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
| Jan 21, 2015
From technician to rainmaker: Making the leap in your career
Many AEC firms focus on training for the hard skills of the profession, not so much for business prowess, writes BD+C's David Barista.
Modular Building | Jan 21, 2015
Chinese company 3D prints six-story multifamily building
The building components were prefabricated piece by piece using a printer that is 7 meters tall, 10 meters wide, and 40 meters long.
| Jan 21, 2015
Tesla Motors starts construction on $5 billion battery plant in Nevada
Tesla Motors’ “gigafactory,” a $5 billion project on 980 acres in Sparks, Nev., could annually produce enough power for 500,000 electric cars.
| Jan 20, 2015
Daring hotel design scheme takes the shape of cut amethyst stone
The Dutch practice NL Architects designed a proposal for a chain of hotels shaped like a rock cut in half to reveal a gemstone inside.
| Jan 20, 2015
Avery Associates unveils plans for London's second-tallest tower
The 270-meter tower, dubbed the No. 1 Undershaft, will stand next to the city's "Cheesegrater" building.
| Jan 19, 2015
HAO unveils designs for a 3D movie museum in China
New York-based HAO has released designs for the proposed Bolong 3D Movie Museum & Mediatek in Tianjin.
| Jan 19, 2015
Gaudi’s first work outside Spain will be a chapel in Chile
Nearly 100 years after Antoni Gaudí’s death, Chile will begin constructing a chapel using his designs.
| Jan 19, 2015
Architecture for Humanity closes office, plans to file for bankruptcy
After more than 15 years of work, the nonprofit design group Architecture for Humanity has closed its San Francisco office and plans to file for Chapter 7 bankruptcy protection.
| Jan 17, 2015
When is a train station not a train station? When it’s a performance venue
You can catch a train at Minneapolis’s new Target Field Station. You can also share in an experience. That’s what ‘Open Transit’ is all about.
| Jan 16, 2015
Artsy lifeguard stations will brighten Toronto’s snowy beach
Five winning designs have been unveiled for lifeguard stands that will double as public space art installations on Toronto's beach.
