The Versatile Inlay for Today's New Generation of Johns Manville Roofing Substrates Combining the Advantages of Polyester and Glass Fiber Mat in One Single Product.

The market demand for so-called combi-inlays to produce bitumen roofing substrates is continuously increasing. Johns Manville, one of the leading manufacturers of high-quality products for the building industry has acted on this demand with our DuraSpun® Premium inlay. Our glass fiber and polyester scientists and engineers, using state-of-the-art technology, successfully joined forces to develop an inlay which uniquely combines the advantages of polyester and glass fiber mat in a worldwide first.

Highly tear resistant and flexible polyester mat is combined with dimensionally stable, specially prepared glass fiber mat by a unique needling technique yielding a form-locked compound without negatively influencing the glass fiber mat properties while improving the burn behavior at the same time.

DuraSpun® Premium can be processed into polymer bitumen roofing by any bitumen roofing manufacturer using the standard manufacturing method and standard bitumen types. DuraSpun® Premium is, of course, also suited for other areas of application like sound protection or flooring. Johns Manville's product range includes glass fiber mat, glass fiber fabric, and polyester inlays which are processed in manufacturing roofing substrates of different qualities worldwide. Johns Manville is the only single-source supplier of high-quality inlays of this kind.