CITRA alternative building system - Technical section

Technical Section

The health of our planet is at the forefront of CITRA – Live Different.
We make sure that we meet our objective in everything we do.
If you want to learn more about how our green building method works, keep reading.

Design, Supply & Fit


As the design subcontractor, CITRA crafts your bespoke project using the CITRA System, in collaboration with our architecture team and our construction team. Thereafter, CITRA supplies and installs the system on-site, until it’s ready to hand over to the main contractor.

The CITRA System is beneficial to many projects, either as a whole structural envelope and/or as exterior and interior infill panels. It can easily be featured in Residential, Commercial and Industrial projects.

Main Contractor


As the main contractor, CITRA guarantees quality, construction program, and cost. We take full ownership of the construction site, manage all stakeholders and comply with all applicable legislation in order to deliver a great project.

Ideally, we work with the architect or the client from an early phase of the project to ensure that the project takes full advantage of the CITRA System.

Building With CITRA System means

Cost Effective Building Method

CITRA Rates*

External wall panels                      R750 – R950 per m²

Roof panels                                      R950 – R1,050 per m²

Internal non-structural panels    R950 – R1,050 per m²

* Including supply and installation of the panels, plastering, painting on both sides, and full waterproofing of the roof panels.

** The final prices may vary depending on each project. They can be higher or lower than the indicative prices.

Fast Construction

The CITRA System is designed for easy and fast assembly on site.
The core of CITRA panels is lightweight and practical to assemble, fast-tracking the construction process.
The application of the structural plaster is mechanically applied, eliminating the time spent on the normal hand application.
Erecting the external walls and the roof of a single storey residential house will only take 1 day.

Limitless Design Possibilities

CITRA System can take any shape at no extra cost, thanks to automated manufacturing through CNC and automated documentation through parametric design.
From a material perspective, there’s no limit to the radius of the bend of the CITRA System.
A structural assessment is made on a case-by-case by a registered engineer using Finite Element Modelling (FEM).

CITRA Construction_faster, robust and cheaper building system

Robust Structure

Wall/roof fixing:

  • The CITRA System is tested and certified for heavy-duty fixation of up to 136 kg without any damage.
  • The CITRA System can accommodate for folding and or stacking doors.


  • CITRA System allows for a cantilever of approx. 1.5m. Individual assessments will be required depending on the load and shape by a registered engineer.

Shear strength: ASTM D1002

A CITRA System panel can take a maximum of 1.1 MPa and 0.47 KN of flexural horizontal loading and angular loading respectively for twisting and preventing the wall failure.

CITRA Alternative Building Robust System_Shear strength

Fire Resistance: SANS 10177 - 2

The CITRA Building System has a 60-minute Fire Resistance Rating (FRR). Same as a plastered load-bearing 90mm hollow concrete block has an FRR of 60 minutes.

SANS 10177 – 2: FR60

  • Integrity (E): 60 minutes
  • Stability (R): 60 minutes (non-load bearing)
  • Insulation (I): 60 minutes

Fitting, Plumbing & Pipes

CITRA System’s surface is a high quality plaster finish. Installing and/or refurbishing light fittings, plumbing pipes or even adding or removing openings is easy and won’t leave any visible nor structural trace. It can be easily skimmed, painted or tiled over to achieve the perfect finish.

CITRA robust building system - 136kg

Thermal insulation: SANS 10400-XA

CITRA System has an R-value of 2.2 m²K/W (140mm), exceeding considerably the minimum thermal performance required in SANS 10400-XA.

The higher the R-value, the better the insulation performance. As reference:

  • A cavity wall (90-50-90) has an R-value of 0.63 m²K/W.
  • The minimum is 1.9 m²K/W, which is required for non-masonry walls, and comply with the requirements for climate regions as per SANS 10400-XA standards.

CITRA System offers a comfortable building envelope that best regulates the internal temperature. Staying cool during summer heatwaves and keeping warm throughout winter.

Follow this link and test it yourself!

Water Penetration

CITRA System core material, EPS, does not absorb moisture and its mechanical and insulating properties are not degraded by rain or steam. All CITRA panels are resistant to the adverse effects of humidity, meaning durability for the entire life span of the building.

Request the test here

Sound Absorption: ISO 140/IV1 and ISO 717

CITRA System has an estimated sound absorption value of DnT,w=46 dB and complies with the following building types:

  • Dwellings attached and detached
  • Schools
  • Commercial
  • Industrial
  • Large  and small shops 
  • Offices and day clinics
  • External walls of hotels, hospitals/clinics, hostels/dormitories 

Environmental Impact

Our core material, Expanded Polystyrene (EPS) is lightweight, safe, sustainable, non-toxic, non-flammable, and fully recyclable. It is composed of the organic elements of carbon, hydrogen and oxygen) and does not contain chlorofluorocarbons (CFCs) nor hydrochlorofluorocarbons (HCFCs).

Our EPS contains up to 20% recycled material and 100% of the offcuts from the production are recycled. Later on, during the life cycle of the building, it can always be fully recycled by any EPS manufacturer in South Africa, without any extra costs. 

EPS is designated by plastic resin identification code 6.

Learn More In Our Green Document

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