Gypsum wallboard does not keep out carbon monoxide, study shows

August 20, 2013

Researchers found that carbon monoxide diffused across single-layer gypsum wallboard of two thicknesses, double-layer wallboard, and painted double-layer wallboard.

"Carbon monoxide (CO) is a significant U.S. health problem, responsible for approximately 500 accidental deaths annually, and a risk of 18 percent to 35 percent for cognitive 1 year after poisoning. Most morbidity and mortality from CO poisoning is believed to be preventable through public education and CO alarm use. States have been enacting legislation mandating residential CO alarm installation. However, as of December 2012, 10 of the 25 states with statutes mandating CO alarms exempted homes without fuel-burning appliances or attached garages, believing that without an internal CO source, risk is eliminated. This may not be true if CO diffuses directly through wall-board material," write Neil B. Hampson, M.D., of Virginia Mason Medical Center, Seattle, and colleagues.

As reported in a JAMA Research Letter, a Plexiglas chamber divided by various configurations of gypsum wallboard was used to determine whether CO diffuses across drywall. Wallboard of various thickness levels were tested. Carbon monoxide test gas was infused into the chamber and then CO concentrations were measured once per minute in each chamber for 24 hours. The authors sought to determine how rapidly a concentration of CO toxic to humans would be reached in the noninfused chamber and whether diffusion would then continue.

The researchers found that diffused across single-layer gypsum wallboard of 2 thicknesses, double-layer wallboard, and painted double-layer wallboard. "Gypsum's permeability to CO is due to its . … The ability of CO to diffuse across gypsum wallboard may explain at least some instances of CO poisoning in contiguous residences. Exempting residences without internal CO sources from the legislation mandating CO alarms may put people in multifamily dwellings at risk for unintentional CO poisoning."

Explore further: Anti-angina drug shows protective effects from carbon monoxide

More information: JAMA. 2013;310[7]:745-746.

Related Stories

Recommended for you

Bright lighting encourages healthy food choices

May 26, 2016

Dining in dimly lit restaurants has been linked to eating slowly and ultimately eating less than in brighter restaurants, but does lighting also impact how healthfully we order?

Big Data can save lives, says leading cancer expert

May 16, 2016

The sharing of genetic information from millions of cancer patients around the world could be key to revolutionising cancer prevention and care, according to a leading cancer expert from Queen's University Belfast.

New soap to ward off malaria carrying mosquitoes

May 13, 2016

(Medical Xpress)—Gérard Niyondiko along with colleagues Frank Langevin and Lisa Barutel has posted a project on the crowd source funding site ulule for a product called Faso Soap. They claim the soap can cut in half the ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.