National Sales Support
JHB Head Office
Order Precision-Cut
Polystyrene Sheets & Blocks
Nationally & For
Export
Lightweight, versatile, and built to perform—our polystyrene sheets and blocks are the perfect solution for insulation, crafting, packaging, and more. Easy to cut, shape, and handle—get the job done without the bulk or the cost!
See a more detailed description below.
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.
Polystyrene Sheets & Blocks
Detailed Product Overview
We are specialist suppliers of high-quality polystyrene sheets, trusted across the construction, manufacturing, cold room, creative, hydroponics, and marine industries—and many more.
We stock and distribute low, medium, high, and extra-high-density expanded polystyrene (EPS) sheets in a wide range of sizes, up to 6 metres long, 600mm high, and 1220mm wide, tailored for everything from insulation and packaging to custom fabrication and floatation.
With deep product knowledge, we actively help clients understand the importance of choosing the correct density for their application, whether it’s load-bearing insulation, moisture resistance, or precision cutting.
Our experienced team is always available to offer free advice and technical guidance, ensuring you specify the right solution the first time.
Our polystyrene sheets are readily available nationwide and supplied to leading construction projects throughout South Africa and neighbouring export markets.
From residential housing developments and shopping centres to cold storage facilities, warehouses, hospitals, schools, and large-scale infrastructure, our
EPS products are trusted for their performance, compliance, and versatility.
We supply bulk materials for roof insulation systems, under-slab insulation, void formers, cavity wall insulation, expansion joints, and more.
With proven delivery capacity, expert support, and competitive pricing, we are a preferred partner for contractors, developers, architects, and engineers across Southern Africa.
Key Product Benefits
Full Range of Densities – We offer low, medium, high, and the highest-density EPS sheets available, ensuring the right solution for every application—from lightweight packaging to heavy-duty construction insulation.
Custom Sizes & Large Format Options – Available in lengths up to 6 metres, 600mm in height, and 1220mm wide, with the ability to cut to size, shape, and specification for your project.
Expert Guidance – Our team offers free technical advice to help you choose the right density and product for your needs, reducing the risk of costly errors and underperformance.
Specialist Knowledge – With years of experience supplying to the construction, manufacturing, cold chain, hydroponics, marine, and creative industries, we understand your unique application challenges.
Nationwide Supply & Export Ready – We efficiently serve clients across South Africa and neighbouring countries, managing cross-border logistics with ease.
Seamless Order Management – Whether you're ordering locally or internationally, we streamline the process to save you time and effort, keeping you informed at every stage.
Trusted Industry Supplier – Our products are used by top builders, engineers, architects, cold room installers, packaging manufacturers, and creative fabricators who count on us for reliability and quality.
Compliance & Quality – Our sheets meet strict quality and dimensional standards, and our insulation products comply with SANS 10400-XA and are EPSASA approved where required.
Thermal Insulation Values
Expanded Polystyrene is an exceptional insulation material that is extensively used in many industries in South Africa and internationally. In some specific applications density and compressive strength are equally important.
Compressive strength matters, and using the wrong type can compromise performance. Cutting corners could result in the failure of the entire application.
Choose from our POLYFLOOR, POLYWALL, and POLYROOF insulation boards to ensure you’re specifying the right product for long-term success.
Understanding thermal insulation values is essential when designing and specifying building insulation.
Expanded Polystyrene Sheets 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 Polystyrene Sheets 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
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 Sheets Density
We manufacture this product in the following densities:
Low (12 to14 kg/m3)
Medium (15 kg/m3)
High (20 & 24 kg/m3)
Extra High (30 kg/m3)
Polystyrene Sheets Dimensions
Our standard board sizes, thicknesses, widths and lengths are:
Order standard board thicknesses are:
10mm, 20mm, 25mm, 30mm, 40mm, 50mm, 75mm, 100mm, 125mm, 150mm, 200mm, 300mm & 600mm
Our standard board widths are:
600mm & 1200mm
Our standard board lengths are:
2500mm, 3000mm, 6000mm
If you are looking for diferent sizes, no problem - Just explorer our custom-cut options and request a quote.
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