NRCA's Repair Manual for Low-slope Membrane Roof Systems will help you identify problems and permanently repair low-slope roof membranes. Learn the most reliable long-term repair procedures for built-up, polymer-modified bitumen, thermoplastic and thermoset roof systems. With instructions for more than 150 repairs, the manual is designed to be used on job sites. The NRCA member price for the manual is $115, and the retail price is $230. Purchase it here.