Passive Raft Foundations for Passive Houses – Future Found


Future Found logo

 

Build Your Passive-House Right from the Ground Up with Future Found Insulated Raft Foundation

When you’re aiming for ultra-low energy bills, maximum comfort, and a truly airtight, thermally efficient home, getting the foundation right is non-negotiable. That’s where Future Found steps in. Engineered from the ground up with passive and low-energy houses in mind.

Future Found Cutaway

Why Future Found is Perfect for Passive House Projects

  • Exceptional thermal performance — thanks to our high-density EPS formwork, Future Found achieves ultra-low U-values and Psi values (as low as 0.08 W/m²K and 0.06 W/mK respectively), helping seal in heat and cut energy waste.

  • Elimination of cold bridging — the continuous insulation wrap means there’s no gap between floor and wall where heat can escape, supporting a clean thermal envelope from slab to roof.

  • Faster, cleaner build process — the system arrives pre-engineered; once on site you can pour concrete in a single operation and reach finished floor level quickly. Less onsite labour, less waste, and fewer logistical headaches.

  • Material & cost savings without compromising quality — requiring 30–40% less concrete than traditional foundations, and cutting labour and machinery needs by up to 50%, Future Found is as efficient in build cost and environmental impact as it is in thermal performance.

  • Built for modern construction methods — whether you’re using traditional brick/block, timber frame, SIPs, ICF, or modular systems, Future Found integrates seamlessly.

 

thermal bridge of a generic wall, showing there’s no gap between floor and wall where heat can escape

 

The Smart Base of a Sustainable, Comfortable Home

With Future Found, you’re not just laying a foundation, you’re investing in a base that preserves heat, reduces carbon emissions, and helps your build meet Passive House (or similar low-energy) standards. Because it eliminates cold bridging and delivers consistently high insulation, it becomes part of the continuous thermal shell that passive building performance depends on.

5 people installing a passive raft foundation

Our Insulated Raft Foundation System holds both NHBC Accepts and BBA certification, giving our clients and partners confidence that it meets the highest standards of performance, durability and compliance. 

These certifications aren’t just badges; they are evidence that Future Found has undergone rigorous, independent technical assessment and is trusted for use in homes backed by NHBC warranties, which cover up to 80% of the UK’s new builds.

In an industry that’s under pressure to build smarter and faster, validated systems like Future Found help developers reduce risk, speed up construction and adopt modern methods of construction with confidence. At Build-Lite, we are proud to be helping lead the way in delivering proven, future-ready solutions. 

NHBS Accepts & BBA Approved

If you’re serious about building a Passive House, or simply want a home that’s cheaper to run, warmer in winter, cooler in summer, and greener long-term, starting with a high-performance, insulated raft foundation is a no-brainer.

Ready to talk spec, soil conditions or pricing? Get in touch, and we’ll help tailor the system to your project’s needs.

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