External Wall Insulation in Lewes, East Sussex

Most homeowners we chat with in the Lewes area are shocked to learn that up to 45% of their home's heat is lost through uninsulated solid walls. Unlike cavity walls, these older structures don't have a gap to trap air, meaning the cold transfers straight through to your wallpaper. By applying a layer of EPS or mineral wool insulation to the outside of your property, we drastically lower your home's U-value (that's just a fancy trade term for heat loss). Not only does this make your rooms feel much cosier, but it also improves your EPC rating, which is a massive plus if you ever decide to sell. Why keep paying for energy that's just leaking away?

One of the best things about EWI is that we do all the heavy lifting on the outside. You won't have to worry about moving furniture, taking down curtains, or dealing with plaster dust in your carpets. Our team works efficiently to fix the insulation boards to your external substrate using specialist mechanical fixings before applying a durable, weatherproof render. It’s a non-invasive way to completely renovate your home’s thermal performance. Whether you're near the blustery heights of the South Downs or down in the town centre, our systems are designed to stand up to the specific coastal weather we get here in Sussex.

We aren't just 'having a go' at rendering; we are officially approved contractors for PRB Systems. This means we’ve been trained to install their high-performance renders to the highest industry standards. When we work on your home, we use advanced through-colour silicone renders that are flexible enough to resist cracking and, better yet, never need painting. Imagine never having to get the ladders out to refresh your masonry again. We also carry £1 million in Public Liability Insurance, so you can have total peace of mind while we're transforming your property.

Living in Lewes means dealing with a fair bit of wind-driven rain, which can often lead to penetrating damp if your brickwork or old render has seen better days. EWI provides an extra layer of protection that stops moisture from soaking into your walls in the first place. By eliminating 'thermal bridging'—those cold spots where condensation loves to form—we also help prevent that nasty black mould from appearing in the corners of your rooms. It’s not just about warmth; it’s about making your home a healthier place to live for the long term.