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SPECIFYING THE RIGHT IWI SYSTEM FOR A PERIOD HOME - 20.12.11

After a lot of research into the best possible insulation solution for a low energy upgrade of a Georgian property, homeowner Paul King, Chief Executive of the UK Green Building Council, specified Knauf Insulation’s ThermoShell® Internal Wall Insulation (IWI) System, for high thermal performance. 

Many of the UK’s existing homes are inefficient when it comes to using heat energy, and it's estimated that these account for about 27 per cent of the UK’s carbon emissions. Paul King's 1790 period home falls into the category of 'hard to treat' solid masonry wall properties, and it is an area that urgently needs attention in terms of upgrading the building's thermal fabric.

Older houses are not as easily treated as modern cavity wall constructions, which can be tackled relatively simply, so a flexible, cost effective and highly efficient system of insulating walls was needed.  Paul was keen not to alter the façade of the building, as two sides are exposed brick and the other elevations have been rendered for a very long time.  He therefore looked to an internal system that could be used as part of a planned and phased approach - on a room-by-room basis.
 
Having viewed ThermoShell IWI system demonstrations and spoken to the technical advice team, Paul decided to opt for the flexible system, with it first being installed into the dining room area, as he was having a new window installed that was going to cause a certain amount of disruption and redecoration anyway.

IWI is often the preferred system for upgrading properties when altering the exterior of the building isn’t an option and they deliver high levels of thermal performance cost effectively.

The ThermoShell IWI system can upgrade a property to current Building Regulation thermal standards and beyond.  It consists of composite thermally engineered studs (EcoStuds) and insulation slabs (Earthwool® EcoBatt), which can be combined to provide greater thicknesses of thermal insulation than achievable by using a single thickness.

The system can accommodate wall imperfections, fixings for fittings such as radiators, and can be easily adapted around openings such as windows and doors. No scaffolding is required and the system can be installed as part of a whole house refurbishment plan. 

Additionally, the simplicity of the ThermoShell IWI system allows a competent tradesman to become an Approved Contractor and install the system using a traditional plaster skim finish or dry lining techniques.

Builder and landscaper, Andrew J. Horne in charge of the project, comments: "The team at Knauf Insulation helpfully came on to site to work with us to ensure we were fully conversant with the materials and system, meaning a swift and efficient installation process."

Paul King comments: "The whole installation process was really quite simple. With the Knauf Insulation 25 year guarantee, I have complete peace of mind with the system, and hope to roll it out around my house, room by room."


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