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 | Jun 14, 2019
Reports from Intl. Code Council focus on expanding use of shipping containers as building materials
Three companies show compliance for using containers for housing.
Codes and Standards | Jun 13, 2019
Report explores potential for rope-less and multidirectional elevators in tall buildings
Technology can enable cities to be more interconnected, efficient, and accessible.
Codes and Standards | Jun 12, 2019
USGBC-LA launches Net Zero Accelerator
Goal is to enable building tech market adoption for a net positive future.
Codes and Standards | Jun 11, 2019
BREEAM USA In-Use standard to be released this fall
Will expand to include residential and multifamily for assessment and certification.
Codes and Standards | Jun 10, 2019
Intl. Code Council releases Natural Disaster Preparedness Guide
Provides tips for staying safe during and after a hurricane or severe weather.
Codes and Standards | Jun 7, 2019
Market conditions indicate slower growth in industrial real estate sector
E-commerce, market oversupply, rising interest rates to dampen hot market.
Codes and Standards | Jun 3, 2019
Haskell invests in BLOX, creator of modular-based delivery method
‘Represents important part of Haskell’s future strategy,’ says CEO.
Codes and Standards | Jun 3, 2019
Florida may eliminate certificate of need requirement for new hospitals
Bill could boost specialized facilities.
Codes and Standards | May 31, 2019
RELi 2.0 standard for sustainability, resilience being piloted
Will be open to LEED-registered or -certified projects, with introductory pricing and support.
Codes and Standards | May 31, 2019
Pankow Foundation releases report, tools for embodied carbon impacts
Focus is on MEP and tenant improvements.