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External wall insulation boards

Apartment building facade before external wall insulation, exposed brickwork and concrete balconies visible

External wall insulation boards are the thermal core of any EWI system. This guide explains how they work, compares EPS, mineral wool, phenolic and PIR/PUR options, and shows how to choose the right external insulation boards for your wall type, finish and regulations.

External solid wall insulation

Row of detached brick houses in the UK ideal for external solid wall insulation to improve thermal efficiency and reduce heating costs

External solid wall insulation can dramatically improve comfort, reduce heat loss and transform the look of older UK homes. This guide explains how it works, what it costs and what to check before you insulate.

External Wall Insulation in London – 2025 Costs, Materials and Benefits

Worker installing graphite EPS insulation panels on exterior wall using fixings

What Is External Wall Insulation External Wall Insulation (EWI) is a system used to improve the thermal efficiency of buildings by adding insulation boards, mesh, primer, and render to the outer walls.In cities like London and Wembley, where many properties were built before modern insulation standards, EWI is one of the most effective ways to save energy […]

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

UK house during external wall insulation with EPS boards — window reveals visible

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 […]