Powerlon UltraPerm Premium is a 155gsm grade breather membrane roofing felt with BBA and CE certification thats the highest performing roofing felt in the Powerlon UltraPerm range. The high-performance underlay can be used in walls and roofs of timber frame structures in all wind uplift zones. Powerlon UltraPerm Max is manufactured from a non-woven composite membrane thats hydrophobic, meaning its water repellant. With exceptional water vapour transmission and good UV stability, its a great addition to your roofing project for protection and breathability. Powerlon UltraPerm Max can be installed on warm and cold roofs as well as supported or unsupported roofs and both ventilated and unventilated roofs. To make installation of this breather membrane roof felt Powerlon UltraPerm has high nail tear resistance and comes with pre-printed marking lines for your ease. Combined with high tensile strength and being flame retardant to class E, this product is high performance and high quality.  This roll is green in colour in 1.5m x 50m.