How to Clean Roof Shingles Without Damaging Them

Cleaning roof shingles might be one of the most difficult areas of the house to clean. Aside from the large surface area to cover, you’ll need to get up there with the equipment and make sure nothing falls that could damage other areas of the home. In this article, we will look at how to clean roof shingles effectively and safely. 

 

How to Clean Roof Shingles Step-by-Step

Step 1 – Inspect Your Roof First

The first step in how to clean roof shingles is actually getting up there first to inspect the roof. You don’t want to be cleaning the shingles where there is damage. If there are damages, such as cracked shingles, the water you use may seep in and cause a leak within the house. Before you begin, look for damage, such as cracked, loose, or curling shingles. 

If you find any damage, we strongly recommend calling our team at JP Roofing to have us fix it before any cleaning. If nothing is found, then you’re good to go on to the next step. 

Step 2 – Protect Landscaping

The next step is to protect other areas of the house, particularly the landscaping. Cover your plants and landscaping with tarps to block direct overspray from cleaning solutions, or rinse frequently to dilute any accidental spill. You want to minimize contact between cleaning solutions and plants and flowers, as they can harm vegetation. 

 

Step 3 – Apply Cleaning Solution

When applying the cleaning solution, use a low-pressure sprayer (under 100-300 PSI) to coat the affected areas gently. Let the solution sit for about 15-20 minutes (check the product label for the specific timing), but do not let it dry completely. You also want to generously apply the solution from the top down, in sections. 

 

Step 4 – Rinse Gently

Once you let the solution sit as per the product instructions, rinse it with a garden hose from top to bottom, ensuring you push the residue off. Remember never to spray water under shingles or against the grain, as it can potentially damage them. If there are still solutions left, you can repeat rinsing to remove them completely. 

 

Step 5 – Allow to Dry Naturally

Let the roof dry naturally. If there is moss or algae, which can turn brown/black, do not scrub it aggressively, as it may damage the granules. These mosses and algae will often flake off over a few days, especially when there’s rain, which will wash them away. 

To prevent future growth, you can install copper or zinc strips along the ridge, which contain ions that inhibit algae.

 

What NOT to Do When Cleaning Shingles

Don’t Use a Pressure Washer

You may think that using high-pressure water is effective for cleaning dirt from surfaces, especially stubborn dirt. It may seem so, however, that isn’t always the case. In fact, high-pressure water can strip shingle granules over time, leading to leaks and shortening your roof’s lifespan. Instead, opt for gentle pressure, like a garden hose without a nozzle jet.  

Don’t Use Harsh Chemicals Without Checking

For the most part, strong chemicals are not the best option for cleaning roof shingles. This is because certain products can harm shingles and corrode gutters. When looking for cleaning products, always verify the manufacturer’s guidelines to ensure they are suitable for use on your roof. 

 

Don’t Walk Excessively on Your Roof

Cleaning the roof can be dangerous, particularly if it is steep and high. As a result, if you opt to clean your own roof, make sure you don’t walk too much on the roof. In addition to potential roof damage, there is a risk of injury. Remember that cleaning roof shingles involves some safety measures. 

When in doubt, get a professional to handle the project; they’re trained and have all of the necessary equipment to complete it effectively and safely. 

 

Roof Shingle Cleaning FAQs

How often should I clean my roof shingles?

Most roofs should be cleaned every 1–3 years, depending on your local climate and exposure to moisture. If you notice dark streaks, moss, or algae, it’s time to clean.

Is it safe to use bleach on roof shingles?

Yes, a diluted bleach solution (usually mixed 50/50 with water) is widely used to eliminate algae and moss. However, it must be sprayed correctly and thoroughly washed to avoid damaging the shingles and the surrounding landscape.

Can I clean my roof myself, or should I hire a professional?

If your roof is low and accessible, you may be able to clean it yourself using proper techniques. However, steep or high roofs, as well as those with existing damage, should be left to professionals such as JP Roofing to avoid injury or damage to shingles.

Will roof cleaning damage my shingles?

Only if done incorrectly. Using pressure washers, harsh scrubbing, or harsh chemicals can strip granules and reduce your roof’s life. Stick to low-pressure rinsing and soft application methods.

How do I prevent algae and moss from coming back after cleaning?

Install zinc or copper strips near the roof ridge to help prevent growth. Also, trim overhanging tree branches to reduce shade and moisture buildup.

 

End Note

Cleaning roof shingles is essential for keeping your roof clean and in good condition. However, using improper techniques can actually damage the roof rather than maintain its cleanliness and integrity. Therefore, it’s crucial to undergo a cleaning process that’s effective and safe. If you’re still unsure about how to clean roof shingles without damaging them, contact JP Roofing. Our team will do every step properly and safely.