What is the maximum roof slope recommended for the application of a coal-tar roof?

The recommendation for a maximum roof slope for the application of coal-tar roofing is less than ¼ inch per foot. This specific slope is suggested to ensure that the coal-tar material can adequately flow and settle, promoting proper application and adhesion. Excessive slopes can lead to problems such as inadequate adhesion of the roofing materials and increased risk of water pooling or unsatisfactory drainage, which could compromise the roof's integrity. Understanding the specific limitations for coal-tar roofing helps ensure proper installation practices and longevity of the roofing system, making it a critical piece of knowledge for roofing professionals.