The proper ventilation of attic areas is a critical design and performance consideration. If implemented correctly, proper ventilation methods can help ensure the maximum service life of roof assembly materials, and can improve energy efficiency of the building. The minimum amount of ventilation required is defined by
Read more →Snow and ice accumulation on steep-slope roofs can lead to ice dams at the roof eaves. Ice dams are typically formed by the repeated thawing and freezing of melting snow or backing up of frozen slush in gutters. When ice dams occur, water can be forced under
Read more →Ventilation is: Attic ventilation is the flow of outside air through the space at the underside of the deck of an asphalt shingle roof system. The benefits of ventilation are: Ventilation moves heat and moisture out of an attic space. Ventilation helps to prevent premature shingle deterioration
Read more →When the time comes to reroof an existing asphalt shingle roof, a decision must be made whether to remove the old shingles or apply new shingles directly over the existing layer. Most building codes define the options as follows: Reroofing: The process of recovering or replacing an
Read more →Reviews the causes, prevention and correction of buckled shingles. Description Buckling is the result of asphalt shingles not laying flat due to the wrinkling of the roofing underlayment or the movement of the wood deck. Causes During the summer months we normally experience high humidity, and as
Read more →Defines the maximum slope for normal shingle application and suggests different installation methods for slopes beyond that maximum. Over the last few years, architectural design trends have resulted in radical departures from normally accepted roofing concepts. Roof slopes, especially in mansard design, have been increased to the
Read more →For many years, roof discoloration caused by algae has been observed throughout the United States and Canada. The discoloration usually has a brown to black appearance, and may be mistaken for fungus growth, soot, dirt, moss, or tree droppings. Gloeocapsa magma is probably the most prevalent of
Read more →The International Building Code (IBC) and the International Residential Building Code (IRC) require that roofing nails be utilized to fasten asphalt shingles. Proper nailing is essential to good performance. To ensure proper nailing during shingle application it is required that you follow the IBC and IRC nail
Read more →Introduction Asphalt shingles have been used successfully in various climate zones around the world, including desert and tropical regions, for over one hundred years. Improved application efficiency and, more importantly, enhanced long-term shingle performance can be achieved by following the recommendations outlined below for hot weather storage
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