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MetecnoTherm PIR 70mm (R3.0)
$123.55 per/sheet inc. GST 123.552123.552
$42.90 p/m² inc. GST
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MetecnoTherm PIR 75mm (R3.2)
$131.18 per/sheet inc. GST 131.175131.175
$45.55 p/m² inc. GST
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MetecnoTherm PIR 80mm (R3.4)
$136.52 per/sheet inc. GST 136.521136.521
$47.40 p/m² inc. GST
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MetecnoTherm PIR 90mm (R3.85)
$151.97 per/sheet inc. GST 151.965151.965
$52.77 p/m² inc. GST
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MetecnoTherm PIR 100mm (R4.3)
$159.59 per/sheet inc. GST 159.588159.588
$55.41 p/m² inc. GST
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Styroboard XPS 25mm Slab Insulation R0.81
$25.51 per/sheet inc. GST 25.50925.509
$17.71 p/m² inc. GST
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Styroboard XPS 30mm Slab Insulation R0.97
$26.20 per/sheet inc. GST 26.20226.202
$18.20 p/m² inc. GST
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Styroboard XPS 40mm Slab Insulation R1.29
$34.93 per/sheet inc. GST 34.92534.925
$24.25 p/m² inc. GST
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Styroboard XPS 50mm Slab Insulation R1.52
$43.66 per/sheet inc. GST 43.65943.659
$30.32 p/m² inc. GST
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Styroboard XPS 60mm Slab Insulation R1.82
$52.38 per/sheet inc. GST 52.38252.382
$36.38 p/m² inc. GST
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Styroboard XPS 75mm Slab Insulation R2.27
$65.48 per/sheet inc. GST 65.48365.483
$45.47 p/m² inc. GST
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Foilboard Slabmate EPS 30mm R0.78
$327.91 per/pack inc. GST 327.91327.91
$7.59 p/m² inc. GST
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What PIR board slab insulation is and why it’s used

PIR board slab insulation is designed for projects where high thermal performance and structural reliability are both required beneath concrete slabs. PIR (polyisocyanurate) boards offer excellent R-values relative to thickness, making them a popular choice where space is limited but performance targets are high. This allows designers and builders to achieve energy efficiency requirements without increasing slab build-ups or excavation depth.

Unlike bulk insulation, PIR boards are rigid, engineered products that maintain their shape and thermal performance over time. When installed beneath a slab, they help reduce heat loss into the ground, improve internal comfort, and support the overall energy efficiency of the building. This makes PIR board insulation particularly attractive for energy-conscious residential builds and commercial projects working to strict performance specifications.

At Insulation Essentials, we regularly supply PIR slab insulation for projects that need predictable, specification-driven performance. Whether the focus is thermal efficiency, buildability, or compliance, PIR boards provide a dependable under-slab solution.

Where PIR board slab insulation is commonly used

PIR board slab insulation is most commonly used in residential slabs, extensions, multi-residential developments, and commercial buildings where insulation must perform under load. It is well suited to heated slabs, high-performance homes, and buildings designed to reduce ongoing heating and cooling demand.

These boards are often specified in projects where compressive strength and long-term stability are critical. Because PIR insulation is rigid and dimensionally stable, it integrates well with engineered slab systems and can be used beneath concrete without compromising performance. It is also frequently used in combination with other insulation products to create continuous thermal envelopes.

For retrofit or upgrade projects, PIR boards can be used where under-slab insulation is being introduced as part of a major renovation or rebuild. We work with builders, designers, and owner-builders across Melbourne and regional Victoria to ensure the correct PIR board is selected based on R-value requirements, slab design, and site conditions.

Installation & selecting the right PIR board

Installing PIR board slab insulation requires careful consideration of load requirements, substrate preparation, and compliance with Australian building standards. Boards must be installed on a properly prepared base to ensure even load distribution and prevent movement during the pour. Correct placement is essential to maintaining both thermal performance and structural integrity.

PIR slab insulation products are designed to meet NCC requirements when specified and installed correctly, but different boards offer different compressive strengths and performance characteristics. Choosing the right product for the slab design is critical, particularly where insulation is load bearing. Insulation Essentials supports customers with product selection guidance, helping ensure PIR boards match engineering and compliance needs.

Once installed correctly, PIR board slab insulation provides long-term, stable thermal performance without settling or degradation. If you’re working from architectural or engineering specifications, our team can help you source the right PIR insulation quickly and reliably, keeping your project on schedule and compliant from the ground up.

Slab Insulation

MetecnoTherm PIR 70mm (R3.0)

MetecnoTherm PIR 75mm (R3.2)

MetecnoTherm PIR 80mm (R3.4)

MetecnoTherm PIR 90mm (R3.85)

MetecnoTherm PIR 100mm (R4.3)

Styroboard XPS 25mm Slab Insulation R0.81

Styroboard XPS 30mm Slab Insulation R0.97

Styroboard XPS 40mm Slab Insulation R1.29

Styroboard XPS 50mm Slab Insulation R1.52

Styroboard XPS 60mm Slab Insulation R1.82

Styroboard XPS 75mm Slab Insulation R2.27

Foilboard Slabmate EPS 30mm R0.78

What PIR board slab insulation is and why it’s used

Where PIR board slab insulation is commonly used

Installation & selecting the right PIR board