The leading wall exterior insulation cladding system (EWI) is called Kingspan Kooltherm K5. It has a fibre-free rigid thermoset phenolic core and is an extremely low-density foam. It has a number of added benefits including outstanding long-term performance, excellent sound-proofing qualities, exceptional compressive strength, incredibly water-repellent and breathable, highly sustainable, environmentally friendly, and of course superior thermal retention (stopping heat loss through walls).

External insulation systems come in a variety of forms and names across the globe but they all have one thing in common – they are designed to improve the energy efficiency of buildings. Whether you have cavity walls or not, a solid wall property or a listed building, there’s an EWI solution to suit your needs.

The Ins and Outs of External Wall Insulation: What UK Homeowners Need to Know

EWI systems consist of an insulation layer fixed either adhesively or mechanically to the exterior surface of the building and then coated with a weatherproof render in a wide range of colours and textures that gives you the freedom to create your own aesthetics. They eliminate the thermal bridges caused by structural elements and reduce air, wind and moisture penetration – and they’re also highly effective in reducing noise from the outside world.

EWI can be a great choice for renovation projects and is often a much quicker option than replacing existing windows. It also saves you money on your energy bills and enables you to qualify for SEAI grants on new build or retrofitted properties. If you are looking to insulate your property, we recommend talking to our team of experts who can suggest the best solution for you and provide a full specification to NBS standards.