Carlisle offers countless prefabricated, in-stock, standard and custom-order accessories to accommodate even the most difficult and unique rooftop penetrations. No matter what details are present, you can be confident that Carlisle has an accessory to meet your needs, and every Carlisle accessory carries a CFA (Certified Fabricated Accessory) stamp of approval, so you know they are manufactured to the highest standards. These accessories save time and money during installation, and help maintain the watertight integrity of every Carlisle TPO and PVC roofing system.