You may be unsure of when a roof cleaning is necessary. If you have ever looked up at your roof and noticed black streaks on your shingles, then most likely it is algae growth. Algae often grow on roofs in areas where water or moisture collect, then the spores reach the roof by a combination of birds and wind.
On the other hand, noticeable green fuzzy areas on your roof, most likely reveal moss growth. Shaded areas and moisture create an ideal environment for such types of growth.
To learn more about what to do once growths are identified, please read the following answers to common roof cleaning questions.
To clean the roof or let it be?
Though algae won’t destroy your shingles, it can negatively affect their performance, especially in the case of a reflective or cool roof. Black algae growth does interfere with the reflective properties of the roof.
The main reason for keeping your roof clean is to extend its overall lifespan as well as the shingles and adjacent roofing material. It’s best to avoid anything that can cause shingle edges to curl upward, since this may cause the roof to blow off during windy conditions.
The idea of climbing on top of a roof to hose it down and apply chemical cleaners to eliminate algae or moss may seem stressful. However, the National Roofing Contractors Association advises against do-it-yourself ideas for working on the roof, including cleaning it. Roof tasks should be left to the care of professionals.
Other potential hazards with roof cleanings are the likelihood of cleaning products such as bleach reaching garden plants or vegetation growing near the home. Our expert roofing contractors know to take precautions and water any nearby plants to provide cover and as much protection from chemicals.
What to expect during a roof cleaning?
The primary aim of a roof cleaning is to eliminate and remove all algae or moss growth with chlorine bleach commonly used to kill off spores. The ARMA recommends a 1:1 ratio of bleach to water to clean a roof. It is also advised to avoid using a pressure washer on asphalt shingles, since the force of the water can cause damage.
After 20 minutes of covering the roof surface, the bleach solution should be rinsed away with clean water. The person cleaning your roof might even use a leaf blower to remove any leftover pieces of moss. Lastly, a few rain showers are usually enough to wash off remaining algae from the roof.
When is it time to replace the roof?
Since algae and moss buildup on the roof can make the shingles appear to be in worse condition than they are, a more in depth look at your roof may give hints whether your roof looks worn out or if it just may need a deep cleaning. We can gladly inspect your roof and discuss its current condition. There are no conditions associated with a roof that we are unprepared to handle.
Our professional roof services include repairs, installation, and replacement. Contact us at your earliest convenience so we can go over your most viable options.