Mar-flex Waterproofing and Building Products offers complete basement waterproofing systems, as well as many different solutions to repair and maintain the space. One of the most important parts of any foundation/basement are proper vents and venting. Most feel that the foundation walls, once back-filled, aren’t anything to worry about until they develop issues. Vortex vent systems, by Mar-flex, are the most durable, versatile, and quality foundation vent solutions in the marketplace. Vortex vents are the only adjustable vents in the marketplace, able to fit any job, without the hassle of storing many different sized vents. Choose Mar-flex for the best quality vents in the industry.