Stoneleaf Iron is an entry level breather roof underlay membrane which provides a barrier to minimise the wind uplift load, wind driven rain, snow and dust, as well as transporting any unwanted moisture resulting from ingress through the primary roof coverage into the roof drainage system. Product conforms to the requirements of BS5534:2014 when installed within a ventilated cold pitched roof construction. BBA approved for use within cold and warm unventilated pitched roof construction and for use in a Vertical Application.
Stoneleaf Iron Underlay 50x1m
Size: 1mx50m roll
Water vapour transmission: 0,020 MNs/g
BBA Certified, Agrément Certificate 13/5026
Additional batten must be laid on Laps where batten gauge is over 250mm in Zones 1-5 according to BS 5534 : 2014, clause A.8