- Isoboard ceilings in Cape Town: supply and installation of insulated ceiling boards.
- Isoboard is a brand of extruded polystyrene (XPS) insulation board. People often use the name for any XPS ceiling board, such as Summit XPS.
- The board acts as both ceiling and insulation, which suits open-beam and exposed-truss roofs.
Tell us about the roof and compare insulated ceiling quotes in Cape Town.
Compare QuotesWhere Insulated Boards Suit
- Exposed-beam roofs, where boards fit over or between rafters.
- Garages, outbuildings and extensions with no ceiling.
- Homes that want a ceiling and roof insulation in one job.
- Retrofit over existing brandering, depending on the product and roof.
Finishes
| Finish | Notes |
|---|---|
| Factory white face | Many XPS ceiling boards come with a white finish, so the ceiling is complete once fixed |
| Painted | Use a paint the manufacturer approves for the board |
| Visible joints or beams | Tongue-and-groove edges give neat joint lines; exposed beams add a feature |
Product Claims to Check
- Thermal performance depends on board type and thickness. Use the manufacturer's published figures, not a salesperson's estimate.
- Ask about fire performance and the manufacturer's fixing method, especially around downlights and other heat sources.
- Ask which light fittings are suitable and what clearances apply.
- New buildings and extensions must meet SANS 10400-XA energy-efficiency rules. Your designer or contractor confirms what applies.
Installation Process
- Roof check and measurements.
- Battens fixed where needed.
- Boards fixed with clips and adhesive according to the manufacturer's method.
- Cornice and trims fitted, light openings cut.
Isoboard Ceiling Prices
| Item | Ballpark price |
|---|---|
| 30 mm XPS ceiling, installed, per m² | About R440 |
| 40 mm XPS ceiling, installed, per m² | About R490 |
| 50 mm XPS ceiling, installed, per m² | About R540 |
| Between exposed beams, per m² | About R400 |
Ballpark figures, not quotations. From a Cape Town installer's published 2026 price list for XPS ceiling boards, including VAT, boards, clips, adhesive, labour and standard cornice, checked October 2026. Other installers and products will differ, and travel fees may apply. A site visit and a written quote set the actual price.
Compare with other systems in the ceiling installation price guide.
Get prices for your actual ceiling rather than a range. Free, with no obligation to appoint anyone.
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Give the roof type, room size, the board thickness you are considering and whether beams stay exposed. Compare quotes through Ceiling Repairs Cape Town.
Frequently Asked Questions
Is isoboard a ceiling or insulation?
Both. The XPS board insulates and, with a finished face, also forms the ceiling.
Which thickness should I choose?
Thicker boards insulate more and cost more. Use the manufacturer's data and, for new work, what SANS 10400-XA requires for your building.
Can isoboard be painted?
Many boards come pre-finished. If you paint, use a paint the manufacturer approves for that board.
Can I install downlights in an isoboard ceiling?
Only fittings and clearances the board manufacturer approves. Have a registered electrician do the wiring.
Related Pages
Ceiling Repairs Cape Town is a free quote-comparison service. Ceilings are assessed, quoted, installed and repaired by independent ceiling contractors, and your agreement is with the contractor you appoint. Ask each one for a written, itemised quote, what is and is not included, any guarantee and the payment terms before paying anything.
Isoboard Ceilings Cape Town. Describe the roof once and compare isoboard ceiling quotes.
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