Proctor Air

Proctor Air ® is an air permeable low resistance (APLR) underlay for pitched roof applications.

While the majority of APLRs in use today utilise an airtight, vapour permeable, film layer to achieve their performance, Proctor Airs’ SMS (Spunbond Meltblown Spunbond) structure allows high levels of airflow in addition to the transport of moisture vapour, making the formation of condensation virtually impossible.

Independent studies of the effect of air permeability have confirmed that lofts using air permeable underlays have more consistent air-flow through the roof than those found in traditionally ventilated lofts, according to BS5250, so whatever side of the vents/no vents debate you sit on, Proctor Air has it covered.

Its heavyweight 170gsm three-layer structure also containing a hydrophobic in every layer, gives a Class W1 rating under the latest EN13859-1 specifications.