Isoboard Ceiling Boards – Premium XPS Thermal Insulation for Modern Comfort
For over two decades, Isoboard Ceiling Boards have set the benchmark for high-quality, rigid thermal ceiling insulation in South Africa. Manufactured from extruded polystyrene (XPS), Isoboard offers unmatched thermal efficiency, moisture resistance, and durability, making it the go-to ceiling board for homeowners, builders, and architects seeking both performance and aesthetics.
Engineered for energy efficiency, Isoboard Ceiling Boards reduce the need for excessive heating or cooling — ensuring your indoor spaces remain consistently comfortable while lowering energy bills. The sleek, white surface can be left as is or painted, offering a clean, modern appearance that complements any interior style.
Why Choose Isoboard Ceiling Boards?
Isoboard isn’t just another ceiling product. It’s a rigid, closed-cell XPS insulation board that delivers measurable results: superior R-values, minimal water absorption, and long-lasting performance. Unlike soft insulation materials, Isoboard retains its shape and insulating properties for decades — making it one of the most reliable thermal solutions available today.
All Isoboard Ceiling Boards Specifications
| Thickness | Product Type | Nominal R-Value (Thermal Resistance) | Thermal Conductivity (W/m·K) | Width | Length | Compressive Strength (kPa) | Water Absorption (Vol%) |
|---|---|---|---|---|---|---|---|
| 30mm | Isoboard XPS Ceiling | R-1.05 | 0.028 | 600 mm | 1.8 m – 8 m | 300 | ≤ 0.3% |
| 40mm | Isoboard XPS Ceiling | R-1.40 | 0.028 | 600 mm | 1.8 m – 8 m | 300 | ≤ 0.3% |
| 50mm | Isoboard XPS Ceiling | R-1.75 | 0.028 | 600 mm | 1.8 m – 8 m | 300 | ≤ 0.3% |
| 80mm | Isoboard XPS Ceiling | R-2.80 | 0.028 | 600 mm | 1.8 m – 8 m | 300 | ≤ 0.3% |
Thermal Resistance (R-Value):
The R-value measures how well a material resists heat flow. Higher R-values mean better insulation. Isoboard’s closed-cell structure ensures consistent performance across all thicknesses — giving you excellent energy efficiency for any application.
Water Resistance:
Thanks to its closed-cell XPS structure, Isoboard absorbs less than 0.3% water by volume, making it one of the most water-resistant insulation materials available. It does not warp, swell, or lose its insulating ability, even in high-humidity environments — a huge advantage over fiber or open-cell materials.
Key Benefits of Isoboard Ceiling Boards
1. Exceptional Thermal Insulation
Isoboard Ceiling Boards reduce heat transfer through ceilings, helping maintain consistent indoor temperatures throughout the year. In summer, it keeps interiors cooler by preventing roof heat from radiating into your living spaces. In winter, it traps warmth inside, drastically reducing heating needs.
2. Energy Efficiency and Cost Savings
With up to 40% savings on energy bills, Isoboard is a smart investment for any property owner. By minimizing heating and cooling requirements, you reduce electricity consumption and carbon emissions — contributing to both lower costs and a more sustainable home.
3. Water and Moisture Resistance
Unlike traditional ceiling boards, Isoboard Ceiling Boards closed-cell composition resists moisture absorption. It will not rot, sag, or harbor mould — even in coastal or humid regions. Its low ≤0.3% water absorption rate ensures a clean, stable ceiling surface that lasts for decades.
4. High Compressive Strength
Isoboard Ceiling Boards offer a compressive strength of approximately 300 kPa, ensuring excellent rigidity and long-term dimensional stability. This makes it suitable not only for ceilings but also for structural applications like under-floor insulation or beam overlays.
5. Lightweight and Easy to Install
Installation is straightforward, reducing Labour time and costs. The lightweight panels can be cut easily and installed using standard tools — ideal for both new builds and retrofits.
6. Aesthetic and Maintenance-Free Finish
Isoboard’s smooth, white surface provides a sleek, modern ceiling look straight out of the box. Many homeowners choose to leave it unpainted, while others paint or skim it for a customized aesthetic.
7. Fire and Pest Resistance
XPS Isoboard is treated to resist ignition and will not support flame spread once the ignition source is removed. Its solid foam structure also makes it naturally resistant to pests and insects, unlike fibre-based insulation.
Additional Applications Of Isoboard Ceiling Boards
Isoboard’s versatility goes far beyond standard ceilings. Its rigid structure and high insulation properties make it suitable for a wide range of uses:
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Standard Ceilings: Installed directly as an attractive, finished ceiling with high insulation performance.
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Over Beams: Ideal for concealing structural beams while maintaining a smooth, continuous ceiling finish.
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Between Walls: Provides superior insulation in cavity wall applications, reducing thermal bridging.
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Under Floors: Used as under-floor insulation for raised or suspended floors, helping prevent heat loss through the ground.
Isoboard Ceiling Boards can also be used as a base for roof liners, cladding systems, and decorative bulkheads — offering functional and aesthetic advantages in one.
Environmental and Sustainability Advantages of Isoboard Ceiling Boards
Isoboard Ceilings are manufactured with environmental responsibility in mind. The product contains no CFCs or HCFCs and is 100% recyclable. By significantly lowering heating and cooling needs, Isoboard contributes to long-term reductions in greenhouse gas emissions — making it both an economical and eco-friendly choice.
Choosing the Right Isoboard Thickness
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30mm Isoboard – Suitable for mild climates or interior partitions where minimal insulation is required.
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40mm Isoboard – The most popular option for residential ceilings, offering a strong balance between comfort and cost.
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50mm Isoboard – Ideal for homes in cooler regions or for premium energy performance.
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80mm Isoboard – Maximum insulation for high-efficiency buildings, commercial spaces, or eco-homes focused on ultimate comfort.
Technical Summary of All Isoboard Ceiling Boards
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Material: Extruded Polystyrene (XPS)
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Thicknesses: 30mm, 40mm, 50mm, 80mm
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R-Values: 1.05 – 2.80
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Compressive Strength: 300 kPa
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Thermal Conductivity: 0.028 W/m·K
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Water Absorption: ≤ 0.3%
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Panel Width: 600 mm
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Lengths: 2.4 m – 8 m
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Finish: Smooth white face, ready for installation or painting
The Isoboard Difference
When you choose Isoboard, you’re choosing a ceiling system that combines South African engineering, superior insulation, and a lifetime of comfort. Its durability, resistance to moisture, and energy-saving design make it a future-proof investment for both residential and commercial spaces.
Upgrade your home comfort today with genuine Isoboard Ceilings!
Experience unbeatable thermal insulation, sleek design, and lasting performance. Available in 30mm, 40mm, 50mm, and 80mm thicknesses for every application.
👉 Order your Isoboard Ceiling panels now and start saving on energy bills while enjoying year-round comfort.
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