Building Passive Houses from Straw and Hemp in 3 Months

Save 80% on heating costs with our energy-efficient eco-homes

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Our Advantages

We design and build eco-homes following the principles of solar architecture and passive house standards. Every detail is crafted to create harmony between nature, comfort, and your well-being.

Highest Ecological Standard

Natural materials that care for your health and the environment

Passive House

80% savings on heating costs through superior insulation

Fast Construction

Complete modular homes ready in just 3 months

Clean Building Site

Minimal waste and disruption during construction

Why Natural Materials Matter

We are not robots, but people who appreciate the quality of living in bio-positive housing. Every detail has its resonance, and nature creates peace and comfort by its very design. We use natural clothing because it breathes and lives with us. Similarly, we deserve to live in quality homes that care for our health and convenience.

Straw and hemp are materials that always care for our comfort and well-being. They maintain a natural microclimate and promote the health of residents. Modern technologies make it possible to create the warmest passive houses using natural materials that nature gives us for our comfort and prosperity.

This is not just construction — it's a return to European values that respect life, nature, and the future. Eco is the path to harmony with the environment, prosperity, and genuine life comfort.

Anti-allergenic with no harmful effects. Fire-resistant and safe. No heavy foundation required. Created for your restoration and well-being.

Manufacturing Process

All panels are manufactured according to the project drawings. The production process begins with the procurement of high-quality raw materials: timber and baled straw.

For the production of the panels:

  • Timber of the 1st grade, coniferous species, is used. The wood undergoes BIO fire protection treatment.
  • Straw is checked for moisture content and the absence of mold and field plant impurities.

The straw pressing process is carried out with a pressure of 12 tons. The use of internal jumpers (spacers/diaphragms) allows for the achievement of uniform pressing and precise panel geometry.

The panels are covered on the top and bottom with moisture-resistant plywood caps (covers). The panels are assembled using structural screws, which makes them highly durable and reliable elements of the future house.






Why Straw Panels are Technologically Relevant and Beneficial


Straw panels are highly relevant today due to their superior sustainability profile compared to conventional building materials.

Technologically, these panels offer exceptional thermal performance, significantly reducing heating and cooling demands in modern buildings.

Their dense, compressed straw core provides excellent acoustic insulation, creating quiet and comfortable interior environments for occupants.

As a natural and breathable material, straw helps regulate indoor humidity, which contributes to healthier air quality and reduces allergy risks.


The use of agricultural waste, like straw, diverts material from landfills and reduces the construction industry's carbon footprint.

Modern manufacturing techniques ensure precise geometry and high structural stability, making them fast and reliable to install on-site.

Despite being a natural fiber, compressed straw panels offer excellent fire resistance, often outperforming standard wood-frame construction when properly plastered.

The lightweight yet robust nature of the prefabricated panels speeds up the construction timeline, lowering overall labor costs for builders.

Economically, straw is a locally sourced, inexpensive, and rapidly renewable resource, contributing to greater cost stability in construction.

By choosing straw panel construction, individuals invest in a durable, long-lasting home that promotes energy independence and ecological responsibility.

Thermal Properties

Straw panels offer exceptional thermal properties, which are a key advantage ensuring high energy efficiency for buildings.



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Construction Process

Our construction process is meticulously planned and executed, ensuring quality, efficiency, and adherence to timelines. We leverage advanced techniques and a skilled workforce to transform blueprints into robust structures, focusing on sustainable practices and safety at every stage. From foundation laying to finishing touches, every step is carefully managed to deliver exceptional results.


Wall structures

  1. Lime - sand plaster 10 mm on 10x10 mm glass mesh
  1. Lime finishing 2 mm
  1. Potassium varnish
  1. VestaEco LDF UNI / THERM, 800x1200 mm
  1. Straw panel 400 mm
  1. Timber frame structure
  1. VestaEco LDF 15 mm
  1. Clay plaster reinforced with hamp
  1. Carpentry screws with washers or staples
  1. VestaEco LDF 15 mm

Interior Layers (Inside the Room)

Layer description:

  1. VestaEco LDF 15 mm on substructure every 30 cm
  1. VestaEco V vapor barrier
  1. Rafters
  1. VestaEco FLEX / FIBRA 300 mm
  1. VestaEco LDF UNI / THERM, 600x2400 mm
  1. Wkrętmet WKCP 8,0 x 180 carpentry screws every 60 cm
  1. Counter battens 80 x 40 mm
  1. Battens
  1. Roof membrane Eurovent SUPER 170 g/m2
  1. Roofing

Design Process: From Concept to Reality

Energy-efficient eco-homes are designed according to the principles of solar architecture. During design, we consider climatic conditions, site topography, sun movement and daylight duration, window size and placement. Designing according to these principles allows us to create buildings that efficiently use solar energy, reduce heating and air conditioning costs, and fill interior spaces with natural light.

01

Geodetic and Geological Surveys

Essential site analysis before beginning any design work

02

Sketch Project

Contains documents for building permits, showing house form, exterior appearance, site placement, with all rooms, their areas and elevation marks. Cost from 25€ per m²

03

Working Project

Contains detailed drawings for construction work by stages: foundation and utilities, house frame construction, exterior finishing, interior engineering. Cost from 18€ per m²

Completed Projects

Each project showcases our commitment to creating bio-positive living spaces where every detail resonates with nature's design. These homes demonstrate how modern passive house technology combines with traditional natural materials to create comfortable, healthy, and energy-efficient living environments.

Why Eco-Technologies Are Essential

Ecological technologies in construction are needed because they promote healthy living, environmental preservation, and economic resource conservation. These are not just trendy concepts but real investments in quality of life, nature conservation, and sustainable development for future generations. They provide savings, comfort, and safety that cannot be achieved with traditional materials and methods.

Ecological Impact

Use of natural and recycled materials minimizes construction's impact on nature, reduces harmful emissions, and helps combat climate change

Energy Efficiency

Eco-homes with innovative insulation materials significantly reduce energy consumption for heating and cooling, saving costs and reducing CO2 emissions

Healthy Microclimate

Natural materials like straw panels breathe, regulate humidity, and don't emit toxins, creating a comfortable and safe environment for residents

Durability and Strength

Eco-technologies are often based on proven natural solutions that are long-lasting and easily renewable

Additional Benefits of Natural Building

Waste Reduction

Use of ecological materials and construction technologies minimizes waste and enables resource reuse

Positive Health Impact

Absence of harmful chemicals in materials reduces the risk of allergies, asthma, and other diseases

Local Economy Support

Eco-construction encourages use of local materials and engagement of local producers

"We make our life's mission creating the best. This is not just construction — it's a return to European values that respect life, nature, and the future."

Natural Materials in Construction


Almost any construction project can be successfully realized using natural and renewable materials.

Modern sustainable architecture heavily relies on materials like timber, hemp, straw, and clay for structural integrity and finishes.

These natural resources offer significant environmental benefits, including low embodied energy and carbon sequestration.

Utilizing natural materials often results in healthier indoor environments due to better air quality and moisture regulation.

Therefore, building with natural materials is a viable and increasingly preferred choice for future-proof, eco-friendly structures.

Our Services and Pricing

vandelmar.hpmcompany.eu

Van Delmar Belgium – Your Partner in Sustainable Construction

Dear Architects, Van Delmar is a Brussels-based contractor specialising in energy-efficient building solutions using straw panels and hempcrete blocks. Since 2008, we have delivered high-performance ecological projects across Belgium, collaborating closely with architects who demand precision in mod

We in Belgium

Natural Materials We Use

HempCrete

A revolutionary bio-composite material combining hemp hurds with lime-based binder. Provides excellent insulation, breathability, and carbon-negative construction.

Straw Panels

Prefabricated straw panels offer superior insulation values, fire resistance, and rapid construction times while using agricultural waste products.

Straw Fiber

High-performance wood fiber insulation boards that regulate moisture, provide acoustic insulation, and maintain healthy indoor air quality.

All our materials come with full certification documentation available for download. We prioritize transparency and quality assurance in every aspect of our construction process.

our work

Connect With Us

Ready to Start Your Eco-Home Journey?

Get in touch with our team for a free consultation and site audit. We'll help you understand the possibilities for your property and provide a detailed cost estimate.

  • Free energy efficiency assessment
  • Custom design consultation
  • Detailed project timeline
  • Transparent pricing breakdown

Contact us

Office in Belgium

[email protected]

Phone: +32 488 880 947

WhatsApp

Office in Slovakia

Email: [email protected]


Follow Our Journey

Stay connected with HPM Company on social media to see our latest projects, construction updates, and eco-building tips. Join our community of sustainable living enthusiasts and discover how natural materials are transforming modern construction across Europe.

"Building the future, naturally. HPM Company — where European values meet sustainable innovation."

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