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What Is Cavity Wall Insulation & How Can It Help?

One of the most cost effective ways to improve the energy efficiency of a property is by installing cavity wall insulation.

Cavity walls are likely to feature in most houses built after 1920, and if the house was built in the last 10 years then they are more than likely already insulated. But not all properties with cavity walls are suitable for this installation, for example those regularly exposed to wind driven rain.

How Cavity Wall Insulation Works?

Cavity wall insulation works by filling the gap between the two layers of the external wall, this is normally done with a foam spray. A registered installer will be required to do this and can check the propertys suitability for the installation beforehand.

If a property is suitable, the insulation is blown into the cavity through a drilled hole in the exterior brick wall. Each hole is around 22mm in size and are spaced at intervals of around 1m. Every part of the wall must be filled with insulation and the process can take around two hours depending on the size of the property. Installing cavity wall insulation should be simple, quick and make no mess.

Cavity Wall Insulation Benefits!

Installing cavity wall insulation can contributed to savings of up to 35% of all heat loss from your home. The insulation can be made from mineral wool, beads or granules, and foamed insulants. All three types are manufactured to British standards; however foam insulation must be certified by the British Board of Agrement.

Further information on cavity wall insulation can be found on theEnergy Saving Trustand Which?


Home Insulation and Energy Systems Contractors Scheme (HIES)

The Home Insulation and Energy Systems Contractors Scheme (HIES) has been launched to protect consumers when buying Solar PV, Solar Thermal, Cavity Wall Insulation, Loft Insulation and other energy efficient products.

All HIES members go through a comprehensive accreditation procedure, which includes: undergoing a five point credit and background check, supplying a minimum of 10 customer and 3 supplier names and addresses who can be independently approached for references, and providing proof that they carry employers and public liability insurance, amongst many other checks. Members also agree to be continually vetted to ensure consumers are satisfied throughout the buying, installation and after sales process and companies installing Feed In Tariff generated products (FITs) will also be MCS and REAL registered.

HIES puts the consumer first, and all homeowners using an accredited member of the Scheme will receive deposit and work in progress protection, insurance backed guarantees, and FREE access to professional mediators, independent inspectors and a legally binding dispute resolution service via The Ombudsman.

To protect consumers further, the HIES Compensation Fund will pay out all bona fide claims to compensate homeowners where installers fail to live up to their promises and The Ombudsman rules in their favour.

HIES is the only scheme to give consumers this advanced level of protection.