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 | Jul 9, 2015
Opioid abuse blamed for increase in worker injuries, business losses
Insurance giant CNA says concerns are increasing in the construction industry.
Architects | Jul 7, 2015
Why AEC firms should be cultivating 'visible experts'
A new study pinpoints the true dollar value of having knowledge leaders and market shapers on your team.
Green | Jul 7, 2015
Philips sheds new light on growing fresh food indoors
A research center in The Netherlands is testing the latest techniques in urban farming.
Healthcare Facilities | Jul 6, 2015
The main noisemakers in healthcare facilities: behavior and technology
Over the past few decades, numerous research studies have concluded that noise in hospitals can have a deleterious effect on patient care and recovery.
Contractors | Jul 1, 2015
ABC: Nonresidential construction spending continues growth with stellar May
Through the first five months of 2015, nonresidential construction spending is having its second best year since the Census Bureau began tracking the metric in 2002, according to ABC.
Contractors | Jun 30, 2015
Arcadis report: Errors and omissions in contract documents leading cause of disputes in North America
While the value of disputes fell by nearly 14% in 2014, the time it took to resolve them lengthened substantially last year, according to a new report from Arcadis.
Contractors | Jun 28, 2015
Construction spending, despite some slowing, stays on healthy growth path
FMI’s latest forecasts find continued strengths in manufacturing, lodging, and office sectors.
Architects | Jun 23, 2015
Architecture Billings Index back to positive territory for May 2015
The American Institute of Architects reported the May ABI score was 51.9, up from a mark of 48.8 in April.
High-rise Construction | Jun 23, 2015
The world's best new skyscrapers for 2015
One World Trade Center and Abu Dhabi's Burj Mohammed Bin Rashid Tower are among the four towers named Best Tall Buildings by the Council on Tall Buildings and Urban Habitat.
BIM and Information Technology | Jun 21, 2015
11 tips for mastering 3D printing in the AEC world
Early adopters provide first-hand advice on the trials and tribulations of marrying 3D printing with the science of building technology.