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
Giants 400 | Dec 3, 2020
2020 Convention Center Sector Giants: Top architecture, engineering, and construction firms in the U.S. convention center sector
AECOM, Gensler, and Jacobs head BD+C's rankings of the nation's largest convention center sector architecture, engineering, and construction firms, as reported in the 2020 Giants 400 Report.
Giants 400 | Dec 3, 2020
2020 Reconstruction Sector Giants: Top architecture, engineering, and construction firms in the U.S. building reconstruction and renovation sector
Gensler, Jacobs, and STO Building Group head BD+C's rankings of the nation's largest reconstruction sector architecture, engineering, and construction firms, as reported in the 2020 Giants 400 Report.
Giants 400 | Dec 3, 2020
2020 K-12 School Sector Giants: Top architecture, engineering, and construction firms in the U.S. K-12 school facilities sector
AECOM, Gilbane, and PBK head BD+C's rankings of the nation's largest K-12 school facilities sector architecture, engineering, and construction firms, as reported in the 2020 Giants 400 Report.
Giants 400 | Dec 3, 2020
2020 Sports Facilities Sector Giants: Top architecture, engineering, and construction firms in the U.S. sports facilities sector
Kimley-Horn, Mortenson, and Populous top BD+C's rankings of the nation's largest sports facilities sector architecture, engineering, and construction firms, as reported in the 2020 Giants 400 Report.
Giants 400 | Dec 3, 2020
2020 Office Sector Giants: Top architecture, engineering, and construction firms in the U.S. office building sector
Gensler, Jacobs, and STO Building Group head BD+C's rankings of the nation's largest office building sector architecture, engineering, and construction firms, as reported in the 2020 Giants 400 Report.
Giants 400 | Dec 3, 2020
2020 Hotel Sector Giants: Top architecture, engineering, and construction firms in the U.S. hospitality sector
Gensler, Jacobs, and Suffolk Construction top BD+C's rankings of the nation's largest hotel sector architecture, engineering, and construction firms, as reported in the 2020 Giants 400 Report.
Giants 400 | Dec 3, 2020
2020 Healthcare Sector Giants: Top architecture, engineering, and construction firms in the U.S. healthcare facilities sector
HDR, Jacobs, and Turner top BD+C's rankings of the nation's largest healthcare facilities sector architecture, engineering, and construction firms, as reported in the 2020 Giants 400 Report.
Giants 400 | Dec 3, 2020
2020 Government Sector Giants: Top architecture, engineering, and construction firms in the U.S. government buildings sector
HNTB, Jacobs, and Turner top BD+C's rankings of the nation's largest government sector architecture, engineering, and construction firms, as reported in the 2020 Giants 400 Report.
Giants 400 | Dec 3, 2020
2020 Cultural Facilities Giants: Top architecture, engineering, and construction firms in the U.S. cultural facilities sector
AECOM, Arup, and Populous head BD+C's rankings of the nation's largest cultural facilities sector architecture, engineering, and construction firms, as reported in the 2020 Giants 400 Report.
Giants 400 | Dec 2, 2020
2020 Retail Giants: Top architecture, engineering, and construction firms in the U.S. retail building sector
Gensler, Jacobs, and PCL Construction top BD+C's rankings of the nation's largest retail sector architecture, engineering, and construction firms, as reported in the 2020 Giants 400 Report.