Land rehabilitation and clearing

Highly insulated structures

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

Steico Insulation

Hemp block and board Insulation

Consulting

managed rehabilitation

NZEB building Energy and Heating Systems

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

Built on a background of hands-on lime and clay plastering, ECS began a decade ago, focusing on the natural treatment of damp, lime and clay plastering, and spraying cork insulation in southern Spain. Today, BioReforma has taken over the southern operation, and the Asturian team focuses on restricted-access historic restorations, as well as nationwide distribution of natural insulation, low-energy heating, hot water, and solar systems. We try to bridge the gap between historic building restoration and modern NZEB standards, providing the advice and the materials you need to build a healthy, energy-independent structure.

Our whole-house approach begins with a breathable “eco-envelope” made from natural materials such as Diasen solid wall renders, Steico wood fibre, carbon-negative hemp, and clay or lime plasters. 

Whether you are restoring a traditional Spanish ruin or building a state-of-the-art new home complete with luxury spa hardware, we ensure your project is flawlessly executed, remains damp-free, is highly efficient, and, if needed, is fully self-sufficient.

Our approach is simple: straight talking, stress-free, and absolutely zero bullshit, using tried-and-tested solutions with over 30 years of experience in very high-end heritage restoration.

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

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.

Beyond Drywall: The Future of Healthy European Homes

Descubre por qué las placas de cáñamo están sustituyendo al yeso tradicional en Europa. Mejora el confort térmico, elimina el moho de forma natural y crea un hogar sano.

Spray Foam & Combustible Insulation in Spain: 2026 Insurance

Is spray foam a risk for home insurance in Spain? Learn about the 2024 Valencia fire impact, pan-European insurer trends, and how to protect your payout in 2026.

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.

The Real Cost of Building Walls in Europe: From Bare Minimums to Premium Upgrades

Compare the real cost per sqm to build and insulate house walls in Europe. We break down timber frames, solid stone retrofits, EWI, and premium hemp blocks.

How to build a Steico & Huum sauna

Master the art of the “breathable” sauna. Learn how to integrate Steico Flex and Duo Dry panels with HUUM heaters for a high-thermal-mass, eco-friendly sauna build.

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

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

Spain Tax Deductions 2026: Claim Eco-Renovation Refunds

Mould in Spanish Homes: Saving Lime & Clay Walls in Winter

Southern Spain’s 2026 winter has been historic. Learn how to stop mould and rising damp in traditional lime and clay homes using the 55/15 rule and desiccant dehumidifiers.

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

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

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

The “Lazy Architect” Trap

The “Lazy Architect” Trap

Mould in Spanish Homes: Saving Lime & Clay Walls in Winter

Southern Spain’s 2026 winter has been historic. Learn how to stop mould and rising damp in traditional lime and clay homes using the 55/15 rule and desiccant dehumidifiers.

Beyond Drywall: The Future of Healthy European Homes

Descubre por qué las placas de cáñamo están sustituyendo al yeso tradicional en Europa. Mejora el confort térmico, elimina el moho de forma natural y crea un hogar sano.

Wall Therapy: Diathonite and Wood Fibre Make Old Masonry…

Wall Therapy: Diathonite and Wood Fibre Make Old Masonry..

The New Reality: Energy Status = Rental License

The New Reality: Energy Status = Rental License

The Hidden Battery in Your Walls and Floors: Thermal Mass and the Renewable Grid

Insulation Regulations Delay Property Sales and Drive High Demand for Installers

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.

Diasen: Natural Plasters Explained

Discover the beauty and benefits of Diasen natural plasters in this comprehensive guide.

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

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

Step-by-step guide: How to make a Diathonite kitchen countertop

Learn how to create a stunning concrete kitchen countertop with this comprehensive step-by-step guide.

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 & Spars

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

Property Health Check

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

KNX & Building Automation

Optimise your building's efficiency with automated solar integration for heating, hot water, and wellness systems.

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.