Roof Mold: How to Clean Your Roof & Prevent Regrowth

These microscopic organisms are now in an ideal position to spread.  Whether via an open window or an air conditioning unit, it can easily make its way into your home, triggering allergies and reducing the overall hygiene of your lifestyle.

While the jury is still out on its effectiveness compared to commercially available roof cleaning solutions, the following remedy is often cited as effective:

• One quarter bleach
• Three quarters water
• ...and a dash of trisodium phosphate

A representative of House Washing Brisbane suggests spraying the roof with a large hand pump spraying device, then letting it sit for 15-20 minutes.  If it doesn't fall away under a brush, repeat the entire process until it does.

If you're concerned about nearby trees or plants, spray them generously with pure, clean water first.  This will drastically reduce the risk of damage from bleach spray.

When you're done, very thoroughly rinse away the solution with a hose to prevent the bleach from damaging the roof shingles.

Your first priority is to deal with nearby branches, vines, or anything else that might prevent direct sunlight and a good air flow.  Remember: these organisms are far more likely to thrive in a damp, dark, closed-in area.

Zinc strips are an excellent way to prevent the regrowth of mildew and mold.  Installed near the top ridge of your roof, water will carry traces of the metal down as it rains, triggering a chemical reaction that will slow - if not outright stop - further growth.

You can also purchase dedicated roof cleaning solution, which you can simply apply annually and leave to do its job.  With the right precautions first time around, you'll find it's a job that can get progressively easier each year.