Roof Moss Removal
•Plastic Bristle Brush •Non-Pressurized Rinse •Organic Treatment
Preparation before the cleaning-
- Groomed landscape is covered, if needed, to prevent physical damage or covering it with moss and debris.
- Downspouts are filtered to prevent moss from entering them and clogging above or underground.
- Above ground drainage is assessed and controlled to preserve your basement and landscape.
Cleaning the roof-
First, roof cleaning is done using plastic bristle brushes (we do not use wire brushes) to remove larger moss. Next, smaller moss is rinsed loose using a garden hose with a stream nozzle (we do not use a pressure washer). These two steps remove a minimum of 80% of the moss immediately. Often we can remove up to 90% gently. Then, organic treatment is used to treat the very small remaining moss, which is killed in place and left to shrink and weather off. Lastly, if you're available, we show you around, answer questions and alert you to any concerns.
When we leave the property:
- 80-90% of the moss has been removed from your roof
- Gutters are clean / downspouts clear (unless you've requested otherwise)
- Treatment has been applied
- Landscape and hardscape have been swept/raked or rinsed clean of fallen moss
- Good clean moss compost and gutter debris is all in your yard debris bin or bags or compost pile.
F. A. Q.
How Do Other Companies Do Roof Moss Removal?
High Risk Methods:
Pressure Washing- High or Low Pressure - Removes all visible moss and algae. Immediate results.
- Risk factors: Indiscriminately removes a layer of asphalt shingle granules anywhere the stream cleans. Worker must be very skilled to avoid removing excess granules or lifting shingles with the water pressure or when working around fixtures to avoid causing leaks. Worker and company must be properly insured to pressure wash roofs (this is a specific insurance provision). The pressure/power washing method leaves root-like systems behind so the moss will often return rather quickly and be able to sink deeper into the shingles with that layer of granules freshly removed.
Metal/Wire Brush - Allows for spot removal and removes embedded, difficult, dry or dormant moss.
- Risk Factors: Unyielding metal bristles easily damage shingle edges and remove protective shingle granules during moss removal. Asphalt shingles are flexible, soft in the heat, brittle in the cold or with age. The shingle and granules give way before the metal does.
Somewhat Lower Risk Methods:
"Soft Wash" - Removes moss and algae with the combined use of pre-treatment chemicals and a low pressure wash.
- Risk Factors: Chemicals used to pre-treat the moss require experience, training and extreme caution to prevent damage to landscape or other living things that may come in contact with the chemicals. Workers must be very skilled to avoid removing excess granules or lifting shingles with the water pressure or when working around fixtures to avoid causing leaks. Worker and company must be properly insured to pressure wash roofs (this is a specific insurance provision).
Chemical Pre-Treatment and Delayed Removal - Full size moss is saturated with a chemical and left in place to die for weeks before removal.
- Risk Factor: Chemicals used to pre-treat the moss require experience, training and extreme caution to prevent damage to landscape or other living things that may come in contact with the chemicals. Chemicals remaining on the roof in the interim will be subjected to rain and wind in the absence of the worker who applied them. This makes it challenging at best for the hired company to insure that landscape, ground water, gutter overflow, etc are not being subjected to toxins.
Staying Ahead of the Game:
After removing the moss, keeping the roof clean and free of accumulating debris and staying ahead of the moss are vital to the life of your roof. Whether you do it or we do, a maintenance program is necessary for the life of the roof. We'll help you make a schedule to stay one step ahead and you won't have to worry. See our "Services" page for more info about roof moss removal and treatment. See also our "Pricing" page to get an idea of our prices. Also, check out Nextdoor for our references.