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Home Improvement Information |
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Roof Cleaning - Making Your Old Roof Look Like New!
Many Florida residents that have come from the North are surprised by the idea of roof cleaning - and even more surprised by the fact that many communities here in Florida require it. Reasons for cleaning include aesthetics, property values, energy efficiency, and increased longevity of the roof. Whatever the main reason, if it is going to be done, it is your best interest to know what choices are available to you. A quality roof should last upwards of 30 years if cared for and maintained properly. Unfortunately, many roofs here in Florida (and increasingly throughout the US) are subjected to unnecessary stress while cleaning the greatly reduces the life expectancy of the roof. With repeated roof cleaning comes certain pitfalls that every homeowner, property manager, and professional cleaner should be aware of in order to avoid damage to property, unnecessary repair costs, and the premature replacement of the roof. WHY HAS THE ROOF TURNED BLACK? HOW CAN IT BE CLEANED? WHAT IS THE BEST CLEANING METHOD? A chlorine and water solution can be used followed by a thorough rinse. Of course, since chlorine can be toxic to people and plants, proper care should be taken to protect employees and the surrounding property from overspray and runoff. The benefits to using chlorine include a much faster cleaning process and minimal rinsing as compared to other methods. This translates into much less wear & tear on the roof - particularly asphalt shingle roofs. Sodium Hydroxide based cleaners are generally advertised as safer for the landscaping, but sodium hydroxide is caustic, very toxic, and care should also be used to protect employees and surrounding property. Sodium hydroxide is also a very effective degreaser. So high levels of sodium hydroxide in a cleaning product can cause damage to an asphalt shingle roof that can be irreversible. These products generally require much more rinsing than the chlorine method. The rinsing process is not only time consuming, but it can also be potentially damaging to the roof if not done correctly. A quality sodium hydroxide based product should not require any more than 100 psi to effectively rinse an asphalt shingle roof and even then some granule loss should be expected. Pressure cleaning is an option that should only be used on a concrete, barrel tile, or metal roofs. Pressure cleaning has the advantage of not requiring chemicals, which eliminates some of the cost - in addition to landscaping and chemical exposure concerns. The down side to pressure cleaning is that it is very time consuming and it exerts tremendous force on a surface that is not really designed to handle it. In addition, repeated pressure cleaning can wear away the surface of some tiles that are only covered by a thin layer of coloring. When this happens, the grey concrete color starts to show through and the roof must be stained or painted. THESE METHODS ARE NOT LONG-TERM SOLUTIONS. WHAT IS THE ALTERNATIVE? Most quality algaecides will last for approximately 6-12 months before reapplication of the product is necessary. Obviously, the longer the time frame, the better your chances are of minimizing and unnecessary damage to the roof. Prevention programs should be done in conjunction with neighbors whenever possible and many can be applied without a need for walking on the roof. One important mote about algaecides: Algaecide products are regulated at both the state and federal level. Any algaecide product used on a roof requires EPA registration as a pesticide or biocide and approval for use on a roof. Contractors found violating the law in this regard cold find themselves facing fines up to $10,000. per occurrence. John Browne For additional information on Professional Roof Cleaning and Algae Prevention, please visit our webstite: http://www.Roof-A-Cide.com/ or call 800/806-6727
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