Can Mastic Asphalt screeding solutions be used as an Air and Vapour Control Layer?

Photo of IKO Permascreed LI mastic asphalt screeding

A Mastic Asphalt Screed can provide the Air and Vapour Control Layer (AVCL) necessary to avoid a build-up of condensation in a flat roof construction. An advantage of taking this approach is that the Mastic Asphalt Screed can also be laid to falls, thereby helping to achieve the roof drainage requirements at the same time. […]