Design & Use Of The Architectural Shingle
Basic 3 Tab shingles from the leading manufacturers come with a variety of options that combine exceptional durability with flexibility for better resistance to blow-off which makes them a great choice for an economical roofing system. In addition to their suitability for residential applications, these products are also ideal for commercial applications.
Some of these shingles have the additional attribute of resisting the growth of algae (commonly called fungus), especially in damp regions. This design feature helps prevent the black streaking commonly seen on shingles in areas with high humidity and rainfall totals. Algae resistant shingles are not available or needed in all regions.
These shingles are generally composed of a fiber glass mat base. They have ceramic-coated mineral granules that are tightly embedded in carefully refined, water-resistant asphalt. The 3 Tab shingles also have self-sealing adhesive and are available in “English” dimensions – 12″ x 36″ and in “Metric” dimensions – 13 1/4″ x 39 3/8″, depending on the product and sales region.
This type of shingle can be used on roofs with slopes greater than 2″ per foot. Low slope applications (2″ to 4″ per foot) require additional underlayment to prevent leakage. In areas where icing along the eaves can cause a backup of water, they must have a waterproofing underlayment such as the CertainTeed WinterGuard™ Waterproofing Shingle Underlayment, or its equivalent, place under the shingles according to application instructions provided with the product and on the shingle package.
Basic shingles come in a wide variety of colors but availability can vary by region. Please refer to the product literature, sample boards, information centers and consult your sales representative to verify color availability.