Failing to properly maintain and repair minor roof issues during their early stages is a major cause of many roof problems. One of the best times to inspect your roof is once the winter is over, in the springtime; check for damage that may have occurred during the winter months.
The following are some of the most common problems that you will experience with today’s commercial roofing systems:
Surface Deterioration: Over time, all roofing materials will deteriorate due to exposure to weather elements at rates that are mainly determined by how the roof was exposed and the kind of materials it is made out of. In general, inorganic materials have a tendency to deteriorate at a slower rate than organic materials. If there are spots of deterioration showing, then the membrane needs to be inspected for potential water infiltration issues.
Moisture Ponding: A poor roof installation may cause voids within the membranes, drains may be blocked, and may result in water ponding occurring on the roof. Some other causes can be an improper slope, drains that are blocked by debris, and HVAC units that do not have the right condensation lines. UV Rays that are added to ponding moisture may have negative effects on a roof. Before ordering repairs, the source of what is causing ponding water must be investigated first. Always thoroughly inspect for the causes before you make any repairs.
Poor Support for Roof Equipment: Your rooftop might be used to store many kinds of mechanical equipment – bracing, signs, flag poles, antennas, ladder struts, etc. They should not be put on top of a roof unless it is absolutely necessary and never place or mount it directly on top of your roof membrane. Have them mounted onto a raised curb-type support or a solid support structure. Curb flashings or flat flange then may be implemented in order to keep your roof watertight. Roof replace and recovery can then occur without removing or disturbing your equipment.
Blistering: This occurs when your roof system has voids. Voids may show up due to debris that is trapped, from skips within the bitumen mopping, uneven substrates, membranes that are not properly relaxing, or gases that are trapped due to materials having moisture in them. Throughout the day, as it continues to get warmer, moisture and air are trapped in voids continue to expand. Pressure developing inside the void stretches flexible, warm membranes and then displaces them that results in a blister forming. During the night, the membrane will cool and get stiff, and won’t return to its original shape. That creates a vacuum within the blister, with more air getting drawn into it via tiny cracks inside of the membranes. If there are only a couple of blisters, usually they won’t result in problems, as long as these blisters don’t get too large and remain watertight. If the blister ruptures, it can result in moisture reaching the interface and degrading the membrane’s strength. Due to that, it is essential to not break blisters. Avoid stepping on blisters, especially when the roof membrane is cold. In the event that a rupture occurs, the blister will get too large, or the blister will pull apart the seams. A repair will most likely be necessary if that happens.
Penetration Flashing: Penetrations that go up and through a roof membrane usually are flashed in one of two main ways. Small vents and single pipes use metal-flange flat flashings that are directly installed on top of the roofing material and then stripped in. Larger penetrations and smaller penetration groups use curbs that are made out of wood, concrete or metal that is flashed in and will normally have metal counter flashings that are installed with them as well.
Fastener Back-Out: Usually, back-outs are caused by shortcomings with the shank length, fastener heads, stress plates, poor thread design, or the nature of the drill points. If back-outs are discovered, check your roofing system to determine whether it is likely that other back-outs will occur or not. If many fasteners appear as if they are starting to back-out or have backed out already, instead of having repairs done, you might need to consider getting a roof replacement.
Taurus Elite Commercial Roof Systems, 512-332-4422, provides commercial roofing services to Austin, Texas and the surrounding communities, including Leander. This includes commercial metal roof repair, commercial metal roof restoration, commercial metal roof replacement and commercial flat roofing services. We have been providing professional commercial roofing services to the area for over 20 years. When you need repairs completed on your commercial metal roofing system, call us.