Manufactured by Permavent, the latest range of breather membranes LETO are  for use in warm non-ventilated and cold ventilated roofs. A three layer construction with two layers of non-woven polypropylene and  a microporous film between to form a breathable waterproof membrane.  A high quality material to regulate humidity and moisture levels and control condensation in the buidling. 

We stock two weights; 145 & 175 gsm in both 1m and 1.5m roll widths. 

BBA Approved