The discussion in the geomembrane industry regarding how to overcome the effects of thermally induced wrinkling has become more active recently. Some geomembranes exhibit high levels of Thermal Expansion Contraction (CTE). As far back as 2007, recommendations were that geomembranes must be flat when backfilled (Koerner, Daniel, ASCE 2007), a recommendation that most agree is difficult to meet with many geomembranes.