UNDERLAYMENT APPLICATION - - For roof slopes from two units vertical in 12 units horizontal (17 percent slope), up to four units vertical in 12 units horizontal (33 percent slope), underlayment shall be two layers applied in the following manner. Apply a minimum 19 inch wide (483 mm) strip of underlayment felt parallel with and starting at the eaves, fastened sufficiently to hold In place. Starting at the eave, apply 36 inch wide (914 mm) sheets of underlayment overlapping successive sheets 19 inches (483 mm) and fastened sufficiently to hold In place. In place of this, onelayer of 30 pound felt can be installed in the same manner. For roof slopes of four units vertical in 12 units horizontal (33 percent slope) or greater, underlayment shall be one layer applied in the following manner. Underlayment shall be applied shingle fashion, parallel to and starting from the eave and lapped 2 inches (51 mm), fastened only as necessary to hold in place. ICE DAM PROTECTION - In areas where the average daily temperature in January is 25 F (-4 C) or less or where there is a possibility of ice fanning along the eaves causing a backup of water, an ice barrier that consists of at least two layers of underlayment cemented together or a self-adhering polymer modified bitumen sheet shall be used in lieu of normal underlayment and extend from the eave's edge to a point at least 24 inches (610 mm) inside the exterior wall line of the building. I hereby certify that there are no willful misrepresentations in, or falsifications of, the information written in the application. I am aware that should the investigation disclose and falsification, I may be subject to a fine.