This is EnkaMat ASV metal roof vent

Suitable for application in the most common metal-roof designs, EnkaMat performs as a multifunctional roof vent. It provides ventilation, drainage, a flexible expansion layer and also serves as a thermal break. During rain, sleet or hail, EnkaMat acts as a sound-absorption layer. EnkaMat metal-roof vent is available in two different thicknesses for use in specific roof designs. The three-dimensional product is made of continuous, durable polyamide filaments. These are fused together where they intersect. In addition to above sheeting ventilation, EnkaMat also significantly reduces impact noise and helps create soundproof metal roofs.

EnkaMat is designed for use in metal roofs where a spacer layer is required to provide the ventilation and drainage needed for a long service life. Made of polyamide, EnkaMat resists the rigors of the construction environment, including heavy foot traffic during installation. Installed between the metal roof panels and the waterproof breathable membrane, the mat is dimensionally stable in hot weather and does not become brittle in cold. With its open structure of 95 % void space, EnkaMat metal-roof vent creates an unbroken air space for ventilation and drainage. The resulting natural air flow removes moisture, which can cause mold, mildew, and corrosion. At the same time EnkaMat lets hot air escape and acts as a thermal break. This can create a temperature difference of up to 22°F between the metal roof panels and the membrane. In hot climates, this helps building owners reduce cooling costs. In cold climates, the ventilation prevents moisture from freezing. This avoids the occurrence of cracks and resulting damage to the roof deck. During installation, EnkaMat acts as an anti-slip-sheet making panel placing more comfortable and safer. The metal-roof vent attaches quickly and securely with common fasteners.