Wet Roof Timbers

Possible causes of wet rot are.

Wet roof timbers.

These wet rot fungi get their food by breaking down the walls of wood cells. Small yellow patch of wet rot on dark wood panel by mätes ii. The most common of these wet rot fungal species is cellar fungus. How wet rot occurs.

Discussion in roofing and guttering started by dougiem 21 dec 2009. Timber in the roof can also be at risk especially where there is roof damage allowing rainwater to run onto the roof timbers. Unpainted and untreated timber exposed to water from roof. Wet rot occurring in the upper flooring and roof timbers is less common than in ground floor timbers due to ground floor timbers potentially being in closer contact with damp soil areas and rising damp and less likely to be seen.

Condensation water arising from lack of ventilation to roof or floor timbers especially with hollow floors. We have provided some photographs as examples of wet rot. Modern timber roofs are mostly framed with pairs of common rafters or prefabricated wooden trusses fastened together with truss connector plates timber framed and historic buildings may be framed with principal rafters or timber roof trusses roofs are also designated as warm or cold roof depending on how they are designed and built with regard to thermal building insulation and ventilation. C wikipedia wet rot is less common a problem than dry rot and is often caused by the timbers being exposed to above average levels of moisture or humidity accelerating the natural decay of timber and is often caused by an external issue such as a structural problem or a leaking pipe.

Wet rot is a general term that is often used to describe various fungal species that are responsible for wet rot. Reply 10 on. Wet rot is commonly found in cellars roofs and in timbers around windows. This often comes from sources like defective plumbing gutters downpipes or stone pointing.

Timber damaged by wet rot. Wet rot very simply put is a natural decay of timber in the presence of high moisture. When excess moisture infiltrates timber it can allow fungal spores to germinate and grow this eventually leads to the timber losing its strength. Timber suffering from wet rot will feel spongy even through a coat of paint and look darker than the surrounding timber.

Wet rot is often first noticed when floors especially ground floor floor joists become springy under foot. January 06 2009 08 31 08 am looking at your picture the roof trusses are quite young and would be treated in manufacture i e. Wet timbers in my loft. In order to grow wet rot requires a regular source of moisture.

Own work cc by sa 3 0 via wikimedia. 18 feb 2009 messages. Vac vac and are quite resistant to rot. Page 1 of 2 1 2 next dougiem.

When dry the timber will easily crack and crumble into fine particles.