When looking for roof cleaning services there can be conflicting advice on which method is best for removing unsightly stains from a roof. These algae, moss and lichen stains not only look bad, but they can also cause damage to the roof as they feed off the material within the shingles. The longer they are left untreated the more damage they can cause to the roof. Roof cleaning Woking and nationwide will usually be one of these 3 stain removing methods.
- Low Pressure Eco-Friendly
This method is becoming more popular with roof cleaning contractors as it uses eco-friendly cleaning products without toxic chemicals. The low pressure wash is also less damaging to sensitive roofs. This technique is the most costly of the roof cleaning methods.
- Chlorine Bleach
Chlorine bleach is mixed with chemicals and applied several times to a roof to remove algae, moss and lichen. This method is cheaper but may take a few weeks for the stains to be completely gone, as the chemicals will kill the stains but not take them away. Usually the stains will wash away with rain.
- High Pressure Power Wash
High pressure washes are often used to remove stains from a roof. If no chemicals or cleaning products are used, it can take a while for the power wash to remove the stains, and the time for them to re-grow will be much shorter. Depending on how powerful the wash is, it can sometimes be damaging to a roof.