Lichen or black mould on your roof?
Wet & Forget is non-acidic, non-caustic and contains no bleach and will not damage any surface.
Here are a few tips for when you apply Wet & Forget to your roof to get rid of lichen and/or black mould:
For an average 3 bedroom tile roof with lichen you would require 3 x 5 litre packs depending on the total area covered with lichen.
For best results mix the Wet & Forget and spot spray the lichen, leave for 10-15 minutes and then respray the lichen and the entire roof to ensure the lichen absorbs the Wet & Forget thoroughly. The first application is to dissolve the waxy surface. The 2nd spray will then penetrate the lichen.
The average 3 bedroom tile roof is approx 150sq mts, but because of the undulations of the tile profile the actual area is a lot bigger. Therefore an average tile/concrete roof would require 2 x 5 litre packs, depending on how porous the surface is and how much biological growth is present. For green moss and black mould one application is normally sufficient.
If you are on tank water disconnect the water supply to your tank for at least the first 10mm of rain or 2 good downpours to avoid any chance of contamination. Check before reconnecting that the water flowing onto the ground, when raining is not foaming.
Simply dilute as per instructions on the bottle into a household garden sprayer or backpack sprayer.
If badly contaminated, apply a second application one month after the first.
Wet & Forget is best applied in overcast dry conditions to avoid rapid evaporation.
Spray the affected area to the point of saturation. DO NOT hose off.
DO NOT apply if rain is expected within 12 hours.
The time it takes for an infested surface to become clean depends on the type and intensity of biological growth.
Black mould and Lichen will take 6-8 months and badly contaminated surfaces can take 12 months.
Here at Wet & Forget we always promote safety first so always ensure that you are safely harnessed to your roof and never walk on the section you have just sprayed as it will be slippery until it is dry.
Wet & Forget is not systemic or hormone based and is safe around plants, however a slight discolouration may occur if allowed to dry on the leaves of delicate plants. To avoid this, simply mist surrounding plants with water, before and after spraying Wet & Forget.
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