ONDUTISS AIR: A RANGE OF EFFECTIVE ROOF UNDERLAYMENT FOR MAXIMUM WATERPROOFING
ONDUTISS AIR breathable membranes are composed of 3 layers. The bottom and the top layers are non-woven and the layer in between provides the waterproofing.
Vapor Diffusion Thickness – Sd (m)
With an Sd value between 0,02 and 0,04; ONDUTISS AIR has a structure with a certain water vapor permeability.