This site provides actionable guides on achieving energy independence, using natural insulation to kill heat loss and drive down costs. With the upcoming 2030 EU energy regulations mandating the phase-out of ‘F’ and ‘G’ energy performance certificates (CEE), upgrading your home’s thermal envelope is no longer just about comfort—it is essential to keeping your property legal, rentable, and saleable. Our goal is to help you navigate these strict new standards and create a comfortable, low-maintenance, cost-effective home.
ECS is an energy and natural insulation consultancy. We help property owners radically improve their energy ratings the right way—without sealing moisture into historic Spanish masonry with synthetic foams. By designing breathable envelopes using Steico wood fibre, hemp, and Diasen cork renders, we help you hit top-tier CEE ratings while actively preventing damp and mould. Our advice comes from real-world experience, not sales pitches, and we only recommend and distribute systems we personally use.
To keep our skills sharp, we take on select restoration projects alongside developing our living showhouse and workshop in Western Asturias. Although the build is less than 50% complete, it already operates as a near-zero-energy building (NZEB) with zero utility bills—proving the building physics work long before the project is finished.
To ensure high-quality installation across the country, BioReforma S.L. carries out many of our projects in Andalucía, while trusted local partners do the same for us here in Asturias. This allows ECS to focus entirely on technical consulting, nationwide material distribution, and helping clients future-proof their homes for 2030 and beyond.
ECS · Eco Construction Spain
Natural Insulation Calculator
Find the right breathable insulation for your project — sized to Spain's 2026 CTE building standards.
Spain CTE 2026 Compliant
Where is your project?
We'll determine your CTE climate zone and required U-value targets automatically.
What are you insulating?
Select the wall or structure type. This determines which CTE U-value limit applies.
Choose your insulation
ECS stocks natural, vapour-permeable materials from Steico, von Hanf, Rockwool and Diasen.
Add a finish or substrate layer (optional)
A cork render, clay plaster or lime coat adds thermal mass and controls moisture. Recommended for historic buildings.
Your Insulation Performance
Wall Assembly
Climate Zone Detail
This tool is for estimation purposes only. Calculations are based on generic material properties and steady-state physics. It does not account for thermal bridges, mortar joints, or site-specific conditions. Compliance with the Spanish Technical Building Code (CTE) requires a certified project by a licensed Architect.