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847-696-1643 dunneroofingco@comcast.net

Commercial

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Flat, or low sloped roofs CAN present unique problems for the building owner. Many material applications for flat roofs can be unreliable.  Unskilled installation of good materials will lead to the failure of the roof system.

Dunne Roofing has good solutions for any flat roof. A roof that will finally give you peace of mind, and confidence that your roof is water tight for MANY years to come.

Built Up Roof (BUR)

A Built up roof, commonly known to consumers as a “tar” or “tar and gravel” roof. is a system composed of three to five layers of asphalt felt laminated with coal hot tar, pitch or hot asphalt. Finished with a flood coat of the pitch or asphalt.  Frequently gravel is added for UV protection, or the application of a reflective coating.

As with any roof system, proper installation will determine the actual service life of the roof.

Modified Bitumen

Modified Bitumen (MB) is asphalt that has had modifiers added to it to give it plastic or rubber-like properties. The most common types of modifiers being used are APP (Atactic Polypropylene) and SBS (Styrene Butadiene Styrene).

Modified comes in rolls, with a variety of surfacings available, such as  granules, aluminum, copper, or an aggregate (added after installation) such as gravel or slag.  A modified roof system can be torched down, or hot mopped applied, consisting of a one, two or three ply system.  APP is torched applied, SBS can be torched or hot mopped.

We have seen 15 year old modified installations that are still functioning relatively well, on the other hand we have replaced five year old installations.  Quality installation is imperative on this system for longevity.  The average one ply modified system can be expected to last 9 – 10 years.

TPO ( Thermoplastic Polyolefin Singleply Membrane)

TPO has been used in the U.S for over 15 years and has  received widespread acceptance.  It provides long term stability in an outside environment. Dunne Roofing can provide you with installation of a worry free TPO Roofing System.