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
Contractors | Jun 26, 2019
Katerra launches apprenticeship program to help develop the future of construction
The program offers nationally recognized, portable construction trade credentials.
Building Tech | Jun 26, 2019
Modular construction can deliver projects 50% faster
Modular construction can deliver projects 20% to 50% faster than traditional methods and drastically reshape how buildings are delivered, according to a new report from McKinsey & Co.
Contractors | Jun 15, 2019
Turner tops off new classroom space at Middle Tennessee State University
The building includes a “command center” for training students to interact with emergency personnel.
Contractors | May 24, 2019
Two versions of a hard hat for the future are ready for production
Clayco worked with a Georgia college to design a hard hat with greater comfort and adaptability.
Contractors | May 20, 2019
SoCal’s oldest GC bounds into second century
C.W. Driver succeeds by sticking to core markets and practices.
Codes and Standards | Apr 25, 2019
Report: Contractors invest $1.6 billion in workforce development annually
ABC members increased training spending 45% from 2013, according to a new report.
Resiliency | Apr 22, 2019
Turner Construction doubles down on jobsite efficiency
The company targets a 50% cut in greenhouse gas emissions and water use from construction activities by 2030.
Building Tech | Apr 19, 2019
Skender, Z Modular reach agreement to fabricate multifamily housing components
Factory to open soon on the southwest side of Chicago.
Contractors | Apr 15, 2019
Do you have a fear of getting 'Uber'd'? Join the club
Exacerbating the AEC talent shortage is the coming mass exodus of baby boomers as they reach retirement age.
Contractors | Apr 15, 2019
Suffolk launches Smart Lab in Los Angeles
The lab will identify, test, and scale new technologies to help advance the construction industry.
