Best way to insulate stone wall?

Remove internal wall material to bare stone, build studwork with the capacity to use full fill cavity insulation before reinstalling internal drywall

Best way is to apply EWI insulation

Thinner materials such as calcium silicate based insulation board and aerogel based blanket are best applied directly to the masonry. Thicker materials, like fibreboard and hemp board, are best held in place with framing. Thermal or cold bridges should be avoided as far as possible when insulating a wall.

Installing rigid insulation boards to the wall or building a stud wall filled in with insulation material such as mineral wool fibre. Internal insulation is generally cheaper to install than external wall insulation.

Natural materials like rock wool, cellulose, or hemp insulation can be effective options, as they allow vapour to pass through while still providing thermal insulation.

plasterboard with insulation

Insulating an old cottage with a stone wall can be challenging, but there are several effective methods:

1. Internal Insulation: Install insulation on the interior side of the stone walls. This can be done by adding stud walls and filling the cavity with insulation material. This method retains the exterior appearance of the stone while providing insulation.

2. External Insulation: Apply insulation to the outside of the stone walls. This involves adding a layer of insulation material and then covering it with a protective finish, such as render. External insulation can be more complex and costly but is effective in preserving the internal space.

3. Cavity Wall Insulation: If there is a cavity between two layers of stone, cavity wall insulation may be an option. However, not all old cottages have a cavity, so this method depends on the construction style.

4. Natural Insulation Materials: Consider using natural insulation materials like sheep's wool, wood fibre, or cork. These materials are breathable and can work well in older buildings.

5. Damp Proofing: Before insulation, address any damp issues. Stone walls can be prone to damp, so ensure proper damp-proofing measures are taken to prevent moisture-related problems.

6. Professional Assessment: Have a professional assess the cottage's specific conditions and recommend the most suitable insulation method. This ensures a tailored approach based on the cottage's unique characteristics.

Always consult with a qualified professional to determine the most appropriate insulation method for your specific cottage. Each building is unique, and the right solution will depend on factors such as construction type, budget, and preservation considerations.

For an old cottage with a stone wall lacking insulation, one effective method is internal insulation. This involves fixing insulation boards or stud walls with insulation between them directly onto the interior surface of the stone wall. Alternatively, external insulation can be applied by fixing insulation boards to the outside of the wall and covering them with a protective render or cladding. Both methods help retain heat and improve energy efficiency, but consult a professional to determine the most suitable approach for your cottage's specific circumstances.

With a thick breathable product, rock wool materials or cellulose boards. Leave at least a 50mm gap from outer wall.