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
Codes and Standards | Apr 6, 2021
Lendlease achieves net-zero carbon in Boston, Chicago multifamily portfolio
New projects in New York, Los Angeles on track to reach goal.
Codes and Standards | Apr 5, 2021
Specification for sliding door, lift and slide roller assemblies updated
Addresses market trend toward heavy sliding doors.
Codes and Standards | Apr 5, 2021
Construction employment rebounds in March following February drop
Rising costs, supply-chain woes, and cancellations threaten outlook.
Codes and Standards | Apr 2, 2021
Intl. Code Council’s new development system could be a brake on building decarbonization
Local governments lose influence on creating new energy efficiency rules.
Codes and Standards | Apr 1, 2021
Cuomo proposes strengthened NY building codes to boost efficiency
Would apply to appliance, equipment efficiency and reduce water use.
Codes and Standards | Mar 25, 2021
N.C.’s Outer Banks’ communities struggle for ways to keep the sea from overrunning them
Tax hikes for beach replenishment offer temporary solution.
Codes and Standards | Mar 24, 2021
Perkins&Will’s D.C. office pledges to eliminate embodied carbon in commercial interiors
Firm aims to reach goal on all designs by 2030.
Codes and Standards | Mar 23, 2021
The 15-minute city may not work in much of North America
Segregated neighborhoods and car-centric cities may not adapt to the European model.
Codes and Standards | Mar 22, 2021
Think tank offers plan for new approach to reduce neighborhood poverty
Strategy uses more targeted approach to invest in low-income areas.
Codes and Standards | Mar 19, 2021
California city bans construction of new gas stations
Existing stations will not be allowed to add more pumps.
