Dry Rot Remediation

In July 2025, our team was instructed to investigate suspected timber decay at a residential property located in Enfield. The client had reported signs of deterioration in the ground floor front room, prompting a full inspection. Our survey confirmed the presence of dry rot (Serpula lacrymans), a serious fungal decay that compromises structural integrity and spreads rapidly under damp conditions.

Following our detailed report and recommendations, we were awarded the contract to carry out the remedial works. This case study documents the project from initial survey through to completion, highlighting the diagnostic process, treatment strategy, and restoration phases.

Our inspection revealed extensive dry rot affecting skirting boards, floorboards, and joists in the front room. Moisture readings were high, with up to 100% WME recorded in masonry near the fireplace. Blocked air bricks and poor ventilation had created humid conditions, leading to visible mycelium growth, advanced timber decay, and a notable structural risk.

The observed decay within the property was attributable to a combination of underlying defects. Chief among these was significant moisture ingress, which resulted from a historical issue with an external drain. Additionally, rising damp was present due to a failed damp-proof course (DPC), further exacerbating the moisture problems. Dampness originating from the fireplace hearth contributed to the elevated moisture levels in the affected area. Poor subfloor ventilation was also a major factor, allowing humidity to persist and preventing the area from drying out adequately. The dry rot had spread beyond the visible surfaces, necessitating a full strip-out and sterilisation of surrounding masonry.
In late September 2025, Essex & Anglia Preservation Ltd commenced remedial works to address the extensive dry rot identified in the property. The programme of works began with the careful strip-out and disposal of all affected timbers and finishes to fully expose the extent of the fungal decay. Once the area was cleared, the team carried out masonry sterilisation to eliminate any residual fungal spores and injected a remedial chemical damp-proof course to prevent further moisture ingress.

During the second week, new pre-treated timbers were installed to replace the decayed structural elements, ensuring long-term protection against future outbreaks. Air bricks were also fitted to improve subfloor ventilation, addressing one of the root causes of the problem. The reinstatement phase followed, including re-plastering and the restoration of finishes, leaving the treated area dry, stable, and ready for decoration. The works were completed within the planned two-week timeframe, restoring the integrity and safety of the affected section of the property.