A new technical brief from SPRI, the trade association representing the manufacturers of single-ply roofing systems and related component materials, addresses construction-generated moisture and its impact on commercial roofing systems.
Construction-generated moisture comes from activities including pouring concrete, burning propane heaters, painting, plastering, and drywall finishing. These activities can contribute to excessive levels of relative humidity inside the structure when proper remediation measures are not taken. Accumulation of condensation within the roofing assembly and within the structure can result when the temperature is at or below the dew point.
To control moisture, designers must identify the sources of moisture and develop a remediation plan during the design process. To reduce the probability of condensation, buildings under construction must be adequately ventilated, particularly during concrete hydration and other high moisture-related construction activities.
SPRI recommendations include avoiding the use of wet materials or materials with excessive moisture, installing vapor retarders in the roof assembly, avoiding penetrating vapor barriers, installing at least two layers of insulation, and always sealing deck-to-wall joints and gaps around roof penetrations.
Related Stories
| Oct 15, 2014
Drones may soon assist code inspectors for construction in the UAE
The United Arab Emirates’ Ministry of Labour announced that they will start using drones to help inspectors record when construction sites are breaking laws.
| Oct 15, 2014
Harvard launches ‘design-centric’ center for green buildings and cities
The impetus behind Harvard's Center for Green Buildings and Cities is what the design school’s dean, Mohsen Mostafavi, describes as a “rapidly urbanizing global economy,” in which cities are building new structures “on a massive scale.”
| Oct 15, 2014
Final touches make 432 Park Avenue tower second tallest in New York City
Concrete has been poured for the final floors of the residential high-rise at 432 Park Avenue in New York City, making it the city’s second-tallest building and the tallest residential tower in the Western Hemisphere.
| Oct 14, 2014
Slash energy consumption in data centers with liquid-based ‘immersive-cooling’ technology
A new technology promises to push the limits of data center energy efficiency by using liquid instead of air to cool the servers.
Sponsored | | Oct 14, 2014
3 color trends drive new commercial exterior color collections
Collectively as a society, we help create color trends, which shape our businesses, recreational facilities, healthcare centers, and civic buildings. These iconic colors are now appearing in Valspar's new color collections. SPONSORED CONTENT
| Oct 14, 2014
Get inspired with the top 10 TED talks about cities
The TED talks, none of which are longer than 20 minutes, feature speakers such as architect Moshe Safdie, Rio de Janeiro Major Eduardo Paes, and animal behaviorist Amanda Burden.
| Oct 14, 2014
Richard Meier unveils design for his first tower in Taiwan
Taiwan will soon have its first Richard Meier building, a 535-foot apartment tower in Taichung City, the country’s third-largest city.
| Oct 13, 2014
The mindful workplace: How employees can manage stress at the office
I have spent the last several months writing about healthy workplaces. My research lately has focused on stress—how we get stressed and ways to manage it through meditation and other mindful practices, writes HOK's Leigh Stringer.
| Oct 13, 2014
Debunking the 5 myths of health data and sustainable design
The path to more extensive use of health data in green building is blocked by certain myths that have to be debunked before such data can be successfully incorporated into the project delivery process.
| Oct 13, 2014
Department of Agriculture launches Tall Wood Building Competition
The competition invites U.S. developers, institutions, organizations, and design teams willing to undertake an alternative solution approach to designing and building taller wood structures to submit entries for a prize of $2 million.
