Product transparency and informed choices by purchasers drive demand for healthier products and manufacturing processes. HBN's rigorous independent research reports are available to download below.

Making Affordable Multifamily Housing More Energy Efficient: A Guide to Healthier Upgrade Materials

Insulation and air sealing are two of the most common interventions performed in energy efficiency upgrades, and yet they can introduce many chemicals of concern into buildings. That’s why Healthy Building Network (HBN) teamed up with Energy Efficiency for All (EEFA) and other partner organizations to consider healthier insulation and air sealing materials and how to help encourage their use in multifamily energy efficiency upgrades. This report includes details of HBN’s research on the common chemical content of a range of insulation and sealant materials as well as simple, actionable recommendations to make the best material choices possible. Because hazardous content is not the only consideration when making material choices, also included is HBN’s compilation of relative cost information, performance characteristics, and installation and code considerations. Finally, the report introduces a discussion of policies that may impact material decisions and how to encourage the use of healthier materials in multifamily energy efficiency upgrades.

Chlorine & Building Materials Project

Chlorine is the origin of many of the world’s most problematic chemicals and products, including polyvinyl chloride (PVC), used in building and construction. There is extensive interest in the building industry in the manufacture and use of chlorine. A necessary first step in reducing the environmental health impacts of chlorine in the supply chain of PVC and other chlorine-based products is to create a public global inventory of chlorine, vinyl chloride monomer, and PVC producers.

Eliminating Toxics in Carpet: Lessons for the Future of Recycling

Healthy Building Network's report on post-consumer carpet feedstocks calls for eliminating over 40 highly toxic chemicals in carpets that threaten public health and impede recycling. These toxics are known to cause respiratory disease, heart attacks, cancer, and asthma, and impair children's developmental health. The report outlines strategies to protect public health and the environment by improving product transparency, eliminating dangerous chemicals from carpets, and increasing carpet recycling rates. It also reveals surprising efforts in the industry to remove many of these toxic substances from carpet design.

Reclaimed Asphalt Pavement (RAP) in Building & Construction

Asphalt (also known as asphalt concrete, bitumen, or road tar) is the most common paving material by far, accounting for a 92 percent share of the 2.5 million miles of roads and highways in the United States. Reclaiming and reusing asphalt has many benefits, including waste prevention, reduction of greenhouse gas emissions, and lower lifecycle impacts compared to virgin asphalt material use.  Keys to increasing the recycling of asphalt and its attendant environmental benefits include simplifying the designs of asphalt mixes, reducing toxic additives in production, tracking materials from production through use and recycling, testing incoming materials for contaminants, and avoiding the addition of cutback solvents and other toxic rejuvenating agents. 

TSCA Workplan Chemicals Reports

On March 15, 2017, the Healthy Building Network, the Environmental Health Strategy Center, and Safer Chemicals, Healthy Families, submitted detailed comments to EPA on five chemicals to  be evaluated under the recently strengthened federal chemical safety law, the Toxic Substances Control Act (TSCA). The groups provided new information on these chemicals’ production, import, use, and disposal. Some of this information, which is based on a review of shipping records on the international trade in toxic chemicals, has never before been made available to the public. EHSC and SCHF also submitted comments on a sixth chemical, methylene chloride.


Healthy Environments: Understanding Antimicrobial Ingredients In Building Materials

Building products incorporating antimicrobial additives are becoming increasingly prevalent. Paints, and other touchable surfaces such as countertops, and virtually any product considered as an interior finish may contain one or a combination of antimicrobials. These agents are considered pesticides, but their identity—and related hazards—can be difficult for the average person to discover. This lack of transparency creates a hurdle for the informed selection of products with reduced negative impacts. 

No evidence yet exists to demonstrate that products intended for use in interior spaces that incorporate antimicrobial additives actually result in healthier populations. Further, antimicrobials may have negative impacts on both people and the environment. This paper, prepared by Perkins+Will in partnership with HBN, aims to present current information about reported or potential health and environmental impacts of antimicrobial substances as commonly used within the building industry, and to assist architects, designers, building owners, tenants, and contractors in understanding those impacts.

Post-Consumer Polyethylene in Building Products

Polyethylene is the world’s most common plastic. It is used in packaging, food and beverage containers, and consumer products. Building product manufacturers sometimes use post-consumer recycled polyethylene bags and bottles in pipes and plastic lumber. This scrap usually has minimal contents of concern, but products like detergents stored in plastic packaging can remain. So-called “bio-degradation” agents in plastic bags also contaminate this feedstock and should never be used. The plastics recycling industry is developing protocols to screen out residual contaminants. Of greatest concern: Most polyethylene goes unrecycled in the United States due to problems in supply chain controls and the low price of virgin resins. This report examines ways to optimize the use of post-consumer polyethylene in building materials.

Post-Consumer Flexible Polyurethane Foam Scrap Used In Building Products

Healthy Building Network’s research into current recycling practices for flexible polyurethane foam (FPF) indicates that most post-consumer feedstocks are contaminated with highly toxic flame retardants. Discussions of recycling FPF have centered around the human health and environmental hazards posed by the flame retardant PentaBDE, which the foam industry phased out a decade ago. But the flame retardants that have replaced PentaBDE present similar concerns. Manufacturers incorporate flame retardant-laden post-consumer FPF into new products, primarily bonded carpet cushion. Recycling and installation workers and building occupants, particularly crawling children, can be exposed to these toxic chemicals. The recent emergence of pre-consumer FPF scrap that is free of flame retardants is a great step toward a safer, more valuable feedstock, but more work is needed to track and label flame retardant-free FPF to ensure that future post-consumer foam is also flame retardant-free.

Healthy Environments: What's New (and What's Not) With PVC

This paper was prepared by Perkins+Will, in partnership with Healthy Building Network (HBN), as part of a larger effort to promote health in the built environment. Indoor environments commonly have higher levels of pollutants, and architects and designers may frequently have the opportunity to help reduce or mitigate exposures.

The purpose of this report is to present information on the environmental and health hazards of PVC, with an emphasis on information found in government sources. This report is not intended to be a comprehensive analysis of all aspects of the PVC lifecycle, or a comprehensive comparative analysis of polymer lifecycles. Rather, in light of recent claims that PVC formulas have been improved by reducing certain toxic additives, this paper reviews contemporary research and data to determine if hazards are still associated with the lifecycle of PVC. This research has been surveyed from a perspective consistent with the precautionary principle, which, as applied, means that where there is some evidence of environmental or human health impact of PVC that reasonable alternatives should be used where possible. Furthermore, and more generally, this paper is intended to build greater awareness of this common building material.

To Increase The Use Of Recycled Content In Building Products: Reduce Health Hazards & Improve Feedstock Quality

The recycling industry has made significant strides toward a closed loop material system in which the materials that make up new products today will become the raw material used to manufacture products in the future. However, contamination in some sources of recycled content raw material (“feedstock”) contain potentially toxic substances that can devalue feedstocks, impede growth of recycling markets, and harm human and environmental health. Since May 2014, the Healthy Building Network, in collaboration with StopWaste and the San Francisco Department of Environment, has been evaluating 11 common post-consumer recycled-content feedstocks used in the manufacturing of building products. This paper is a distillation of that larger effort, and provides analysis on two major feedstocks found in building products: recycled PVC and glass cullet. This research partnership seeks to provide manufacturers, purchasers, government agencies, and the recycling industry with recommendations for optimizing the use of recycled content feedstocks in building products in order to increase their value, marketability and safety. This report was prepared in support of a research session at the 2015 Greenbuild conference in Washington, DC.