Rot is one of the most serious issues homeowners in London can face, particularly in older properties or buildings with inadequate ventilation and damp protection. Both dry rot and wet rot can cause significant structural damage if left untreated, but they differ in how they develop and spread. Understanding the best treatments for each type of rot is essential to protect your home and maintain its long-term value.

Dry rot – able to spread in no time

Dry rot is often considered the more severe of the two because of its ability to spread rapidly through timber and even across masonry. Caused by the fungus Serpula lacrymans, dry rot thrives in damp, poorly ventilated areas and can quickly weaken wooden beams, floorboards, and joinery. The best treatment begins with eliminating the source of moisture, as the fungus cannot survive in dry conditions. A professional surveyor will identify how water is entering the property, whether through leaks, rising damp, or condensation and recommend remedial measures. Once the source is controlled, the affected timber is removed and replaced, while remaining areas are treated with specialist fungicidal solutions to prevent recurrence. In severe cases, masonry sterilisation may also be required, as spores can penetrate brickwork and reactivate when moisture returns.

Wet rot – very present across London

Wet rot, although less aggressive, can still cause significant problems in London homes. It is caused by a variety of fungi that feed on damp timber, usually in areas with consistent water exposure, such as leaking roofs, faulty plumbing, or poorly maintained window frames. Unlike dry rot, wet rot tends to remain localised to the damp area, but the damage can be extensive if left untreated. Treatment typically involves repairing or replacing the source of moisture, removing decayed timber, and applying wood preservatives to protect surrounding structures. Improving ventilation and ensuring the property is adequately damp-proofed also play an important role in preventing wet rot from reoccurring.

Very present across London

Because London has a large number of historic and period properties, treating dry and wet rot can be particularly challenging. Older homes often have hidden voids, original timber beams, and solid walls that make it difficult to detect problems until they have advanced significantly. This makes regular inspections and professional surveys essential, particularly in basements, lofts, and ground-floor rooms where damp is most likely to occur.

Treatments that will make a lasting difference in time to come

Ultimately, the best treatments for dry and wet rot involve a combination of eliminating moisture, removing affected materials, and applying professional fungicidal or preservative solutions. Homeowners in London should never ignore early warning signs such as musty odours, cracking or shrinking timber, or the presence of fruiting bodies and spores. Prompt action can save thousands in repair costs and ensure the safety and stability of the property. With expert guidance and the right remedial measures, even severe cases of rot can be successfully treated and prevented from returning.