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Roofing mastic is a product used to seal roofs to prevent water penetration. It comes in different types and can be applied with putty knives or caulking guns. It can extend the life of a roof and is flexible to withstand weather conditions. It can also be tinted for energy efficiency and is given a rating for durability. Professionals can provide advice on proper products and application methods.
Roofing mastic is a roofing product used to seal a roof so that water cannot penetrate. Several types of products are referred to as mastic; in general, roofing mastics are tacky and dry to a pliable, rubbery finish after being applied and allowed to cure. Many hardware stores sell these products and they can also be ordered by special arrangement. When people are arranging for a roof to be replaced or repaired by professionals, they may ask what products will be used.
One form of roofing mastic is a sealant or cement that is used on any area of the roof where water seepage might occur, such as along the edges of the flashing, at seams and corners, and on nails and screws. It can come in buckets, allowing people to apply it with a putty knife, or in tubes that can be inserted into a caulking gun. When people periodically inspect roofs, it’s important to check the areas where the caulk has been applied to confirm that it isn’t peeling, cracking, or flaking.
Another type of roofing mastic is a roofing sealant designed to be applied to the entire roof, usually in several coats. It can be used to extend the life of a roof by waterproofing it. The mastic can be applied with rollers, sprayers and other devices. It essentially creates a membrane over the existing roof that resists water penetration and protects the underlying structure. If a roof is badly damaged, putty can’t fix it, but an aged roof can be made to function for several years with one coat of putty.
Either way, the putty is designed to be flexible. It will expand and contract without breaking, allowing it to survive variable weather conditions. The waterproofing will last as long as the roofing caulk remains elastic and won’t crack or chip. It can be tinted various colors for energy efficiency or to coordinate with an existing paint and roofing scheme. Applying white mastic to a roof can help reflect heat and significantly reduce cooling costs in hot climates.
Roofing mastics are given a rating that estimates how long they will hold up and in what environments. The more UV radiation a roof is exposed to, the quicker the caulk will break down. A roofing professional can provide advice on proper products and application methods and inspect a roof to determine if further repairs are needed.
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