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Elements that can have an effect on roofing granules

There are several factors that can cause granules to loosen and be removed from bitumen roof shingles.

Cleaning the roof with high water pressure can blast granules from roof shingles.
Extensive winds, storms or heavy rainfall can also be factors
Small hail can displace roofing granules.
Any foot traffic can cause granules to remove.

My gutter is filled with granules. Is there a problem with my shingles?

Not necessarily. An excessive amount of granules are applied during the shingle manufacturing process to make sure that the bitumen on the roofing sheet is completely covered. It is important to completely cover the sheet with granules so that the bitumen is not exposed to ultraviolet light. In accordance to the EN 544 the value of the loss of granules may not exceed 2,5 g (test procedure EN 12039). But IKO does better than that. IKO’s own maximum limited value is 1,2 g!

Aspects and warnings

It is not a mistake if a couple of granules appear after a storm if your roof isn’t that old. But if your roof is old and most of the granules are peeled off, you should consider replacing it as this can be a big concern.
The easiest way to do this is to be physically on the roof and check the asphalt shingles. If you see many spots without granules and there is only the top coating of bitumen left, it could mean that it’s time to replace your shingles.
Remember that regular maintenance and inspection of your roof will extend its life by many years.

Resume

Roofing granules are made from crushed stone and minerals. With today's advanced manufacturing techniques, these granules allow roofing manufacturers to create asphalt shingles of virtually any color, size and shape. These small colored stones are one of the most important parts in the composition of asphalt shingles together with bitumen as well as the supporting inlay from fiberglass. Learn more about the shingle production process.

Want to take a closer look to certain colours of our range? Request up to 3 A4 samples!

Style 4: Tropical Breeze

With their blend of functionality, aesthetics, and durability, Cambridge roof shingles are an ideal match for the tropical lifestyle. Colours Harvard Slate (50), Earthtone Cedar (49), and Autumn Brown (53) harmonize with the needs and beauty of a tropical environment.

The Cambridge Xtreme 9,5°'s natural colors are not the only reason this roof shingle is a perfect match for palm trees and sandy beaches. Thanks to the self-adhesive backside it also offers protection against tropical storms.