Old Cottage Renovation & Thermal Insulation

This timber-frame cottage, situated in a conservation area, is around 400 years old. The ground floor shows signs of rising damp, with visible tide marks and damp patches reaching up to two feet high. In some areas, cladding has been added, which has conveniently masked the extent of the dampness related problems.

There are also salt crystallization related damage on several walls. When the plaster contains a high concentration of salts, these tend to absorb moisture from the air—especially during wet weather—causing the damp patches to become more pronounced.

The project involved the comprehensive replastering and thermal insulation of the cottage using breathable lime plasters, chosen for their suitability to deal with the dampness, to maintain the historical integrity of the building while providing modern comfort. A primary focus was the ground floor, which required extensive attention due to evident signs of moisture damage. The targeted areas included the dining room, sitting room, entrance hall, and pantry.

The work started with the careful removal of all cementitious non-breathable materials, followed by a full lime replastering of these areas. Then, lime thermal plasters have been applied to all exterior walls, enhancing energy efficiency by providing superior thermal insulation. Some internal walls have also been replastered with a lime-aerogel thermal plaster. This being heat reflectant it reflects the heat back into the room, improving thermal comfort.

The applied breathable solutions facilitated a healthier indoor climate, while the improved insulation significantly enhanced the warmth, comfort and usability of these vital spaces.