National Sales Support
JHB Head Office
Order Thermal,
PolyFloor - Polystyrene Insulation Boards, For
Below Concrete Floor Slabs,
Nationally & For
Export
Enhance efficiency from the ground up with PolyFloor—high-density polystyrene insulation boards made for below-slab and underfloor heating. Strong, moisture-resistant, and thermally efficient, they’re the smart choice for lasting comfort and energy savings.
Order Lead Time:
Generally 3 to 5 working days excluding weekends and public holidays. If you need it faster, please let us know so we can assist.
PolyFloor - Polystyrene Floor Insulation Boards
Detailed Product Overview
Important: POLYFLOOR Insulation Boards must be installed before casting the concrete slab. It is not a retrofit solution and must be planned during the design phase to ensure full compliance and performance.
POLYFLOOR is a high-performance expanded polystyrene (EPS) insulation board, designed for installation beneath concrete surface beds.
It meets the minimum thermal R-value of 1.00 required by SANS 10400 Part XA, ensuring your project complies with national energy efficiency standards.
When underfloor heating is used, insulating beneath the slab is a building code requirement.
POLYFLOOR prevents valuable heat from escaping into the ground, maximising efficiency and reducing energy costs. It also prevents the cold ground form cooling the floor slab in cold winter months.
It also enhances everyday comfort by adding underfoot warmth and year-round thermal luxury.
Made from high and extra-high-density EPS, POLYFLOOR offers excellent compressive strength, making it suitable for load-bearing floor systems.
It is EPSASA approved, fully SANS 10400-XA compliant, and a proven insulation choice for residential, commercial, and industrial buildings.
Key Product Benefits
Meets the minimum R-value of 1.00 as required by SANS 10400-XA for surface bed insulation
Mandatory when installing underfloor heating systems in line with building code
Improves energy efficiency and reduces heating costs
Adds underfoot thermal comfort and year-round luxury
Manufactured from high and extra-high-density EPS for superior compressive strength
Not a retrofit solution – must be installed before casting the concrete slab
EPSASA approved and compliant with South African building standards
Quick and simple to install during the construction phase
Proven solution for residential, commercial, and industrial floors
Nationally available and export-ready for international projects
For the cost, POLYFLOOR is one of the smartest ways to start any energy-efficient new build. You only get one chance to insulate your floor — before the concrete slab is cast. By meeting the required R-value of 1.00 and complying with SANS 10400-XA, POLYFLOOR ensures long-term energy savings, underfoot comfort, and full compliance from day one.
Thermal Insulation Values
Understanding thermal insulation values is essential when designing and specifying building insulation.
POLYFLOOR expanded polystyrene insulation boards have a K-value of 0.035 W/m·K, providing excellent thermal resistance to reduce heat transfer through roof slabs.
Thermal R-values are calculated by dividing the thickness of the material (in meters) by its K-value, so by adjusting thickness, you can achieve the required thermal performance for your project.
Below are typical POLYFLOOR Thermal R-values by thickness:
30mm — 0.857
35mm — 1.000
40mm — 1.143
50mm — 1.429
60mm — 1.714
70mm — 2.000
80mm — 2.286
90mm — 2.571
100mm — 2.857
110mm — 3.143
120mm — 3.429
150mm — 4.286
The difference in floor insulation is easy to feel underfoot — insulated floors provide a noticeably warmer, more comfortable surface compared to uninsulated floors, which can feel cold and drafty. This simple touch point greatly enhances the overall comfort of any building.
Generally POLYFLOOR and POLYWALL Insulation are ordered at the same time to avoid delays in constructions.
Where Do We Manufacture This?
Johannesburg
Cape Town
Durban
Port Elizabeth
Do We Keep Stock?
We keep some stock in our Johannesburg Warehouse. Check with our sales team.
In Cape Town, Durban and Port Elizabeth, we cut our polystyrene on order.
Where Will You Deliver This To?
Locally, Nationally & Internationally depending on the size of the order.
We won't deliver small orders long distances, but call us to enquire.
Can I Collect This Product?
We only offer collection from our Strydompark warehouse in Randburg, Gauteng.
We don't offer collection in:
Cape Town
Durban
Port Elizabeth
Current Lead Times
Generally 3 to 5 working days excluding weekends and public holidays. If you need it faster, please let us know so we can assist.
Polystyrene Insulation Density
We manufacture this product in the following densities:
High (20 & 24 kg/m3)
Extra High (30 kg/m3)
Polystyrene Insulation Dimensions
Our standard board sizes by thickness (mm) x width (mm) x length (mm) are:
30mmx 1200mm x 2500mm
40mm x 1200mm x 2500mm
50mm x 1200mm x 2500mm
75mm x 1200mm x 2500mm
100mm x 1200mm x 2500mm
125mm x 1200mm x 2500mm
150mm x 1200mm x 2500mm
200mm x 1200mm x 2500mm
300mm x 1200mm x 2500mm
600mm x 1200mm x 2500mm
Why Choose
Us?
+17500
National Polystyrene Orders Delivered Since
2016
+37254
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Highest & Most Google Reviewed National Polystyrene Supplier In South Africa
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Polystyrene Product Company
Where Builders & Bulk Buyers Order Bulk Polystyrene Direct, Nationally, In South Africa
National Sales & Head Office
Unit 8, Lower Ground Level, Commercial City, Tungsten Rd, Strydompark, Randburg, 2194
VAT Number: 4220273447
CO. Reg Number: 2016/072709/07
National Head Office Number:
011 678 5626
Main Email: sales@polystyrene.co.za