The Do’s and Don’ts of Roof Cleaning

Your roof is the primary shield for your home, protecting it from the harsh Chicagoland weather. Over time, dirt, algae, moss, and other debris can build up, not only creating an unsightly appearance but also posing a risk of long-term damage. Cleaning your roof is essential maintenance, but it must be done correctly to avoid harming your shingles and ensure your safety. With over 50 years of experience, our family at Berg Home Improvements has seen it all. We’re here to provide the proven advice you need to protect your most valuable asset.

Here are the essential do’s and don’ts to keep in mind:

• Do: Prioritize safety with proper gear and a secure ladder.
• Don’t: Use a high-pressure power washer, which can strip shingles.
• Do: Use gentle, approved cleaning solutions.
• Don’t: Ignore dark streaks, as they can lead to bigger problems.

DO: Prioritize Safety Above All Else

Before you even think about cleaning, your first priority must be safety. Working on a roof is inherently dangerous. Make sure your ladder is secure and positioned on a flat, stable surface. Wear slip-resistant shoes with good traction, and never work on a wet or windy day. Having a spotter on the ground is also a wise precaution. If you feel at all uncertain, it’s always best to call a professional. No amount of cleaning is worth a serious injury.

DON’T: Use a High-Pressure Power Washer

One of the biggest mistakes homeowners make is using a high-pressure washer on their roof. While it seems like a quick way to blast away grime, the intense pressure can strip the protective granules off your asphalt shingles. These granules are essential for reflecting UV rays and protecting the shingle from the elements. Losing them will significantly shorten your roof’s lifespan and could even void its warranty.

DO: Use the Right Cleaning Solution

So, if pressure washing is out, “what are the safest methods for removing moss and algae?” The best approach is to use a gentle, low-pressure rinse combined with a proper cleaning solution. A mixture of 50% water and 50% household bleach is effective for killing moss, algae, and mildew. Simply spray it on, let it sit for about 20 minutes (without letting it dry), and then rinse it off thoroughly with a standard garden hose. There are also many commercial roof cleaning products available that are specifically designed for this purpose.

DON’T: Ignore Algae and Moss Growth

Those dark streaks you see on your roof aren’t just dirt—they are a type of algae called Gloeocapsa magma. While initially a cosmetic issue, this algae can retain moisture, which encourages the growth of moss. Moss is even more damaging, as its roots can lift and curl shingles, allowing water to penetrate the roof deck. Addressing these growths promptly prevents them from causing rot and structural damage.

Many homeowners ask, “How often should I clean my roof?” A general rule is to inspect your roof annually and clean it as needed, typically every one to three years, depending on the amount of shade and humidity your roof is exposed to.

Your Trusted Roofing Experts

While routine cleaning can extend the life of your roof, sometimes you need a professional eye. At Berg Home Improvements, our comprehensive roof inspections can identify underlying issues before they become costly problems. If your roof shows signs of widespread damage or is nearing the end of its life, we provide honest recommendations and transparent pricing for repairs or a total roof replacement.

Protect your investment with expert care. If you have concerns about your roof’s condition, contact us to schedule a consultation with our experienced roofing specialists.