It is not always necessary to replace a roof if there is moss growing on it. Moss can damage the shingles, but it’s possible that the roof is still OK. Some good roof moss removal work may be all you need.
Have Moss Removed Sooner Rather Than Later
Moss grows into the structure of a roof shingle and weakens it. On an asphalt roof, moss can cause the granules, that are on the shingle to protect it from the sun, to fall off. On a cedar shingle roof, moss keeps the wood damp for an extended length of time and thus accelerates the rotting and disintegration of the wood.
Therefore, to prolong the life of your roof, it is best to have moss removed as soon as you notice it.
The Moss Removal Process – Always in the Summer
If the shingles are not too damaged already, moss can be removed. This must be done properly to prevent a roof from being damaged.
The first step is to kill the moss before attempting to remove it. This must be done in the dry season. There are some non-toxic products that can be sprayed on to kill moss. After a few hot, dry days the moss will die and the roots will release from the shingles. The moss can then be washed off or lightly swept off. It is important not to use a lot of force when removing well established moss because the roots will be imbedded into the shingles and will cause damage when coming off.
Other Moss Tips
- Moss removal should be viewed as a maintenance Just make sure you get a professional to do it so you don’t damage your roof or void your warranty. Reliable, reputable roof professionals will guarantee their work and have full insurance.
- People living in North Vancouver and West Vancouver must watch out for moss especially. Moss is so common and prevalent in these areas because of the wet weather and the trees and mountain side enclosing the area.
- Moss will always build up more on the north side of a building.
- There are products like Zinc strips that can be applied to help prevent moss build up. This approach will meet with some success but it is does not work 100% in all situations.
- Some shingles are advertised as “algae resistant”. However, they do not prevent moss so don’t let anyone try to sell them to you as a way to prevent moss build up. They do work for algae growth which really just discolors the shingles.
- On flat roofs, zinc pellets work very well to reduce moss growth.
If roof moss is a problem for you and your home, contact specialists in the field for removal, advice and maintenance.
As a renovator Doug did many rot repairs which gave him a good understanding of where and why buildings leak, and how to prevent it. He realized the need for a different approach to roofing; one that educated the customer enough to make good decisions. With better trained installers and a quality inspection process Absolute Roof Solutions was born…” Read more.
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