How to Clean a Roof: Car Ports

What You'll Need
Garden hose
Pressure washer
Soft-bristled brush
Telescoping brush handle
Protective gloves and goggles
Rust remover
Scouring Pad
Step ladder

To keep a clean roof on your carport, it's important to make sure you clean it regularly. This will prevent a build up of grime and make sure that you have early warning of any potential maintenance issues. The cleaning process may vary slightly depending on the material that the car port is built from but it should be possible to apply the steps below to any carport.

Step 1 – Clear Moss and Debris

When a carport is shaded by a house or some trees than you can expect to get a build up of moss or mildew on the roof. In addition other debris such as leaves and twigs may fall or be blown onto the roof. Mix up a solution of bleach and water in your bucket. A concentration of 1 part bleach to 4 parts water should be strong enough. Use the pressure washer to apply the solution to the roof taking care to make sure that any areas of thick growth are thoroughly soaked. For safety wear the protective gear when applying the bleach solution. Leave it to soak in for 10 to 15 minutes then wash it off with the pressure washer or garden hose. For areas where there has been a large build up growth then you may need to repeat this process until it is all gone.

Step 2 – Trim Back Trees

While you wait for the bleach solution to loosen the moss on the roof you can trim back any trees or other vegetation that may overhang the carport. As well as shading the carport and encouraging moss growth it is also possible that the branches will cause damage to the roof in strong winds if they are not kept trimmed. If a number of birds use the branches for roosting then their droppings can also make the roof unsightly and cause damage.

Step 3 – Check for Rust

If your carport roof is metal then you should check it for any areas of rust or metal oxidation after clearing the debris. Use a rust remover on any areas that you spot. You may need to use a scouring pad to clear some of the more stubborn rust. Be careful not to lean too hard on the roof, it may be easier to purchase a scourer that can be attached to a telescoping pole.

An aluminum carport will not rust but you will need to be wary of oxidization of the metal. Oxidization causes the metal to look more dull and can be combated with a metal polishing paste.

Step 4 – Dissuade Birds from Landing

To help keep your carport clean it is suggested that you take some measures to prevent birds from landing on it or flying underneath to roost. Block any ledges or areas that they could rest on and either sprinkle or mist strong smelling spices around the area. These extra measures may help to gain you a couple of months between washes.