Roof Moss Removal
Roof moss is a common feature on roofs that are north facing which means they are exposed less to sunlight. When you allow large patches of moss to grow on your roof, it can lead to costly repairs or long term damage which means the roof needs to be replaced. Moss can retain water on your roof surface thereby damaging the timber frame that supports the roof.
Moss are flowerless plants that retain moisture and form dense green clumps or mats. They have no roots, spread by releasing spores like other plants and thrive in damp or shaded areas. Small amounts of moss are harmless but as they spread quickly they need to be treated. If untreated, it can degrade the entire roof structure. As they grow in the cracks between each roof shingle, with time it lifts and loosens the shingles allowing water in that results in leaks. Usually, the seams between the shingles allow moss growth because they are shaded.
Is it bad to have moss on your roof?
Moss is harmful to your roof. It holds moisture on the roof which can cause problems for roof tiles especially in freezing conditions. The tiles begin to crack and therefore expose your property to elements. Small patches of moss may not harm your roof at all. However, as they spread by releasing spores, those small patches can grow in a very short time.
Moss on your roof tiles lead to wood rotting and blocked drainage points. It means water may collect on some areas of your roof with blocked drainage. Overall, this will shorten the lifespan of your roof.
Your roof needs to be maintained and kept clean otherwise roof moss can reduce the lifespan of your roof.
Should moss be removed from your roof?
Avoid costly roof repairs and expensive replacements by getting rid of roof moss quickly if it covers significant areas of your roof. While the pressure washing option looks attractive for moss removal, it should be avoided as it could damage the roof tiles and affect the roof interior.
It is also important to clear out moss off your roof as they prevent water drainage by blocking gutters, outlets and drainage points on your roof thereby damaging the tiles of your roof. A properly functioning roof drainage system also prevents the roof from freezing to pieces.
The best way to remove moss from a roof
There are several options to consider when removing moss from a roof. Some great options and some not so great options. Pressure washing may look like a great option. While effective, it could lead to long term damage to tiles and shingles. Chemical treatments with the wrong products may also damage the tiles or shingles of your roof thereby creating a significant problem.
There is also the DIY approach and hiring an experienced roofing contractor. We highly recommend the latter as they have specialist equipment and the expertise to clean and treat your roof thereby preventing a reoccurrence.
If you need to remove moss from your roof yourself you need the following:
An experienced roof contractor is equipped to clean your roof and apply moss resistant treatment thereafter. The roof will be covered with a primer that needs to dry up a few hours later. After the drying period, the actual coating can be applied to the roof. Moss resistant products do not stop moss formation entirely but it restricts growth harshly.
Usually, cleaning your roof only means you may not have moss for at least 6 – 12 months but with moss resistant treatments you are unlikely to have an occurrence of moss in many years
Best time of the year to remove moss
Moss thrives in damp cold environments. Usually, the beginning of spring, autumn or mild winter are great environments for moss growth. Roof moss does not do well when there is a lot of sunlight so summer is not a great time for moss growth.
Besides, if your property is around a lot of trees or trees that have branches close to your roof, you will likely experience moss growth. It is advisable to trim all trees around your property to clear the area so that your roof gets sufficient sunlight.
The best time of the year to remove moss is when it is actively growing. This is usually in the autumn rains, mild winters and the early spring months. Just before autumn peak rains are the ideal time for roof moss treatments.