Internal Wall Insulation Manchester

Internal wall insulation is the process of adding a layer of insulation to the inside face of your external walls. It is the most effective way to reduce heat loss in homes with solid walls — the type of wall found in most of Manchester's red-brick terraces and older semi-detached houses.

Internal wall insulation (IWI) is a layer of insulating material fixed to the internal surface of an external wall, usually finished with plasterboard. It works by trapping heat inside the room instead of letting it escape through the wall. For solid-wall homes — which have no cavity to fill — internal wall insulation is one of only two practical options, the other being external wall insulation.

35% Heat Loss Through Walls

Manchester has thousands of solid-wall homes built before the 1930s. These homes lose around 35% of their heat through the walls.

Works On Any Solid Wall

Unlike cavity wall insulation, which only works on homes built after the 1920s with a gap in the wall, internal wall insulation works on any solid wall.

Keeps The Street Scene

For Manchester's terraced streets, it is often the only option that preserves the external appearance of the property.

A free survey to assess your wall type, damp levels and room dimensions.

Fixing insulation boards (usually PIR or phenolic) to the internal wall face.

Sealing all joints and edges to prevent air leakage.

Plasterboarding and finishing to a smooth surface.

Re-fitting skirting boards, sockets and window reveals.

Lower Heating Bills

Reduce heat loss through walls by up to 45%.

Warmer Rooms

Walls feel warmer to the touch and rooms heat up faster.

Condensation Control

A properly installed system with vapour control reduces damp and mould.

No Planning Permission

Internal work rarely needs consent, unlike external insulation.

Preserves The Street Scene

The outside of your home looks unchanged.

A common concern is that internal wall insulation causes condensation. In fact, a correctly installed system with a vapour control layer prevents condensation by keeping warm, moist air away from the cold wall surface. The key is proper installation — which is why using an experienced local installer matters.

✔ Solid-wall terraced and semi-detached homes

✔ Homes where external wall insulation is not allowed (conservation areas, listed buildings)

✔ Properties where you want to keep the external appearance

✔ Rooms with damp issues that have been resolved first

Every installation starts with a free, no-obligation survey. We assess your walls, measure the rooms and give you a fixed quote. Book your free survey today and take the first step to a warmer, cheaper home.