Specialty Building Systems | Duradek Northeast is the exclusive distributor of Duradek and Durarail in the Northeastern states. For your deck, balcony or flat roof deck and railing needs in the Philadelphia, PA area, please contact us to be connected with a trained and authorized Duradek applicator. Duradek professional applicators will provide you with beautiful, waterproof outdoor living space that comes with the industry’s best warranty. Specialty Building Systems has been the face of Duradek in the northeast for over 25 years, with a new generation of ownership proudly representing Duradek since 2014. For more information on our deck and flat roof deck waterproofing systems, contact Tyler.