Hi, My summer house has black Felt roof tiles, these have been on for 4 years and been fine, but last year they started to turn yellow with Lichen and this year has got really bad, what's the best way to clear this, I don't want to damage it so not sure if chemicals will be OK. Many Thanks
Lichen on felt roof tiles
- Thread starter DaveOC
- Start date
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S
Sombrero
pressure washer? bleach poured down the roof?
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