The roof is an essential element of a home since it insulates from heat and cold but above all it protects against bad weather.
As a result, when it is invaded by moss, algae or lichen, its solidity and its protective role are called into question. To prevent the structure from becoming fragile, here are some tips that will certainly help you.
Tiles, shingles, slates... no roof escapes the attack of lichen, moss or algae, it's a fact. The orientation of the house is one of the elements responsible for the problem. When it is not sufficiently exposed to the sun, the roof becomes a perfect nest for the development of moss. This is why it happens that only part of the roof is infested by this unsightly green layer. The problem is mainly favored by excess shade and humidity. The presence of trees in the surroundings is a contributing factor to this appearance.
The degree of inclination also matters a lot. When the slope of the roof is relatively low, this increases the humidity of the material and consequently causes more moss to appear. So that it is no longer invaded, the roof must be able to dry out as quickly as possible after the rain. The installation of waterproof insulation as well as quality ventilation is always recommended.
As soon as they notice a moss infestation on their roof, homeowners immediately tend to try all the techniques in the hope of getting rid of it quickly. However, some of them are not only ineffective but risk amplifying the problem. Such is the case with the use of bleach. Although it is an excellent disinfectant, this product reduces the porosity of the roofing material, making it even more fragile in the face of humidity.
The use of high pressure water jets is also not recommended. This technique can remove the cullet from the tiles which then become less watertight. In addition, carrying out this process yourself is relatively dangerous, especially if you do not know the appropriate safety rules.
One of the first effective techniques is to protect your roof from moisture. In this context, water-repellent solutions will be essential. These will prevent water infiltration. Commercially available product is usually applied by spray or brush. The ideal is to apply several layers for an optimal result. But beware, there are certain roofing materials that are not able to withstand this shock treatment. You should therefore be sure to seek advice from the store clerk or your roofer before starting the operation. Do not hesitate to use anti-foam or algaecide for a curative treatment. The price fluctuates around 20 euros for a container with a capacity of 20 liters.
Do not forget to follow the safety instructions before going up on the roof. First, always make sure you have someone else assist you because the operation is a source of danger. Always wear non-slip shoes. Preferably bring a ladder specially adapted for roofing work and, if possible, use a safety harness. Never leave tools lying around in the areas surrounding the operation. Store them in a carpenter's belt, it's much safer. And if you don't feel like doing such work, call a professional, here for example, requests for quotes are free!
Last point:never intervene in case of rain, snow or strong wind. Be aware that at height, you can be the victim of gusts which destabilize you and which can lead to a fall.
