Is My Home Suitable For Cavity Wall Insulation?

Homes built from the 1920s onwards often have cavity walls and are generally suitable. However, suitability depends on several factors, including the width of the cavity, the condition of the external walls (e.g., no significant cracks or damp issues), and the presence of any existing partial insulation. A professional survey is always recommended to assess suitability.

Will Cavity Wall Insulation Stop Damp?

Cavity wall insulation is designed to prevent heat transfer, not to stop damp caused by structural issues. If your home has existing penetrating damp, failed pointing, or damaged rendering, these issues must be resolved before insulation is installed. In fact, installing insulation into a wall with pre-existing damp problems can exacerbate the issue.

Does Cavity Wall Insulation Affect My EPC Rating?

Yes, insulating your cavity walls is one of the most effective ways to improve your home's Energy Performance Certificate (EPC) rating. A better EPC rating reflects lower energy consumption and can increase your property's value.

What Are the Different Methods of Filling Cavity Walls?

Filling cavity walls involves inserting insulating material into the space between the outer and inner walls of a building. This can be done through various methods such as: Blown-in Insulation: Small holes are drilled into the exterior wall, and insulating material is blown into the cavity using specialised equipment.Foam Insulation: Expanding foam is injected into the wall cavity, which then hardens to form an effective insulating barrier.

How Does Cavity Wall Insulation Work?

It works by trapping air within the insulation material, which acts as a barrier to heat flow. Without insulation, air within the cavity can move freely, allowing heat to pass easily from the warmer side of the wall to the colder side through convection, conduction, and radiation. By filling this space, the insulation significantly slows down this heat transfer.

Cavity Insulation Batts & Boards

115mm Kingspan Kooltherm K106 Cavity Insulation Board 1200mm x 450mm (2.16m2/Pack)

Cavity Wall Insulation

115mm Kingspan Kooltherm K106 Cavity Insulation Board 1200mm x 450mm (2.16m2/Pack)

125mm Knauf DriTherm Cavity Wall Insulation Slab 32 (2.18m2/Pack)

140mm Celotex Thermaclass Cavity Wall 21 Full Fill Insulation Board T&G 1190mm x 450mm (2.14m2/Pack)

85mm Knauf DriTherm Cavity Wall Insulation Slab 37 (4.37m2/Pack)

75mm Knauf DriTherm Cavity Wall Insulation Slab 32 (3.28m2/Pack)

125mm Knauf DriTherm Cavity Wall Insulation Slab 37 (3.28m2/Pack)

65mm Knauf DriTherm Cavity Wall Insulation Slab 37 (5.46m2/Pack)

85mm Knauf DriTherm Cavity Wall Insulation Slab 32 (2.73m2/Pack)

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