When Choosing a Flat Roof Is the Right Decision
Flat roofs are a great manner in which to keep a structure safe from water. Understanding exactly what to do with a flat roof will ensure you have a working roof system that will last a very long time. Your roofing contractor Des Moines IA can guide you through this process to help you make the best decision.
Though they might look great, and are very common, flat roofs do need regular maintenance and in-depth repair work in order to successfully avoid water infiltration. If this is done properly, you’ll enjoy with your flat roof for a long time.
Flat roofs aren’t as glamorous and/or popular as its newer counterparts, such as slate, tile, or copper roofs. However, they are just as crucial and require much more interest. In order to avoid throwing away money on short-term repair works, you must know exactly how flat roof systems are designed, the different kinds of flat roofs that are available, and the importance of routine assessment and upkeep.
A flat roof system works by supplying a water resistant membrane over a building. It includes one or more layers of hydrophobic products that is put over a structural deck with a vapor barrier that is normally placed in between the deck and the roof membrane.
Flashing, or thin strips of product such as copper, intersect with the membrane and the other building elements to prevent water seepage. The water is then guided to drains, downspouts, and rain gutters by the roof’s slight pitch.
There are 4 most common types of flat roof systems. Noted in order of increasing durability and expense, they are: roll asphalt, single-ply membrane, multiple-ply or built-up, and flat-seamed metal. They can vary anywhere from as low as $2 per square foot for roll asphalt or single-ply roofing that is applied over and existing roof, to $20 per square foot or more for brand-new metal roofs.
Used given that the 1890s, asphalt roll roofing typically includes one layer of asphalt-saturated natural or fiberglass base felts that are used over roof felt with nails and cold asphalt cement and typically covered with a granular mineral surface area. The seams are normally covered over with a roofing substance. It can last about 10 years.
Single-ply membrane roofing is the most recent kind of roofing product. It is typically used to replace multiple-ply roofs. 10 to 12 year guarantees are normal, but proper installation is crucial and maintenance is still required.
Multiple-ply or built-up roofing, also referred to as BUR, is made of overlapping rolls of saturated or layered felts or mats that are sprinkled with layers of bitumen and appeared with a granular roofing sheet, ballast, or tile pavers that are utilized to secure the underlying products from the weather. BURs are designed to last 10 to 30 years, which depends on the products utilized.
Ballast, or aggregate, of crushed stone or water-worn gravel is embedded in a finish of asphalt or coal tar. Because the ballast or tile pavers cover the membrane, it makes inspecting and preserving the seams of the roof difficult.
Finally, flat-seamed roofs have been utilized because the 19 th century. Made from little pieces of sheet metal soldered flush at the joints, it can last numerous years depending upon the quality of the product, upkeep, and direct exposure to the elements.
Galvanized metal does need routine painting in order to avoid corrosion and split joints have to be resoldered. Other metal surface areas, such as copper, can become pitted and pinholed from acid raid and typically needs replacing. Today copper, lead-coated copper, and terne-coated stainless-steel are preferred as lasting flat roofs.