Natural Insulation Supplier

Steico & Diasen Wall Insulation

Structures

Restricted-Access Excavation

Excavation

Land rehabilitation and clearing

Mobile Timber Milling & Wood Salvage

Our main focus here in Western Asturias is the high-performance restoration of historic ruins. We work alongside clients who appreciate doing things properly and understand that real quality takes time.

Working in remote locations means we have to be self-reliant, which is why we keep so many trades in-house. It’s simply the best way to keep the job running smoothly and up to standard. We manage the groundwork, structural rebuilds, breathable insulation, lime plastering, plumbing, and electrical work ourselves. We also design and fit complete off-grid solar arrays and heavy-duty battery storage, pairing them with satellite internet so even the most isolated sites have reliable power and communications. If the project requires it, we’ll bring our mobile sawmill on-site for custom timber milling, and handle the surrounding land rehabilitation and tree felling.

While our hands-on building projects are based up north, our technical consulting and material supply services extend right across Spain. This is where we stand apart: our consulting is driven entirely by field experience, not theory. We only sell products that we actively use, install, and trust on our own job sites. Whether we are supplying natural, vapour-permeable insulation—such as Steico, Diasen, and hemp—or commercial-grade Victron off-grid power systems, you can be certain we know exactly how to work with them. Every sale and every piece of advice we provide is backed by years of direct installation experience, ensuring you get practical, proven solutions rather than just a sales pitch.

For our clients in Cádiz and across Andalucía, we work closely with BioReforma S.L. This partnership means projects in the south receive the same rigorous standard of natural insulation installation, run by a regional specialist whose experience we trust completely.

ECS Insulation Calculator — Spain CTE 2026
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

Ready to specify your materials?

ECS ships natural insulation nationwide from Barcelona and Asturias. Get a quote or ask a question.

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.

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