Presentation on the relationship between temperature and dew point differentials and the impacts they may have on the performance of adhesives. Two case studies will be evaluated along with supporting lab data to highlight the importance of understanding environmental conditions and the role they play in proper adhesive drying.
Due to environmental concerns and code restrictions with solvent-based single ply adhesives, the use of water-based (WB) and low-VOC solvent-based (LVOC) adhesives is becoming much more popular in the low-slope roofing market. At the same time, the roofing industry has become concerned with the longer drying times exhibited by WB and LVOC products because both react differently to environmental conditions than solvent-based adhesives. This is especially true during changes in ambient temperatures and dew points up on the roof.
While there is a general industry consensus that most of these issues revolve around WB adhesive drying rates, it has been found that similar problems may also apply to LVOC adhesive products. These concerns have taken the form of blistering and/or inadequate adhesion of the single ply membrane to the substrate when using WB and LVOC adhesives in certain environmental conditions