Internal wall insulation for older Scottish homes
Cold walls or rooms that won’t warm up?
Cold external walls can make rooms uncomfortable, difficult to heat and prone to condensation. We assess your home and recommend a suitable option, from thin CorkSol SprayCork coatings to thicker insulation systems.
Do any of these sound familiar?
Cold walls often show up as everyday problems such as:
- One room staying colder than the rest of the house
- Walls feeling cold even when the heating is on
- Condensation or mould appearing on external walls, corners or behind furniture
- Rooms taking a long time to warm up and cooling down quickly
These signs can have more than one cause. We assess the property first, check for obvious moisture issues and explain whether thin CorkSol or a fuller breathable insulation system is the sensible option.
Why warmer wall surfaces matter
Condensation can form when warm, moist air meets a cold wall surface. External walls and corners are often colder than other surfaces in the room, which is why mould and staining can appear there first.
Suitable internal wall insulation can make the inside wall surface warmer, improving comfort and reducing the risk of surface condensation.
By slowing heat loss through the walls, insulation can also reduce the energy needed to keep rooms at a comfortable temperature, helping to lower heating bills. Savings depend on the insulation system, the areas treated and how the home is heated.
We also check ventilation, indoor moisture levels and signs of leaks or damp, as insulation alone will not resolve every moisture problem.
CorkSol SprayCork – Thin Internal Wall Insulation
For rooms where space is tight, CorkSol SprayCork provides a thin internal wall coating with minimal loss of room space.
- We apply three coats, approximately 6mm thick before the finishing plaster
- Can help improve wall surface temperatures and reduce the risk of surface condensation
- Fits around window reveals and curved walls
- Finished with a suitable plaster, ready for decoration
Where it makes sense: SprayCork suits rooms where keeping space matters. Where space allows, thicker insulation can provide greater thermal resistance. We assess your walls, moisture conditions and priorities before recommending the right approach.
Fuller Breathable Insulation
Where there is room for a thicker build-up, a breathable insulation system can provide greater resistance to heat loss through the walls.
- Options include wood fibre insulation with a suitable lime plaster finish
- Thickness and materials selected to suit the building
- Greater insulation potential, but more loss of room space
- May require changes to sockets, skirtings, radiators and window details
Where it makes sense: A fuller system is worth considering during a room renovation, when improving insulation is a priority and the extra depth is practical. We assess the wall condition, moisture risks and ventilation before recommending a suitable build-up.
Sisalwool Between Wall Timbers
Where existing wall timbers are suitable to retain, we can fit Sisalwool insulation between them before installing a new internal lining.
- An option when old lath and plaster has been stripped back
- Insulation fitted around the existing timber framework
- Airtightness and vapour control detailed to suit the wall construction and chosen finish
- Finished with a suitable breathable board and lime plaster, or plasterboard with a specified vapour-control layer, depending on the wall design
Where it makes sense: During a room renovation, when the wall is already opened up. We check the masonry, timber condition and moisture risks before recommending the insulation, vapour-control layer and finish.
