Des Moines Commercial Roofing Systems for Flat Roofs

des moines commercial roofingDes Moines Commercial Roofing Systems for Flat Roofs

Flat roofs are excellent to keep a building safe from water. Knowing precisely what to do with a flat roof will guarantee you have a working Des Moines commercial roofing system that will last a long time.

Though they may look great, and are very common, flat roofs do require regular upkeep and comprehensive repair work in order to effectively avoid water infiltration. If this is done correctly, you’ll be happy with your flat roof for a very long time.

Flat roofs aren’t as glamorous and/or popular as its more recent counterparts, such as slate, tile, metal, or copper roofs. However, they are just as important. In order to avoid losing money on short-term repair works, you should know precisely how flat roof systems are created, the various kinds of flat roofs that are available, and the value of routine evaluation and maintenance.


A flat roof system works by offering a waterproof membrane over a building. It includes several layers of hydrophobic products that is put over a structural deck with a vapor barrier that is typically put 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 parts to prevent water seepage. The water is then guided to drains pipes, downspouts, and rain gutters by the roof’s slight pitch.

Four Types of Materials

There are four most typical kinds of Des Moines commercial roofing systems for flat roofs. Listed in order of increasing resilience and cost, they are: roll asphalt, single-ply membrane, multiple-ply or built-up, and flat-seamed metal. They can range anywhere from as low as $2 per square foot for roll asphalt or single-ply roofing that is used over and existing roof, to $20 per square foot or more for brand-new metal roofs.


Utilized since the 1890s, asphalt roll roofing generally includes one layer of asphalt-saturated natural or fiberglass base felts that are applied over roof felt with nails and cold asphalt cement and typically covered with a granular mineral surface area. The joints are typically covered over with a roofing substance. It can last about 10 years.

Single-ply Membrane

Single-ply membrane roofing is the most recent kind of roofing product. It is frequently utilized to change multiple-ply roofs. 10 to 12 year guarantees are normal, but correct installation is essential and maintenance is still needed.

Mulit-ply and Build up

Multiple-ply or built-up roofing, likewise called BUR, is made from overlapping rolls of saturated or layered felts or mats that are interspersed with layers of bitumen and appeared with a granular roofing sheet, ballast, or tile pavers that are used to protect the hidden materials from the weather. BURs are designed to last 10 to 30 years, which depends upon the materials used.

Ballast, or aggregate, of crushed stone or water-worn gravel is embedded in a finish of asphalt or coal tar. Given that the ballast or tile pavers cover the membrane, it makes examining and preserving the joints of the roof difficult.

Flat Seamed Roofs

Finally, flat-seamed roofs have been used in the 19 th century in Des Moines commercial roofing systems. Made from small pieces of sheet metal soldered flush at the joints, it can last many decades depending upon the quality of the product, maintenance, and direct exposure to the aspects.

Galvanized metal does require regular painting in order to avoid deterioration and split joints have to be resoldered. Other metal surfaces, such as copper, can end up being pitted and pinholed from acid raid and generally requires replacing. Today copper, lead-coated copper, and terne-coated stainless-steel are favored as long-lasting flat roofs.

If you need more information on Des Moines commercial flat roofing systems, please give For Sure Roofing a call today.

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