The thermally-insulated Modula panels are 1.2m wide x 110mm thick x 2.4 or 2.7m high, which enables the panels to be handled easily by three people. Each composite structurally-insulated panel has two 10mm external skins, comprising of fire-rated magnesium oxide outer boards and structural plaster, either side of an internal core of polyurethane to make them thermally efficient. Plumbing and electrical conduits as well as plug boxes
and switch boxes are prefixed into the composite panels – so there is no need for chasing on-site – and aluminium or steel or timber windows and door frames are foamed into the panels. Timber window frames can be fitted on-site if required.
The panels are certified by SA Agre’ment and compliant with the US (IRC R614) building code.
The building process
• Construct a light concrete raft foundation or erect Vela’s steel floor beams on plinths with a floorboard
surface (concrete screed optional).
• Fix a bottom track to the foundation with anchor bolts.
• Three workers can carry one panel (which weighs up to 80kg), and slot it over the prefixed bottom track. One
panel slots into the next by means of a male-female connection detail.
• Screw-fix all joints to secure the panels.
• Once the panels have been erected, fix a ringbeam over the panels to form an additional locking mechanism. A team of six can erect the walls of a 40m² house in two days.
• The light concrete roof tiles or sheeting. Erect the roof trusses and fix them to the ringbeam.
• Close the joints with an expandable waterproof compound.
• Fix an alkaline-resistant fibreglass mesh to the board and apply a polymerbased plaster to the mesh.
• Paint the plaster once it has dried.
• Fix the ceiling boards to the ceiling brandering.
• Joint and then skim-plaster the internal panels.
• Draw the wiring for the electrics through the conduits.
• Complete the finishes as per client’s specification.
Vela Steel Building Systems: Tel +27 11 864 8306; firstname.lastname@example.org; website: www.velasbs.co.za
• Simple one, two and three-bedroom homes ranging from 26-102m².
• Basic finishes can be included.
• Roof structures are generally sheeted gable roofs.
• Comfortable and modern two and threebedroom homes.
• Various styles available from 60-105m².
• Roof options include dutch-gable, hipped roof or standard gable with sheeting, concrete roof tiles or Harvey tiles.
• Modern double-storey flats.
• Double-storey row housing/duplexes, optimising land space yet affording the client their own private garden.
• Contractor camps and offices.
• School classrooms and clinics.
• Housing for mining staff throughout Africa.
• Offices, modular banks, and retail outlets.
• Perimeter walling.
• Lodges for game farms