National Sales Support
JHB Head Office
Order Thermal,
PolyWall - Polystyrene Insulation Boards, For
Cavity Wall Insulation
Nationally & For
Export
Boost energy efficiency the smart way—our PolyWall, polystyrene cavity wall insulation boards deliver high thermal performance, moisture resistance, and long-lasting durability. Lightweight and easy to install, they’re the cost-effective choice for warmer, more efficient buildings.
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.
PolyWall - Polystyrene Wall Insulation Boards
Detailed Product Overview
PolyWall polystyrene insulation boards are SANS 10400-XA compliant and designed for cavity walls.
With a thermal value of 1 or more, architects specify PolyWall to meet building standards.
Made from medium-density EPS, it offers excellent insulation at a more cost-effective rate than XPS. Lightweight, easy to install, and supplied nationwide from our trusted network.
Key Product Benefits
SANS 10400-XA compliant
Thermal value of 1+
Medium-density = cost saving
Ideal for cavity wall use
Easy to handle and install
Nationwide delivery available
Thermal Insulation Values
Understanding thermal insulation values is essential when designing and specifying building insulation.
POLYWALL 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 POLYWALL 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
A well-insulated building includes insulation in the floors, walls, and roof—working together to create a thermally efficient envelope. This balanced approach reduces heat loss, improves comfort year-round, and ensures full compliance with energy efficiency standards
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 Medium Density (15 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
Dedicated Facebook Followers
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