Residential properties account for around a third of all UK carbon emissions. Targets set by central Government mean that Local Authority’s and Social Housing Providers have a duty to reduce carbon emissions and help eradicate fuel poverty for their tenants on the properties they are responsible for.
This Government obligation to reduce carbon emissions has created the need to look at improving the energy efficiency of our homes; our houses loose about 45% of their heat through the walls.
The most effective way of doing this is to look at our older properties as these are usually very high in energy consumption, resulting in high carbon emissions.
One way of reducing carbon emissions has been to implement energy efficiency measures onto residential properties through various grants or government schemes.
From these energy efficiency measures a popular choice has been to install external wall insulation (EWI) or solid wall insulation (SWI) as it is also known to the exterior of the property. EWI has become the most effective, long term solution to improving the thermal performance of buildings.
With millions of properties in the UK classed as “hard-to-treat”, either because of solid wall or non-traditional cavity wall construction, External Wall Insulation systems are the most viable option for Local Authority’s and Social Housing Associations to bring homes into line to cut carbon emissions.
Improving the energy efficiency of the existing building stock is one of the biggest challenges facing the UK and as properties vary greatly in size and shape a one size fits all does not always fit the bill when it comes to external wall insulation.
Buildings have changed and evolved over centuries. There are a number of areas on buildings that require careful consideration. Particular attention needs to be paid to the eaves, verges and reveals.
Poor detailing at these areas can dramatically reduce the performance of the EWI system and also leave the building open to water ingress which will result in considerable maintenance problems at a later date.
Current industry approaches and methods can be costly (extending roofs) and also contribute to heat loss (cold bridging) and water ingress issues (poor details).
A particular house type that is hard to treat with external wall insulation is Edwardian/Victorian terrace properties to which there is estimated to be approx. 5 million.
EWi PRO has developed an eaves and verge system that addresses all common EWI problems including water ingress, thermal performance, roof ventilation, enhancing visual appearance and increasing the longevity of the EWI system.