Featured Research

from universities, journals, and other organizations

Carbon monoxide penetrates gypsum wallboard

Date:
August 21, 2013
Source:
Virginia Mason Medical Center
Summary:
Carbon monoxide (CO) from external sources can easily penetrate gypsum wallboard (drywall) commonly used in apartments and houses, potentially exposing people indoors to the toxic, odorless, tasteless gas within minutes, concludes a new study. CO also penetrates painted drywall, albeit more slowly, the researchers determined.

Carbon monoxide (CO) from external sources can easily penetrate gypsum wallboard (drywall) commonly used in apartments and houses, potentially exposing people indoors to the toxic, odorless, tasteless gas within minutes, concludes a study conducted at Virginia Mason Medical Center.

Related Articles


These findings, which underscore the importance of CO alarms in single-family and multi-family homes, are published in today's edition of the Journal of the American Medical Association. Authors of the study are Neil B. Hampson, MD; James R. Holm, MD; and engineer Todd G. Courtney, of the Virginia Mason Center for Hyperbaric Medicine.

Their research casts doubt on the assumption that the risk for CO poisoning inside a residence is eliminated if there is no apparent internal source of the gas. They determined that carbon monoxide from an external source, such as an electrical generator operating in an adjacent apartment or an automobile engine running in an attached garage, can pass through drywall ceilings and walls because gypsum wallboard is highly porous. CO also penetrates painted drywall, albeit more slowly, the researchers determined.

Their study is believed to be the first to examine the ability of carbon monoxide to diffuse through gypsum wallboard. Gypsum particles contain microscopic pores that are many times larger than CO molecules, allowing these dangerous molecules to easily penetrate drywall.

"There are numerous media reports describing simultaneous CO poisonings in different units of multifamily dwellings," the authors note. Even though carbon monoxide might have traveled through ventilation ducts, hallways, elevator shafts or stairways in some cases, this was not possible in every case due to configurations of the buildings, they add. This raised the question whether CO could pass through drywall.

Many states are enacting legislation mandating residential CO alarms, although some have exempted structures if there is no apparent indoor carbon monoxide source (i.e., fuel-burning appliances, fireplaces, etc.). This action is dangerous, authors of the study caution, because occupants of multifamily dwellings, for example, can bring sources of CO production into their units and put themselves and people in neighboring units in harm's way.

Carbon monoxide poisoning causes about 500 accidental deaths annually in the U.S.


Story Source:

The above story is based on materials provided by Virginia Mason Medical Center. Note: Materials may be edited for content and length.


Journal Reference:

  1. Neil B. Hampson et al. Diffusion of Carbon Monoxide Through Gypsum WallboardDiffusion of Carbon Monoxide Through WallboardLetters. JAMA, 2013; 310 (7): 745 DOI: 10.1001/jama.2013.43127

Cite This Page:

Virginia Mason Medical Center. "Carbon monoxide penetrates gypsum wallboard." ScienceDaily. ScienceDaily, 21 August 2013. <www.sciencedaily.com/releases/2013/08/130821124254.htm>.
Virginia Mason Medical Center. (2013, August 21). Carbon monoxide penetrates gypsum wallboard. ScienceDaily. Retrieved November 24, 2014 from www.sciencedaily.com/releases/2013/08/130821124254.htm
Virginia Mason Medical Center. "Carbon monoxide penetrates gypsum wallboard." ScienceDaily. www.sciencedaily.com/releases/2013/08/130821124254.htm (accessed November 24, 2014).

Share This


More From ScienceDaily



More Earth & Climate News

Monday, November 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ebola-Hit Sierra Leone's Late Cocoa Leaves Bitter Taste

Ebola-Hit Sierra Leone's Late Cocoa Leaves Bitter Taste

AFP (Nov. 23, 2014) The arable district of Kenema in Sierra Leone -- at the centre of the Ebola outbreak in May -- has been under quarantine for three months as the cocoa harvest comes in. Duration: 01:32 Video provided by AFP
Powered by NewsLook.com
NY Gov. on Flood Prep: 'prepared for the Worst'

NY Gov. on Flood Prep: 'prepared for the Worst'

AP (Nov. 23, 2014) First came the big storm. Now comes the big melt for residents of flood-prone areas around Buffalo. New York's governor says officials are preparing for the worst as the temperature is expected to rise and potentially melt several feet of snow. (Nov. 23) Video provided by AP
Powered by NewsLook.com
Anglerfish Rarely Seen In Its Habitat Will Haunt You

Anglerfish Rarely Seen In Its Habitat Will Haunt You

Newsy (Nov. 22, 2014) For the first time Monterey Bay Aquarium recorded a video of the elusive, creepy and rarely seen anglerfish. Video provided by Newsy
Powered by NewsLook.com
Raw: Buffalo Residents Digging Out, Helping out

Raw: Buffalo Residents Digging Out, Helping out

AP (Nov. 22, 2014) Hundreds of volunteers joined a 'shovel brigade' in Buffalo, New York on Saturday, as the city was living up to its nickname, "The City of Good Neighbors." Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins