roofing underlayment

 Breathable waterproof membrane

synthetic roofunderlayment roof felt

     KDBG115 breathable membrane is a synthetic roof underlay membrane, made of polypropylene. It is a functional membrane, it main function is to make the roof or wall breathable. The membrane is not only breathable, but also waterproofing. Because of this function, it can allow moisture to get out of roof or wall easily, and when the moisture meet cold tiles or shingles, it will be condensation as water-drop, and flow away on the breathable membrane, thus keep the inside insulation dry, avoid wet or mouldy.

KangDa waterproofing and breathable roofing membrane

Breathable Membranes allow insulated structures to easily release excess moisture vapour into the atmosphere and so keep the internal components of wall and roof structures dry, whilst performing the task of a secondary protection membrane and preventing penetration by external environmental impurities such as dirt and rain. These types of membrane are installed on the cold side, or the external side of the insulation beneath the main outer building lining, roof-tiles or cladding.

KangDa Air permeable membrane for roof