Carlisle Construction Materials is the only roofing manufacturer to produce all three major roofing membranes – EPDM, TPO, and PVC – and is the world’s largest manufacturer of EPDM, TPO, and polyiso insulation. Carlisle’s more than 55 years of manufacturing experience are reflected in its innovative, durable products, all of which are designed to enhance roof system performance. Today, billions of square feet of warranted Carlisle roof systems protect buildings worldwide.