Rot in timber can be identified by cuboidal cracking (brown rot), which attack the cellulose fractions of the wood. Fibrous stranding (white rot) attacks all potions of the wood; all white rot is a form of wet rot. Brown rot can either be wet rot or dry rot (serpula lacrymans).
As already established dry rot is a brown rot and is further identified by a mycelium growth, which may have lilac/yellow patches, and peels like a mushroom. Strands may be present and growth may extend through non-wood materials. For example: soil, plaster and mortar. Fruiting bodies are formed, reddish brown in colour with margins. Large numbers of rust red spores may also be detected.
There are a variety of wet rots (brown/white rots) and these can be identified in numerous ways. The remedial treatments are very similar and so the most important factor is to distinguish a wet rot from a dry rot.
Most rots are caused by faults on a building, such as leaking roofs, damaged rain goods, overgrown foliage and high ground levels, allowing water to penetrate the fabric of the building. Airborne spores can then settle on the moisture and this is when fungi are created, which will attack the timber.
As with any form of rot, the cause must be identified and corrected. Structurally weakened, unsound timber should then be repaired or replaced as required. Timber should then be treated using fungal sprays and organic wood pastes, either by surface saturation or direct injection into the timber. Due to the nature of dry rot, further treatments are usually required; the rot can grow undetected throughout the building. Therefore plaster work will need to be removed and the walls should be treated with masonry biocides.
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