Featured Research

from universities, journals, and other organizations

New moisture-buffering plaster 'sucks up' water vapor

Date:
February 3, 2014
Source:
Empa
Summary:
Water vapor generated by cooking, taking a shower or drying damp clothes can condense on cold walls, encouraging the growth of mildew and microbes. Scientists have now developed a special wall plaster to deal with this problem. Its ability to absorb moisture from the air is significantly better than that of conventional lime plaster and even that of clay rendering.

Empa researcher Thomas Stahl developed the moisture buffering plaster together with Sto AG.
Credit: Image courtesy of Empa

Water vapour generated by cooking, taking a shower or drying damp clothes can condense on cold walls, encouraging the growth of mildew and microbes. The company Sto AG, in collaboration with Empa, has developed a special wall plaster to deal with this problem. Its ability to absorb moisture from the air is significantly better than that of conventional lime plaster and even that of clay rendering.

The new wall plaster that Empa building physicist Thomas Stahl was looking for needed to be humidity regulating, mineral-based, easy to use and not much more expensive than alternative products. The newly developed moisture-buffering plaster can in fact absorb 90 g of water vapour per square meter, measured by the standardized "Nordtest" method. This exceeds the capacity of the best clay rendering, measured for comparison purposes, by about 30 per cent.

The health and economic advantages offered by a relatively stable air humidity are enormous. Occupants and furnishings are less stressed, and energy consumption (and therefore heating costs) drops because dry air can be brought to a comfortable room temperature more quickly.

In order to achieve the required level of humidity storage capacity, the moisture-buffering plaster has to be applied with a thickness of 1 to 2 cm. This significantly reduces the risk of water vapour condensing on cold areas of the wall and on thermal bridges. The moisture absorbing plaster draws in the excess humidity from the room air and stores it, releasing it back to the environment hours later. The room -- for example a windowless bathroom -- only need be aired and then warmed up again.

Sto AG has created an entire range of indoor rendering products based on the Empa innovation, which it called "StoCalce Functio." The range includes a regulating base layer, a functional filling layer and two finishing coatings. These mineral-based products unite the positive characteristics of lime and clay renderings -- in combination they absorb more than twice as much moisture as conventional lime-based plasters and about 50 per cent more than clay renderings. In addition, the environmentally friendly material is water resistant and hard wearing, as well as being easy to handle and use.


Story Source:

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


Cite This Page:

Empa. "New moisture-buffering plaster 'sucks up' water vapor." ScienceDaily. ScienceDaily, 3 February 2014. <www.sciencedaily.com/releases/2014/02/140203112128.htm>.
Empa. (2014, February 3). New moisture-buffering plaster 'sucks up' water vapor. ScienceDaily. Retrieved April 15, 2014 from www.sciencedaily.com/releases/2014/02/140203112128.htm
Empa. "New moisture-buffering plaster 'sucks up' water vapor." ScienceDaily. www.sciencedaily.com/releases/2014/02/140203112128.htm (accessed April 15, 2014).

Share This



More Matter & Energy News

Tuesday, April 15, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Google Patents Contact Lens Cameras; Internet Is Wary

Google Patents Contact Lens Cameras; Internet Is Wary

Newsy (Apr. 15, 2014) Google has filed for a patent to develop contact lenses capable of taking photos. The company describes possible benefits to blind people. Video provided by Newsy
Powered by NewsLook.com
The Walking, Talking Oil-Drigging Rig

The Walking, Talking Oil-Drigging Rig

Reuters - Business Video Online (Apr. 15, 2014) Pennsylvania-based Schramm is incorporating modern technology in its next generation oil-drigging rigs, making them smaller, safer and smarter. Ernest Scheyder reports. Video provided by Reuters
Powered by NewsLook.com
Dutch Highway Introduces Glow-In-The-Dark Paint

Dutch Highway Introduces Glow-In-The-Dark Paint

Newsy (Apr. 14, 2014) A Dutch highway has become the first lit by glow-in-the-dark paint — a project aimed at reducing street light use. Video provided by Newsy
Powered by NewsLook.com
Google Buys Drone Maker, Hopes to Connect Rural World

Google Buys Drone Maker, Hopes to Connect Rural World

Newsy (Apr. 14, 2014) Formerly courted by Facebook, Titan Aerospace will become a part of Google's quest to blanket the world in Internet connectivity. Video provided by Newsy
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:
from the past week

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