Our building system makes use of well-established building materials such as expanded polystyrene (EPS), magnesium oxide (MgO) board and fibreglass mesh.

These are cost-effective construction materials with excellent insulation properties that have a low impact on the environment and are recyclable.

Extensive experience has been gained through field and laboratory testing in collaboration with our partners. Here we explain it step by step.


1. Waterproof paint
The exterior is coated with a synthetic material that is weather resistant. As a result, it shows none of the usual weaknesses exhibited by standard external paint, such as cracking or spalling.
2 and 3. Plaster with fibreglass mesh
The EPS & MgO boards are sandwiched between glass fibre mesh and reinforced plaster. The external plaster is up to 6 mm thick. A copolymer additive makes it robust, waterproof and elastic. The internal plaster is up to 12 mm thick, helps to regulate humidity and can be used for the same decorative purposes as traditional walls.
4 and 5. EPS and MgO
The core material is a 180 - 240 mm thick EPS 30, which has excellent thermal insulation properties and makes for an extremely durable structure.
5. Foundation
The foundations are conventional concrete raft foundations with thickened edge beams. Foundations are always signed off by a registered professional engineer.
6. Bituminous DPC
After casting the foundation, a bituminous damp proof course (DPC) is applied at the position of the walls for the prevention of rising damp.


A beautiful design, green approach and robust structure, but also…



The system is fully compatible with all standard building elements such as windows and doors. Photovoltaic panels can be installed on the plaster without additional structural elements.

Fast Building

Our materials and building methods simplify construction, in such a way that our buildings can be erected faster than conventional building systems and with low-skilled labour.

Beautiful & Unique Design


Through the use of computerised machines to cut our panels, the CITRA houses can take any shape at no additional cost.

With CITRA the sky is the limit!


Great Insulation

Our system provides excellent thermal insulation which allows for perfect indoor temperatures in winter and summer, with up to 70% lower heating and cooling energy expenses.

Robust Home

With CITRA you are building from the outside in, guarding your home against the elements and protecting the investment inside. CITRA homes have a fire rating of one hour and the seamless design reduces the potential for structural defects, withstanding earthquakes and storms of up to 250 km/h


Environmental Benefits

CO2 reduction of a CITRA house:

- 45% during construction
- at least 10% during use
- 45% at the end-of-life cycle.