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 | Mar 23, 2022
High office vacancies have cities rethinking downtown zoning
As record-high office vacancies persist in U.S. urban areas, cities are rethinking zoning policy.
Codes and Standards | Mar 22, 2022
Dept. of Energy awards $32 million for next-generation building retrofits
The U.S. Dept. of Energy has awarded a total of $32 million for more than 30 next-generation building retrofit projects that will dramatically improve affordable housing technologies, according to a DOE news release.
Legislation | Mar 18, 2022
New framework to help site community solar projects released
The Solar Energy Industries Association (SEIA) released a new report to aid policymakers in siting community solar projects.
Codes and Standards | Mar 17, 2022
Dept. of Energy seeks input on building-integrated photovoltaic systems
The U.S. Department of Energy (DOE) Solar Energy Technologies Office (SETO) and Building Technologies Office (BTO) recently issued a request for information to gather input on technical and commercial challenges and opportunities for building-integrated photovoltaic (BIPV) systems.
Legislation | Mar 16, 2022
Weak federal commercial real estate rules will hamper seizing Russian assets
Lax disclosure regulations that have made the U.S. a global hot spot for money laundering via real estate holdings will make it difficult for officials to seize properties from Russian oligarchs.
Codes and Standards | Mar 15, 2022
First company awarded Fitwel Certification in Senior Housing for Occupant Health & Wellness
The Springs at Greer Gardens in Eugene, Ore., is the first property to earn a Fitwel global health certification under the newly created senior housing scorecard.
Codes and Standards | Mar 10, 2022
HOK offers guidance for reducing operational and embodied carbon in labs
Global design firm HOK has released research providing lab owners and developers guidance for reducing operational and embodied carbon to meet net zero goals.
Codes and Standards | Mar 7, 2022
Late payments in the construction industry rose in 2021
Last year was a tough one for contractors when it comes to getting paid on time.
Codes and Standards | Mar 7, 2022
Massachusetts proposed energy code changes don’t ban gas
Proposed changes to the Massachusetts energy code would provide incentives for builders to fully electrify buildings, but not impose a ban on natural gas hookups.
Codes and Standards | Mar 4, 2022
Construction industry faces a 650,000 worker shortfall in 2022
The U.S. construction industry must hire an additional 650,000 workers in 2022 to meet the expected demand for labor, according to a model developed by Associated Builders and Contractors.
