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Dry Rot and Wet Rot

Wet rot and dry rot are the two most frequent kinds of wood rot, and both of these types of fungal decay may cause structural damage to structures. Identifying the distinction between wood rot and other types of rot is the first step toward permanently eliminating rot from home. Dry rot is the most destructive kind of fungal decay, capable of wreaking havoc on property and destroying a considerable portion of the wood (Embacher et al, 2020). Wet rot is the more prevalent of the two types of wood rot fungal degradation; however it is limited to areas where lumber is moist. This article discusses the distinctions between dry rot and wet rot, how they spread inside a structure, resulting in wood defects, and how to remove and repair problematic dry rot and wet rot timber.

Dry rot in your house is a major problem that should always be addressed immediately. It is a very damaging kind of deterioration in a structure because it travels away from the source of moisture and damages wood and other structural elements. In comparison to dry rot, wet rot occurs more often but is more limited (Singh, 2020). Typically, the deterioration affects the wood closest to the source of the wet. However, wet rot should not be underestimated. Wet rot, if left unchecked, may cause significant structural damage. Dry Rot is a fungal decay that is produced only by Serpula Lacrymans and is the most devastating kind of fungal rot in structures. It has the potential to spread across a whole structure, destroying the fabric of the structure. According to Goodell et al. (2020), dry rot may attack any exposed wood that gets wet with a moisture content more than 20%, which is relatively common in a property. Wet rot and Dry rot may be caused by faulty interior plumbing or penetrating moisture produced by faulty render, guttering, and downpipes. Both wet and dry rot have the potential to create major damage before a homeowner is aware of the situation, since they may grow under wall coverings and beneath flooring.

Fortunately, distinguishing wet rot from dry rot is not often difficult. While both have a similar structural impact on the timber frames of a house, their visual aspects often distinguish them (Parrett, 2020). Dry rot may be identified by the fungus’s profound breaking impact on the wood. Frequently, the wood will look to be dry, badly broken, and grey or brown in color. Dry rot, if allowed to thrive, may also generate fruiting bodies that release red spore dust. This dust often disperses throughout diseased regions, imparting a musty, mushroom-like odor to the space.

It is important to keep in mind that these qualities may be masked if a coat of paint is applied to a hardwood surface. Despite this, one can clearly detect the wood’s characteristic cracking and the yellowish hue of the internal fibers (van Niekerk et al, 2021). After repairing these parts of wood, you may want to consider refinishing them to complete the process. On the other hand, wet rot is often deeper in color and exhibits apparent deformation or warping (Gabriel & Vec, 2017). Due to the fact that wet rot can only occur in moist surroundings, the wood is damp to the touch, mushy, and structurally unstable. If the rot is allowed to dry out, the diseased wood may split and shatter into little bits. Additionally, fungal development might aid in the identification of damp rot. Numerous homeowners report discovering a black fungus growing on their lumber in the appearance of a mushroom (Vanpachtenbeke et al, 2016). This fungal organism feeds on the fibers of moist wood. Additionally, this fungus will emit a damp, musty odor as it consumes the moist materials.

Dry rot will only attack wet wood, generally wood with a moisture level more than 20%. (Poole, 2018). As a result, eradicating the source of moisture should be the primary objective of any dry rot eradication plan. Timber may get moist due to a variety of factors. The most prevalent culprits include leaky washers, shower trays, and bathtubs, as well as condensation (ura et al, 2018). Outside sources of humidity include leaky roofs, increasing dampness, and dampness infiltrating through walls. Whatever the cause of the moisture, if it is corrected and the wood is allowed to dry out correctly, dry rot may be managed.

Wet rot treatment is similar in that the afflicted wood must be entirely removed and replaced to prevent additional development. It is also critical to determine the source of the dampness that caused the rot to grow in the first place (Rashidi et al, 2021). Internal water sources like faucets and toilets, as well as exterior water spouts and garden hoses, may be used. Following the application of a fungicide, experts suggest applying a wood hardener containing a preservative to harden the surrounding wood and make it less vulnerable to reinfection (Fierascu et al, 2020). Additionally, it is recommended that ventilation be increased in wet sections of the house to maintain the wood robust and dry. This prevents fungal spores from adhering to the wood and deprives them of the necessary environment to degrade and feed on the fibers. Often, it is more beneficial to replace contaminated wood with previously conserved, treated wood in both treatment schemes (Candelier et al, 2016), Pre-treated wood is often stronger and more resistant to infection if it is ever infected. This will aid in slowing the decaying process and minimizing long-term harm.

To conclude, wood is commonly employed in homes and other structures that are susceptible to rot. Wet rot and dry rot are two of the most serious dangers to structural wood. Wet rot and dry rot are both frequent types of fungal degradation in wood. Wet rot needs a greater moisture level to thrive, but dry rot does not. Thus, this is the critical distinction between wet and dry rot. It is not always practicable or practical to guarantee the long-term survival of the timbers. As a result, it is essential to take supplementary precautions to protect against re-infection. Any timbers that have been contaminated should be scrapped and replaced with pre-treated wood. Any remaining timbers at danger of dry rot should be treated with a fungicide. Dry rot should be isolated where it has penetrated the masonry using physical confinement and/or masonry sterilizing.

REFERENCING LIST

Candelier, K., Thevenon, M.F., Petrissans, A., Dumarcay, S., Gerardin, P. and Petrissans, M., 2016. Control of wood thermal treatment and its effects on decay resistance: a review. Annals of Forest Science, 73(3), pp.571-583.

Embacher, J., Neuhauser, S., Zeilinger, S. and Kirchmair, M., 2020. Bacterial community associated with the dry-rot fungus Serpula lacrymans is dominated by Firmicutes and Proteobacteria. bioRxiv.

Fierascu, R.C., Doni, M. and Fierascu, I., 2020. Selected aspects regarding the restoration/conservation of traditional wood and masonry building materials: A short overview of the last decade findings. Applied Sciences, 10(3), p.1164.

Gabriel, J. and Švec, K., 2017. Occurrence of indoor wood decay basidiomycetes in Europe. Fungal Biology Reviews, 31(4), pp.212-217.

Goodell, B., Winandy, J.E. and Morrell, J.J., 2020. Fungal degradation of wood: Emerging data, new insights and changing perceptions. Coatings, 10(12), p.1210.

Parrett, M., 2020. Bored to destruction. Property Journal, pp.48-50.

Poole, M., 2018. Rendering it possible. Building Surveying Journal, pp.32-33.

Rashidi, M., Hoshyar, A.N., Smith, L., Samali, B. and Siddique, R., 2021. A comprehensive taxonomy for structure and material deficiencies, preventions and remedies of timber bridges. Journal of Building Engineering, 34, p.101624.

Singh, J., 2020. Dry rot and timber decay: Don’t panic and poison yourself. Journal of Building Survey, Appraisal & Valuation, 9(1), pp.49-64.

Ţura, D., Wasser, S.P. and Zmitrovich, I.V., 2018. Wood-inhabiting fungi: Applied aspects. In Fungi (pp. 245-292). CRC Press.

van Niekerk, P.B., Brischke, C. and Niklewski, J., 2021. Estimating the service life of timber structures concerning risk and influence of fungal decay—A review of existing theory and modelling approaches. Forests, 12(5), p.588.

Vanpachtenbeke, M., Van den Bulcke, J., De Windt, I., Van Acker, J., Langmans, J., Vereecken, E. and Roels, S., 2016. An experimental set-up to study mould growth and wood decay under dynamic boundary conditions. In WCTE 2016 World Conference on Timber Emgineering (pp. 1589-1597).

 

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