Prune trees with branches that hang close to the shed roof.
Mold in shed roof.
For unpainted wood you can use a stronger solution of 1 cup of bleach for every 3 cups of water.
You can also install a layer of zinc flashing just below the ridge of the shed roof as zinc will prevent mold forming when it interacts with rain water.
The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae gloeocapsa magma.
In both cases fill a second bucket with plain water.
For painted wood sheds use a mixture of 3 4 cup bleach into a gallon bucket of water.
Once it is present then it can be treated by using the proper products depending on your level of damage.
Spray the entire roof thoroughly.
Your first line of defense when it comes to preventing mold and mildew in your outdoor storage building is ventilation.
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Commonly found in climates with warm humid summers it does no damage to the roofing but it certainly does looks bad.
Shed mold and mildew can be treated by prevention first.
Use a long handled brush to scour the surface of the shingles and loosen stuck on.
It is a good idea to inspect your shed roof every 6 months.
The right ventilation and controlling humidity is the first step.
Using shingles that contain copper will discourage mold and mildew from forming as the copper will react with rainwater to kill mold.
How to get rid of algae on the roof.
Another place to install vents is in the soffit under the eaves of the building.
This condensation will cause mould and mildew to form very quickly.
Spraying the roof 1.
If the outside temperature drops any moisture inside the shed will cause condensation on the inside of the shed panels roof floor and possibly other items stored in the shed.
Don t allow dirt and debris to accumulate on your rooftop.
A dirty environment is more conducive to mold growth than a.
Eliminate as much dampness as possible around your shed.
Both of these are good solutions.
Mix up your cleaning solution.
A ridge vent in the shed s roof and gable vents allow hot air to escape without allowing rain to enter.
Mix up a solution of bleach and water to use for cleaning your shed.