Land rehabilitation and clearing

Highly insulated structures

NZEB building Energy and Heating Systems

Solid Wall Natural Insulation for Acoustic, Thermal, and Moisture Control

Steico Insulation

Hemp block and board Insulation

Consulting

managed rehabilitation

Kronoterm heat pumps

Authentic Wellness, Inspired by Nature: HUUM Sauna Systems

Electric heating foils for ceiling, wall and floor

Hydronic Radiant Floor Heating

Ventilation and heat recovery systems

Now permanently based in Western Asturias, ECS is a no-nonsense insulation, water, and energy consultancy. We don’t just advise—we restore historic stone architecture, build highly efficient Steico-based structures and transform overgrown land into self-sustaining, irrigation-free environments.

We avoid standard grid-tied setups, specialising in 100% off-grid solar and battery arrays engineered for absolute power independence. Using this existing infrastructure, we are actively developing a private Virtual Power Plant (VPP) network to turn surplus yield into a financial asset.

For building envelopes, we have no time for synthetic shortcuts. We use natural materials such as cork, hemp, wood fibre, clay, and lime to create breathable, damp-free, and fully energy-autonomous homes.

Beyond our bespoke Asturian projects, we supply premium natural building materials and off-grid hardware directly to constructors and self-builders across Spain. BioReforma SL has taken over the insulation projection team and restorations in Cadiz.

We only supply what we’ve personally tested and lived with, giving you the expert guidance required to escape the chaos of modern life and live in total comfort and autonomy.

Articles

ECS Land Rehabilitation

Just bought a property in Western Asturias? ECS provides professional land clearing, flail mowing, and excavation for historic properties to help you start your renovation.

Heating in Spain

Heating in Spain

Understanding Carbon Fleece Heating and Phase-Change Hot Water

Understanding Carbon Fleece Heating and Phase-Change Hot Water

The Ultimate Eco-Envelope: Sprayed Hemp, Cork Upgrades, and Clay Finishes

The Ultimate Eco-Envelope: Sprayed Hemp, Cork Upgrades, and Clay Finishes

The Breathable Building Revolution: Why Steico, Diathonite, and Hemp are Winning

The Breathable Building Revolution

The “Lazy Architect” Trap

The “Lazy Architect” Trap

Europe’s property market is like a landlord with a hangover

Europe’s property market is like a landlord with a hangover

From Charming Ruins to Energy Fails: Why Spain’s Old Houses Are Becoming Unsellable Bricks

From Charming Ruins to Energy Fails: Why Spain’s Old Houses Are Becoming Unsellable Bricks

Steico Insulation

Natural Insulation

Restoring an Asturian ruin

Asturian urban law, building amnesty Asturias, off-grid restoration Spain, rural grants Spain, PREE 5000 Asturias, traditional stone restoration.

Spain’s Migration Shift: Why Professionals Are Moving to Asturias

Spain’s south-to-north domestic migration shift. Learn why professionals are relocating to smaller Asturian concejos and rural villages.

EU Solar Inverter Ban: Will Your Energy Bills Increase?

Chinese solar inverters Europe, solar energy cybersecurity, will solar inverter ban increase energy bills, European solar manufacturers

What is a VPP? Virtual Power Plants & BESS Explained

BESS with a Virtual Power Plant (VPP) fixes broken solar dumping, unlocks peak trading arbitrage, and stabilises the modern grid.

Why Insulation Thickness Matters: Steico vs. XPS

Why insulation thickness and material quality matter. Read our direct comparison of Steico wood fibre versus XPS for breathable, high-performance building.

Starlink Price Hike Europe: Best Alternatives

Starlink Price Hike Europe: Best Mobile 4G/5G FWA Alternatives

Designing a solar pergola (canopy)

Designing a Solar Pergola: Size, Layout & Framing Tips

How to Legally Keep a Forest Natural in Spain (Without Fines)

How to Legally Keep a Forest Natural in Spain

The Versatile Charm of Wooden Ground Mount Solar Systems

Wooden ground mount solar systems. Learn how to turn your solar array into a seating area, jacuzzi roof, or woodpile rack.

Victron & Shelly Integration: Automate Your Solar Surplus (v3.70)

Victron & Shelly Integration: Automate Your Solar Surplus (v3.70)

From Damp Walls to Dry Homes: Unmasking the True Causes of Damp

From Damp Walls to Dry Homes: Unmasking the True Causes of Damp

Why is Spain Still Using Non-Breathable Insulation?

Why Spanish architects still favour synthetic foam over breathable insulation. Learn about damp, CTE regulations, and the shift to sustainable building in Spain.

Under the Skin: An Exclusive Look at Our Historic Retrofit

Under the Skin: An Exclusive Look at Our Historic Retrofit

The “Free” Insulation Trap: Why Modern Grants Can Ruin Historic Spanish Homes

The “Free” Insulation Trap

The “Lazy Architect” Trap

The “Lazy Architect” Trap

Spain’s Energy Crisis: Why Free Solar Can’t Fix High Bills

Spain Tax Deductions 2026: Claim Eco-Renovation Refunds

The Ultimate Eco-Envelope: Sprayed Hemp, Cork Upgrades, and Clay Finishes

The Ultimate Eco-Envelope: Sprayed Hemp, Cork Upgrades, and Clay Finishes

Radon Gas

Radon

The Real Cost of Restoring a Mountain Ruin

Buying a pile of stones? Don’t underestimate the budget. ECS breaks down the real costs of mountain ruin restoration, from structural shells at 800€/m² to full finishes.

The Spanish Solar Revolution: Finding the Perfect Kronoterm Heat Pump for Your Family

Discover how combining Solar PV with Kronoterm heat pumps can cut your Spanish home’s energy bills by 75%. Tailored aerothermia solutions for families of 2 to 6.

Cut Hot Water Costs by 75%: ECS Brings KRONOTERM Heat Pumps to Spain

Cut Hot Water Costs by 75%: ECS Brings KRONOTERM Heat Pumps to Spain

The New Reality: Energy Status = Rental License

The New Reality: Energy Status = Rental License

MFH systems: Advanced Heating, Cooling & Ventilation | ECS

Discover how MFH systems’ E-NERGY CARBON, AIRUNIT, and IDEAL solutions offer energy-efficient heating, cooling, and ventilation for any building project.

Restoration & NZEB Consultancy

Bridging heritage preservation with Net Zero strategies.

Natural Insulation

Independent supplier of natural, vapour-permeable insulation, including Steico, von Hanf, Rockwool, and Diasen.

Energy Systems

Solar power and battery storage solutions for both grid-tied and off-grid properties.

Water Heating

KRONOTERM Ultra-Efficient Hot Water Heat Pumps.

Climate Control

E-NERGY CARBON advanced, low-energy heating solutions for year-round comfort.

Managed Restorations

Full project delivery through our trusted partners.

Specialist Groundworks

Cellar excavation and land rehabilitation for restricted access sites.

Sauna & Spas

Design and installation of bespoke, energy-efficient saunas and spars.

Property Health Check

Comprehensive pre-purchase health checks for electrical & insulation systems.

ESaaS

Off-grid power systems for your property and trade the surplus back to the network

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.