Cavity Wall Insulation

EduFoam rigid polyurethane insulation, injected into cavity walls, provides one of the most efficient thermally insulated cavity wall systems available today. EduFoam can be used in just about any cavity wall system, even in hard-to-treat properties with a narrow cavity, to provide excellent thermal insulation as well as sealing against unwanted air-leakage. With a wide variety of grants available for cavity wall insulation – usually for glass fibre or other types of insulation, polyurethane foam is one of the most expensive cavity wall insulations you can invest in. However, due to the unique properties and installation technique of the foams, you will achieve a fantastic return-on-investment through numerous benefits, including:

Long-term savings – Injected EduFoam insulation provides one of the highest thermal insulation values available today, coupled with the fact that foam insulation loses little to none of its properties over time – even in the presence of water – your home will be insulated to a high standard for a minimum of 25 years.

Wall stabilisation – EduFoam Closed-cell polyurethane, when injected into a cavity wall, has sufficient compressive, tensile and shear strengths to restore the structural stability of existing cavity walls, even where wall ties have corroded or failed.

Resistant to flooding – EduFoam Closed-cell foam is extremely resistant to the passage of water, even under pressure, and in some cases has been recommended for use in flood zones to provide a barrier to temporary flooding.

Minimises noise – Both EduFoam closed and EduFoam open-cell foam insulation systems deliver an excellent air-barrier, minimising unwanted air-leakage and reducing the passage of airborne noise through the wall.

 Cavity wall insulation and stabilisationEduFoam insulation being injected into a cavity wall

EduFoam polyurethane cavity wall systems are designed to conform with, and are installed by trained and experienced contractors working to, the specification set out in BS 7457: 1994 (Polyurethane foam systems suitable for stabilization and thermal insulation of cavity walls with masonry or concrete inner and outer leaves). EduFoam is injected as a liquid through properly spaced holes drilled in the outer leaf, once injected the EduFoam system expands in the cavity and sets to form a rigid polyurethane foam which bonds the inner and outer leaves together. As the strength of EduFoam cavity systems is significant, the system has been widely used for the restoration of the integrity of cavity walls where the wall ties have become ineffective due to corrosion. Added to the structural stability of the foam is excellent thermal insulation, the insulation values achieved by EduFoam cavity systems, even in narrow-width cavities, can often meet and exceed current Building Regulations.

Brief guide to insulation values achieved

Type of Insulation Material Thermal Conductivity (W/m.K) Approx. U-value Achieved with 50mm depth of material (W/m2 0C)
Mineral Wool 0.040 0.8
Polystyrene Beads 0.037 0.74
Urea Formaldehyde 0.040 0.8
EduFoam Closed Cell 0.022 0.44

For more information on EduFoam cavity wall insulation systems, please take a look through the relevant sections below or give us a call on 0161 876 8040.


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