Modular Home FAQs

You are investing in the world's most rigorous building certification. Over 2,000 tracked parameters are taken into account by the Passive House Institute in Germany. In practice, this means: up to 20x lower energy bills (~15 vs ~350 kWh/m² per year), significantly longer lifespan, constant fresh air ventilation, and a home that feels like a thermos, warm in winter, cool in summer, silent inside.

Passivhaus certified timber-frame system, built on 35cm structure. Exceptional strength, ground-breaking efficiency.

High-performance STEICO wood-fiber insulation, λ ≈ 0.036 W/m·K.

Over 85% of new homes in Sweden are built on timber-frame, with an average lifespan of 70+ years. MODULAR uses a significantly improved timber-frame structure (Passivhaus certified), fully airtight and incredibly efficient, which can significantly extend its service life. The minimum estimate is 80+ years.

Both are possible. Over 80% of clients choose MODULAR as a permanent home. Sanctuary 142 m² Exterior Finished is the most popular model among families.

Nest 24 m² (6.3×3.8 m). Wanderlust 48 m² (12.6×3.8 m). Serenity 95 m² (12.6×7.6 m). Sanctuary 142 m² (12.6×11.4 m).

Guide: about €1,100/m² Exterior Finished to €2,500/m² for a fully finished model plus smart systems. Compare this against ongoing savings. EU average reference: ~€1,800-2,200/m² finished.

It quantifies the life-cycle impact. MODULAR is carbon-negative, at −101 kg CO2e per m².

On the BIOBUILDS website and the public pages of the issuing institutes. This includes Passivhaus certification and EPD International.

Yes. Ultra-low consumption enables compact PV and battery systems for autonomy.

It has a very high resistance 35cm prefabricated structure with ground-screw foundations to dissipate shocks and vibrations. It offers significant resilience to natural disasters.

Factory tests reach over 90 minutes on wall fire resistance. While it can vary by location, the natural resistance of the cladding and the wall's airtightness is undeniable.

A purpose-designed interface physically separates the foundation from the home and absorbs mechanical movement at every connection point. Ground screws concentrate the connection into a small number of points that are easier to insulate and control. A concrete foundation spreads the same thermal-bridge risk across an area tens or hundreds of times larger, which is why a Passivhaus concrete foundation must be fully insulated.

Beyond being fully airtight, the underside of the floor assembly includes a fine metallic protection mesh. The openings of the ventilated facade are also protected with a fine insect mesh.

Yes. We provide a general description of the complete building system. The patent-pending volumetric structure uses C24 timber, interior OSB made with formaldehyde-free adhesives, STEICO ultra-efficient wood-fibre insulation, a diffusion-open exterior board and an intelligent vapour-control membrane. The defining engineering advantage is three-dimensional. A conventional sandwich panel is calculated as a stack of separate layers. BIOBUILDS calculates the walls, floor and roof together as one volumetric structural and thermal system, eliminating active thermal bridges across the complete home.

Timber frame. The most advanced building material available, timber insulates naturally, is exceptionally strong, stores CO2 instead of emitting it, and creates naturally healthy indoor conditions.

Over 98% organic materials. Your home breathes naturally, regulating humidity, purifying indoor air, and creating a living environment that conventional buildings simply cannot match.

Approximate airborne sound insulation of 54 dB. This is comparable to professional audio spaces.

Controlled outward drying via a smart membrane and carefully selected structural panels. The risk of condensation and mold is eliminated.

Yakisugi or Lunawood. Both offer high protection and durability.

A full catalog of premium organic finishes is available during the design phase. These are included at no extra cost for the turnkey option, unless specified otherwise.

A controlled air cavity that evacuates moisture and protects the structure long-term. Also known as rainscreen cladding.

All installations included. For modules with a kitchen, rough-ins are pre-installed and ready for cabinets and appliances.

Organic finish. Low maintenance. A typical recoat is needed every 3-6 years, versus 1-2 years for conventional synthetic finishes.

Materials are selected for easy cleaning and durable, modern natural aesthetics.

The turnkey package includes exterior textile blinds with multi-protocol smart control. They block up to 99% of UV radiation and provide wind resistance up to Class 1.

A low slope of 3–5°. This provides a flat look with efficient drainage.

Yes. Ventilation reduces moisture and overheating and extends the life of the roof covering.

EPDM membrane. Load capacity over 300 kg/m².

Yes. The low-slope roof supports loads of up to 300 kg/m², almost four times the approximately 80 kg/m² capacity of a standard residential roof. Structurally, it is ready for your photovoltaic installation.

Concealed gutters are located within the ventilated facade. Optional collection for reuse is available.

Engineered beyond national standards for extreme loads, ensuring high safety in use. Est. at 300kg/m² for the roof load versus EU average of 80kg/m².

A tank above 200 L is generally unnecessary for a family household. Typical European sizing is approximately 100 to 150 L. BIOBUILDS uses a 100-150 L Ariston smart two-tank system. While one tank supplies hot water, the other recharges.

A greywater tank should be installed outside. This preserves valuable space inside the home and removes an unnecessary structural load and water-damage risk.

We recommend installing inverters and batteries outside. This keeps equipment noise and heat out of the home while simplifying servicing and connection to the external meter and main electrical supply.

Yes, depending on the final equipment and control configuration. Most add-ons communicate through standard protocols and can be connected through a compatible relay or a platform such as Home Assistant. Some systems currently require Wi-Fi for smart integration, including the Zehnder ventilation system. We confirm every interface when the final equipment specification is established.

Yes. In the Zehnder ComfoClime configuration, the system provides active heating or cooling while regulating indoor humidity.

The system combines centralised Zehnder ventilation and its heat-pump module with a decentralised Samsung/Panasonic heat pump for rapid temperature control. The exact models depend on the selected configuration.

It repeatedly beats the Passivhaus standard of ~15 kWh/m² per year according to Passivhaus simulations. That is roughly 20 times more efficient than the average European home, and far beyond the nZEB (nearly zero-energy building) standard. Performance varies by climate, orientation, and use.

Completed BIOBUILDS homes achieve a benchmark-setting ~0.4 ACH on average. The Passivhaus standard requires no more than 0.6 ACH. Older, leaky homes can reach ~20 ACH.

According to Passivhaus simulations: Modular reaches a ground-breaking 15 kWh/m² per year. In comparison, the EU detached house average is ~350* kWh/m² per year. This ensures a dramatically lower energy consumption. Values vary with location and positioning.

Up to 95% savings. This depends on consumption, climate, and orientation.

Super-insulation, smart shading, and heat-recovery ventilation maintain stable indoor comfort even during extreme heatwaves, without air conditioning. Needs vary by climate.

Super-insulation and smart heat-recovery ventilation maintain stable indoor comfort even during harsh winters, with minimal energy input. The home stays warm with a fraction of the heating a conventional house needs. Needs vary by climate.

It cuts infiltration. Typical houses can reach losses up to ~20 ACH (air changes per hour) under a standard airtightness test. MODULAR repeatedly reaches below 0.6 ACH. A 33x difference!

Triple glazed, laminated, tempered glass. Ground-breaking Ug of ≤ 0.5 W/m²K. And Passivhaus-certified ultra-efficient aluminum frames.

Through a volumetrically designed ultra-efficient system: MODULAR, also certified by the Passivhaus institute.

The Passivhaus certification covers the complete BIOBUILDS building system, not an individual material or wall layer. More than 2,000 parameters are verified across the materials, structure, insulation, airtightness and building services specified for the home. Every part is engineered and verified as one system before the home leaves the factory. A separate certification of the completed building adds the final project-specific layer. It evaluates how the certified BIOBUILDS system works with the exact climate, orientation, shading and foundation of the site. BIOBUILDS supplies the technical system data, while the certifier confirms the performance of the finished home in its specific setting.

Yes. The client may appoint an independent inspector or certifier to review the project and supervise the relevant stages.

Yes. We provide the technical data relevant to the Passivhaus-certified BIOBUILDS system.

Yes. Airtightness is checked during factory production at defined stages. A blower-door test of the complete home can also be arranged after installation, with the client or independent inspector present. The additional cost depends on the project location and logistics.

As with any building in Germany, the requirements depend on the site. A site-specific structural calculation and review by a certified body are generally required.

Carbon-negative. −101 kg CO2e per m².

The full life cycle. It is an international standard with full transparency.

Almost the entirety of MODULAR's organic structure is sourced from Europe, specifically Germany, Austria and Romania.

With over 98% organic content, a large share is recyclable or reusable.

Such programs are under evaluation as part of our circularity strategy.

Near zero. 99% is factory-prefabricated for a clean site and reduced impact.

Materials are selected for minimal VOCs. Interior smooth ECO OSB with near-zero formaldehyde is used for clean indoor air.

High airtightness with controlled outward diffusion, engineered to Passivhaus standards. Unlike conventional homes where condensation and mold are common problems, MODULAR's sealed envelope and continuous ventilation make these issues structurally impossible.

Zehnder ventilation system filtration. It captures dust, pollen, and allergens. A full air refresh occurs roughly every 2 hours.

Organic materials buffer humidity and support daily breathing comfort.

MODULAR is tested to meet both all discussed local standards as well as the incredibly strict Passivhaus System certification metrics.

Average production times: Nest: 2 days. Wanderlust: 3 days. Serenity: 5 days. Sanctuary: 7 days.

Through LEAN processes, Passivhaus standards, and EU regulations. 99% of the work happens in the factory under controlled conditions.

Yes. The most useful reference is one that resembles your own project. We identify the closest relevant completed home, confirm availability with its owner and coordinate a private visit. You can also visit the BIOBUILDS factory to inspect the materials, building system and production process before a home leaves the factory.

Reservation: 10%. Order: 40%. Production: 40%. Delivery: 10%.

In specific areas across Europe, we collaborate with local architects to simplify the process. If the area isn't covered by our collaborators, we can collaborate with the local architect directly for most projects.

The client handles foundation preparation and utilities with licensed contractors. The home is compatible with ground screws, concrete slabs, and other standard foundation types, as long as they do not compromise the efficiency of the home.

Logistics planning is included. Site access requirements are verified during the project planning phase.

Usually a few days from factory dispatch to your site. The exact time depends on location and site conditions.

The Exterior Finished option requires interior finishing. The turnkey option is move-in ready for your furniture.

The configurator is designed for personalization while maintaining system performance.

Yes, with added production-adjustment costs. Changes may slightly affect efficiency.

Yes. The system supports planned future extensions.

Yes. Both decks and pergolas are easy to install and can be implemented independently.

Preconfigured lighting, blinds, and other smart systems are available. They are expandable on request.

Changes are billed against agreed drawings. We use a transparent change control process.

Turnkey includes: the complete house, smart systems, ventilation, blinds, finishes, and MEP. What is not included: foundation preparation, utility hookups, and transport logistics. Estimated at 4-8% of the price, depending on location. Get in touch with our team for an auxiliary cost breakdown.

Financing, bank transfer, cash, company payment, crypto. Solutions are tailored to your context.

24 months for consumer purchases and 12 months for commercial, per EU standard. On top of that, we provide a 5-year structural warranty. All component manufacturer warranties apply in addition.