
What is the Difference between a “Sealer” and a “Sealant”?
 
Although the terms are commonly used interchangeably, sealers form a film, while sealants leave an elastic or rubberized coatingA sealer can be applied onto a large surface to form a film or coating, while a sealant (application photo at left) is a filler that can be applied into joints, gaps, voids and cracks. Both materials are typically used to render surfaces waterproof.

Sealers

Sealers are typically applied to surfaces to reduce the penetration of undesirable materials, such as water or chlorides. Sealers may penetrate into the surface or form a very thin surface layer (typically less than 3 mils). Thicker surface treatments are usually called coatings.

Sealants

Sealants, or caulking, are used for filling voids, gaps, cracks, and joints. A variety of sealants are available for different applications and types of construction. Sealants may be rigid or flexible, and nonsagging or self-leveling, depending on performance requirements.
28 Allerton Street
Boston, MA 02119-2933
Tel: (617) 445-0274 * Fax: (617) 445-0277
Email: steven@abbotbuilding.com