Versico's T-Top and Square Top Vents are designed to allow air to flow freely through the vent while preventing water from infiltrating the roofing system. VersiWeld TPO T-Top and Square Top Vents are constructed using TPO Detail Membrane, which provides enhanced flexibility and allows for the elimination of T-Joint Covers at three-way membrane intersections. VersiFlex PVC T-Top and Square Top Vents are constructed using KEE HP Membrane, which provides excellent long-term weathering protection.