EWI for Existing Properties

For properties built with solid walls or for non traditionally built properties such as concrete Wimpey "No Fines", retaining heat can be extremely difficult as the thermal properties of the existing walls allow rapid transfer of heat from the inner face to the outer leaf. This can inflate energy bills and make budgeting through winter periods extremely difficult. Often the external walls of these properties can degrade quicker due to damp and moisture ingress leading to wider scale structural defects.

The easiest remedy to tackle both the poor thermal performance and increase the weather proofing is to wrap the building in an external wall insulation system which are available with a variety of insulation materials and finishes to compliment any suitable property. The most common and cost effective insulation material for most typical refurbishment projects is Expanded Polystyrene (EPS) coupled with a polymer enhanced dash or silicone finish. For high rise flats, premises with multiple occupation or timber frame properties, the insulation material most suitable would be mineral wool due to this material being non-combustible. Specialist finishes are also available including brick effect render, brick slips and feature details such as quoins and header courses.

Often overlooked additional benefits of EWI include increased acoustic insulation, reduction of future maintenance to external walls and aesthetic improvements giving the building a new lease of life. Due to the improved thermal performance, the building's Energy Performance Certificate (EPC) can increase dramatically, reducing the energy demand and reducing fuel bills. Furthermore, a property treated with EWI typically increases in value by up to 38% in some parts on England, based on a study conducted by DECC.

Improving properties with EWI also has wider community benefits such as increasing resident's pride in their area as well as their homes, which is why EWI plays a significant part in area regeneration schemes across the country. Evidence is gathering to show that refurbishment of existing housing stock in the UK can be far more cost effective than redevelopment as well as being quicker to tackle the growing housing crisis, bringing unused and unloved housing into the 21st Century.

Hamilton have 20 years of experience in refurbishment using EWI and can help from the initial design concept to the successful handover of a regenerated estate.