ASPHALT SHINGLE CLEANING 101

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 in 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 that 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? The black streaking typically found on homes in areas where moisture settles on shingles is not caused by mildew or fungus; it's roof algae.

3M scientists have identified the most common form as Gloeocapsa Magma. Algae spores are carried by the wind, which is why so many houses in the same neighborhood can end up with this problem. During the last 20 years, this particular algae strain has become hardier and so has been able to migrate to less humid environments than it has in the past. And in areas where it traditionally has been found, the staining is showing up earlier, is more severe and settles on a greater number of roofs.

HOW CAN IT BE CLEANED? Typical roof cleaning methods involve either pressure cleaning or chemicals solutions containing Chlorine Bleach or Sodium Hydroxide. If used properly, these methods will clean the roof with minimal adverse impact - but the effects can be very temporary and will generally have to be repeated every 6-18 months in order to maintain the appearance of the roof.

WHAT IS THE BEST CLEANING METHOD? Each method has its advantages and disadvantages. 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 the 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

THESE METHODS ARE NOT A LONG-TERM SOLUTION. While these methods are relatively safe and effective when done properly, repeated use will lead to premature aging of the roof. The natural erosion that occurs over time from the basic forces of heat, cold, wind, and rain alone are enough to weaken most roofs to the point where annual inspections and minor repairs are necessary to prevent significant repair costs. But when the roof is repeatedly subjected to high pressures or harsh chemicals, the aging of the roof structure is significantly accelerated. With repeated cleaning, tiles are more likely to shift, slip, or break and asphalt shingles are more likely to become brittle and crack. When this happens, there is a greater likelihood of tearing the roof membrane simply by walking on the roof. Once gaps are created in the roof and subsequent pressure cleaning or chemical cleaning takes place, these gaps provide the water or caustic solutions a path to the roof membrane and increase the chance of costly roof leaks.

WHAT IS THE ALTERNATIVE? A proper program of preventative maintenance will eliminate the need for future cleaning and the potential for damage that comes along with it. Preventing the recurrence of the algae growth will require a light spray of chlorine and water or an algae prevention product. 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 any 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 note 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 could find themselves facing fines up to $10,000. per occurrence.

ASPHALT SHINGLE CLEANING 101
A How To on Effective Asphalt Shingle Cleaning Done Safely And Correctly. Please Visit ShingleRenew.com for Videos Demos, and more information including a safe effective Asphalt Shingle Cleaning Recipe.

Solar Energy Roof Shingles
It is down to each and every one of us to do our bit towards protecting the future of the environment. Solar energy roof shingles are an excellent way to do your bit.

Strong Winds Can Damage Your Roof
If you live in a state prone to strong winds that may damage your roof; you probably should check with your zoning commission, a professional roofing association in your area, or a government agency on what roofing materials are required or recommended for use in your hometown

Considering Roof Shingles? - Roofer911.com
Shingles cover 80% of America’s homes, but they are far from being all the same. Today’s shingles come in a large variety of colors, styles, and materials to meet any homeowner’s demands. Before we look at the different types of shingles available there are some other elements we should first consider.

Pressure Wash Your Roof (Not Recommended)
If you are looking to rid your roof of algae, debris or other unwanted presence, pressure washing your roof is not recommended

Why Clean the Roof? - Roofer911.com
There are a number of roof cleaning issues that if left unchecked, can wreak havoc on shingles, shakes, and tiles, eventually leading to deterioration of the roof structure itself. This article will discuss some of the signs of trouble, the causes, and some of the cleaning methods used to eliminate potential problems. Preventative measures are always less expensive than repair or replacement costs.