The technology
The panel is not "a straw wall." It is a load-bearing timber frame packed with mechanically compressed straw, closed and finished with the system that suits your site, your climate, and your taste.
The panel & its finishes
Mechanically compressed straw at roughly [your density] kg/m³ inside a load-bearing double timber frame — uniform density, no thermal bridges. Panels made to order, typically 300–400 mm thick, in millimetre increments.
How it's built
A hydraulic press packs straw into the timber frame at uniform density — the step that gives the wall its strength, its insulation, and its fire behaviour.
Panels are made to measure — including openings, angles, and non-standard shapes — under dry, controlled factory conditions. Quality is built in, not weathered out.
Numbered panels are craned into place and screwed together. A small crew can make a home weathertight in a matter of days — no wet trades, in almost any season.
Membrane, wood-fibre, render, and cladding go on to the exterior; clay or gypsum plaster inside. The four control layers — rain, air, vapour, thermal — are all handled.
Rooftop photovoltaics, a LiFePO₄ battery, and an off-grid inverter turn the house into its own power station — generating more than it uses and riding through blackouts.
A home that's warm, quiet, healthy — and that ends the year having produced more energy than it used.
Thermal coefficient
Compressed straw board has a thermal conductivity (λ) of roughly 0.039–0.056 W/mK. Built into a ~400 mm wall, that yields a U-value around 0.11–0.19 W/m²K — comfortably past passive-house territory (industry-general ranges). Our verified figures: λ [your λ] W/mK, U-value [your U-value] W/m²K.
The ">100% passive" proof
Photovoltaics of 5–15 kWp generate roughly 20–60 kWh on a good day; a 10.24–30.72 kWh LiFePO₄ battery carries the home through the night; an off-grid inverter keeps you fully powered through any blackout. Sized so a super-insulated straw home makes more energy than it uses — genuine independence, not just a smaller bill.
The energy system
High-efficiency 630 W panels — 8, 16 or 24 of them, sized to your home — generating around 20–60 kWh on a good day. 12-year panel warranty.
51.2 V lithium storage in 10.24 kWh modules — one, two or three — so the house runs on its own sun after dark. 5-year warranty.
One off-grid inverter per battery module keeps the home fully powered — and running right through a blackout. 5-year warranty.
Engineered, not improvised
A straw-panel home is a fully engineered structure, not a craft experiment. Every panel is calculated — its width sized to its structural bay for maximum resistance, its joints landing on the frame grid, its corners and openings reinforced — and the shell is designed to the full Eurocode suite together with national energy and seismic codes.
The Eurocode framework every other check is built on — safety factors, load combinations, design life.
Roof and wall actions calculated for your site's climate zone, so the structure is sized to where it actually stands.
The load-bearing timber frame inside each panel engineered to Eurocode 5 — graded, calibrated, and connection-checked.
The foundation designed to the ground it sits on — the light straw shell needs less below grade than heavy masonry.
A full seismic calculation to Eurocode 8 and the national anti-seismic code — the light, plaster-skinned shell absorbs and spreads earthquake forces.
The thermal performance of the straw exterior walls verified against the national energy-efficiency regulation.
Structural timber is grade C24 at ≤ 18 % moisture, treated against insects, termites and fungi to European standards. Panels are fabricated to strict tolerances — joints ≤ 3 mm, squareness ≤ 13 mm — and each is numbered for a fast, exact assembly on site.
The remarkable qualities
Plaster skins over a compressed straw core act like a structural insulated panel — a wide footprint that spreads load and absorbs seismic energy. The method has rebuilt homes in high-seismic regions quickly and affordably.
Straw this dense starves a fire of oxygen; rendered assemblies are certified for 120+ minutes (industry benchmark). Our certified rating: [your rating].
Vapour-open walls regulate humidity naturally, with no off-gassing — a home that breathes and stays comfortable.
High mass and density deliver strong acoustic insulation — an industry range of 40–65 dB of sound reduction.
Straw is a renewable agricultural by-product; each m² of panel stores roughly 115 kg of CO₂ instead of emitting it.
Factory-prefabricated for speed and quality, with a moisture-managed, breathable build-up designed to last for generations.
The honest questions
Counter-intuitively, no. Compressed straw is too dense to hold the oxygen a fire needs, and rendered walls are certified for two hours of resistance.
The straw is highly compressed and fully enclosed behind sheathing, membrane, and render — there's no loose straw and no void for anything to live in.
Managed by design: a vapour-open, "breathable" build-up with membranes and render keeps the core dry across the seasons.
Its SIP-like structure spreads load over a wide footprint and absorbs seismic forces — the reason it's trusted for reconstruction in seismic regions.