Because awnings are installed on the exterior of the home to protect windows and outdoor entertaining areas from the effects of weathering, they are prone to the growth of algae, mold and mildew. Unfortunately, simply washing the fabric with soap and water is often not enough to remove the green stains caused by algae; you will need a more concentrated solution.


Step 1: Move all items away from the awning area or use protective coverings on unmovable ones (such as cars). Mix together in a bucket 1 part hydrogen peroxide and 6 parts water, then pour some of this mixture into a spray bottle.

Step 2: Spray the awning with the solution and leave to sit for 30 minutes. Then, spray some water onto the fabric to wash away the grime. You may need to repeat this process to completely clean it.

Step 3: Proceed to wash the awning. Working in small sections, scrub at the fabric with a soft brush and soapy water (be sure to do so gently). Once you are finished, rinse the area and leave to dry.

Step 4: Mix together a solution of 1 part vinegar and 1 part water. Pour into a spray bottle and apply to the awning; this will help protect it from the growth of algae in the future. Leave to dry.

Step 5: Purchase a produce that will help to restore the waterproof finish of the awning, as the presence of algae indicates that it is no longer intact. Apply it according to the manufacturer’s instructions and leave to dry.

Step 6: If you have been unsuccessful in completely removing the algae or it is quite thickly packed on, the best solution may be to call a professional. They will use a specialised pressure cleaner to remove these growths.

Before you attempt to remove algae from your awning, it is recommended that you test the cleaning solution on an inconspicuous area (usually somewhere on the inside) to make sure that it isn’t going to ruin the fabric or colour. You should also clean the surface from top to bottom, as this will avoid streaks developing and will ensure that the finish looks its absolute best.