After decades in a humid environments, mold, natural and dark plankton, and fungus can begin to grow on your ceiling. Fungi can have an especially detrimental impact on your ceiling. Unlike plankton, a infection does not rely on photosynthesis to produce its own food; consequently, it must feast on natural material that is discovered in many roof structure components such as road Cedar roofing Surrey shingles. Indeed, tar is actually fossilized natural issue and the primary source of nutrition for fungus.