External Solid Wall Insulation – Types, Costs and Best Systems [2025 Guide]

What Is External Solid Wall Insulation External solid wall insulation (EWI) is a system applied to the outside of a solid wall to improve its thermal efficiency.Unlike cavity wall houses, solid wall properties have no air gap – meaning they lose up to 45% of heat through the external walls. Installing an EWI system adds […]

External wall insulation grants – Guide

Everything you need to know about funding for external wall insulation (EWI) in the UK: eligibility, ECO4, the Great British Insulation Scheme (GBIS), application steps, costs, savings and expert tips.

External wall insulation cost – Calculator

Clear, UK‑specific pricing with cost per m², full‑project examples by property type, savings and payback, plus a step‑by‑step budgeting checklist. Built to help you compare quotes like‑for‑like and avoid surprises.

External Wall Insulation Thickness Guide (UK): 50mm vs 80mm vs 100mm

External Wall Insulation thickness is one of the most common questions homeowners ask. Should you choose 50 mm, 80 mm, or 100 mm? The answer depends on your house type, energy goals and budget. In this guide we’ll explain the differences, show you how to measure, and give clear recommendations for UK homes. In a […]