Industry consensus needed for multifamily energy efficiency retrofit approach

Energy efficiency upgrades in multifamily properties offer benefits to residents including lower utility bills, but some of the materials used in these projects to better insulate buildings can create health hazards.

A new report by Energy Efficiency for All (EEFA)—Making Affordable Multifamily Housing More Energy Efficient: A Guide to Healthier Upgrade Materials—offers a comprehensive guide for builders and policymakers in the use of readily available, healthier insulation and sealing materials. It includes policy frameworks to accelerate these materials’ adoption and improve air quality.

Currently, contractors and building owners are most focused on boosting efficiency performance levels of insulation and air sealing specifications with less consideration for the potential air quality impact of materials such as spray foam and modified polymer and polyurethane sealants. These materials commonly contain isocyanates, flame retardants, and phthalates that have been linked to health problems.

There are opportunities to promote healthier retrofit materials through green standards, but a broad industry discussion is needed to build consensus around a common approach, according to an article at the Natural Resources Defense Council. The Low-Income Housing Tax Credit, the most common financing source for building, renovating, and retrofitting affordable multifamily housing, for example, is a key driver in materials decisions. It could be used to promote the use of healthier insulating materials.

New York City has two very large buildings dedicated to answering the 911 calls of its five boroughs. With more than 11 million emergency calls annually, it makes perfect sense. The second of these buildings, the Public Safety Answering Center II (PSAC II) is located on a nine-acre parcel of land in the Bronx. It’s an imposing 450,000 square-foot structure—a 240-foot-wide by 240-foot-tall cube. The gleaming aluminum cube risesthe equivalent of 24 stories from behind a grassy berm, projecting the unlikely impression that it might actually be floating. Like most visually striking structures, the building has drawn as much scorn as it has admiration.