How to Repair Granular Loss on Roof: Tips and Tricks

April 27, 2023

A roof is an essential part of any house or building. It is designed to protect the interior from weather elements such as rain, wind, snow, or sunlight. However, over time, the roof may experience various damages, including granular loss. This kind of damage is caused by continuous exposure to harsh weather elements or poor roofing materials. As a result, the granules on the shingles start to fall, leaving the roof exposed to further damage. A roof with granular loss requires immediate repairs; otherwise, it may lead to more significant problems over time. In this article, we will discuss some tips and tricks on how to repair granular loss on the roof.

Identifying Granular Loss

Granular loss is easily recognizable. You may notice black, bald spots on the shingles, or small granules on the gutters or downspouts. Also, the amount of granules that have been lost will determine the level of the damage. A close-up inspection of the roof may reveal whether it requires a quick fix or a complete replacement.

Tools and Materials

Before you start the repair process, make sure you have the necessary tools and materials. These include a ladder, safety harness, nail gun or hammer, roofing nails, shingles, roofing cement, and a sealant gun. Ensure the ladder is tall enough to reach the roof's top, and the safety harness secures you in case of accidental falls.

Repairing Granular Loss on Roof

The following are some tips and tricks to repair granular loss on the roof.

Step 1: Clean the affected area

First, use a broom or brush to remove all loose granules on the damaged shingles. A thorough cleaning will help you identify the extent of the damage and prepare the surface for repair.

Step 2: Replace damaged Shingles

If the damage is extensive, replace the damaged shingles with new ones. Carefully remove the damaged shingles by splitting them along the adhesive line using a knife. Remove the broken or damaged shingles with a pry bar, being cautious not to damage the adjacent shingles. Apply roofing cement to the exposed area and attach the new shingles. Nail them in place, ensuring the nails penetrate the roofing deck without breaking through the roof's underside.

Step 3: Apply sealant

Apply a thin line of roofing cement on the nail head and cover it with granules to ensure a waterproof seal. This also helps to camouflage the nail heads and make them less visible.

Step 4: Add Shingle Adhesive

Add shingle adhesive to the backside of the new shingles' lower portion and press them into place. Apply a nail that penetrates both the underlying shingles and the new shingles.

Step 5: Seal Edges and Eaves

Seal any exposed edges and eaves with roofing cement to prevent water from seeping through the roof.

Preventing Future Granular Loss

Despite the repairs, you need to take steps to prevent future granular loss on your roof. Some of these steps include:

Regular Maintenance

Schedule regular inspections to check the condition of your roof. Address any minor problems to prevent them from developing into significant issues.

Quality Roofing Materials

Invest in high-quality roofing materials that can withstand harsh weather elements. Poor quality materials tend to wear out quickly, leading to granular loss.

Clean Gutters and Downspouts

Ensure your gutters and downspouts are clear of debris to allow proper drainage of rainwater. Otherwise, clogged gutters can lead to water accumulation on the roof, causing the granules to loosen and fall off.


In summary, granular loss is a common problem for roofs, but it can be repaired with proper techniques and tools. Regular maintenance, quality roofing materials, and cleaning of gutters and downspouts, among other steps, can help prevent future granular loss. Always remember, when it comes to roof repair or replacement, it is essential to hire a roofing professional to ensure the job is done correctly and to prevent any further damage.



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I enjoy designing and curating experiences both virtually and in 3-dimensional reality. I have a Bachelor of Architecture from the Illinois Institute of Technology and currently practice professionally, but I also manage a few other ventures.
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