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 | Jan 3, 2022
New York City bans new gas hookups
Applies to gas stoves, boilers, and heaters in new buildings and buildings that undergo gut renovations.
Codes and Standards | Jan 3, 2022
New engineering guide on fire safety for very tall buildings released
Topics include emergency egress, fire resistance, building envelope, suppression, detection, alarms, and smoke control.
Codes and Standards | Dec 22, 2021
Updated ASCE 7-22 standard includes first-ever criteria for tornado-resistant design
New document provides up-to-date, coordinated loading provisions for general structural design.
Codes and Standards | Dec 21, 2021
Outdated and redundant building codes plague St. Louis area development
Region’s combined codes nearly double the length of the IRS Code.
Digital Twin | Dec 20, 2021
Groups ally to advance augmented reality and digital twin technology
AREA and Digital Twin Consortium to work on improving how technology components interoperate.
Codes and Standards | Dec 20, 2021
Tension rises in California over state’s push to build more housing
Attorney general hints at lawsuits against cities that don’t comply with zoning reform.
Codes and Standards | Dec 17, 2021
Tension rises in California over state’s push to build more housing
Attorney general hints at lawsuits against cities that don’t comply with zoning reform.
Codes and Standards | Dec 16, 2021
Home builders defeat proposed Oklahoma energy conservation code upgrade
Builders cite high home prices for opposition.
Codes and Standards | Dec 16, 2021
Laws and regulations complicate growth of community solar gardens
New projects stymied by utility resistance and legislative restrictions.
Codes and Standards | Dec 16, 2021
Property owners need systematic approach to GHG emissions reduction
Energy hog buildings at risk for becoming stranded assets.
