Needham Public Library required increased energy efficiency
The decision was made to strip the building back to the original structure and then to create a new facility with double the space and in keeping with the Georgian Revival architecture. While the look would complement the existing structure, the Massachusetts Energy Code Chapter 13 would require inclusion of an air barrier to control the movement of air and moisture into and out of the building for the protection of the new structure and its occupants and increased energy efficiency.
Ann Beha Architects determined that a fluid-applied air barrier system would provide better protection than traditional moisture barriers and avoid the installation problems associated with other types of systems. ExoAir Air Barrier System was selected.
ExoAir 120 is a monolithic (seamless) elastomeric system designed to be sprayed on exterior above-grade walls for a fully adhered layer of protection. Used with ExoAir 110 Self-Adhered Air & Vapor Barrier Membrane, continuous protection was ensured and the air barrier could be fully tied into the roof despite numerous roof elevations and intricate wooden soffits at the top of the building.
Compatibility is essential for long-term protection, so ExoAir TWF Self-Adhered Thru-Wall Flashing Membrane and sealants completed the system. By having a comprehensive air barrier system, Gleeson Powers was able to provide assurance of continuity at every transition, tie-in and overlap. As a final quality control measure, routine testing was done to ensure consistent coverage with a wet-mil thickness gauge. Though reminiscent of the past, Needham Public Library is now energy-efficient, occupant-friendly and ready for the next century.