Ideally, what needs to be done in your case is fix any roof sagging, lay down 1″ of insulation and screw in a TPO/PVC materials, and weld all the seams. No need to scrape off old coating, as long as substrate is in good shape. Once that is done (correctly) you can forget about...
Coverage: 6 in x 300 ft $125.00 Add to cart Roof Cleaner/Protect - Gallon Coverage: 500 sq ft per gallon $69.00 Add to cart Skylight 911 - Quart Coverage: 25 sq ft. $59.00 Add to cart Gallon Mixer $9.00 Add to cart Location...