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PolyWall - Polystyrene Insulation For Cavity Walls

Order medium density polystyrene cavity wall insulation boards in JHB, CT, Durban, East London & Port Elizabeth. Now on special!
In stock
Product Details
Brand: PolyWall
Board Size: 1200mm x 2500mm
Product Type: Expanded Polystyrene Insulation
Availability: Delivered Nationally In South Africa & For Exprot
Estimated Lead Time: Currently 3 to 7 working days excluding weekends & public holidays
Fire Rating: B1
Applications: Cavity Wall Insulation
Joining Mechanism: Butt Joint
Standard Board Width (mm): 1200

Order PolyWall - Medium-Density Polystyrene Insulation Boards & Cavity Walls

On Special Today!

You can simply order online or request a quote from us now!

PolyWall boards are revolutionary polystyrene wall insulation boards that are both fire-retardant and extremely lightweight. They provide superior thermal insulation and soundproofing, making them the perfect choice for residential and commercial buildings alike. PolyWall cavity wall insulation boards are easy to install and provide superior protection against fire and moisture. This makes them the ideal choice for any insulation projects.

In terms of South African building regulations, to get the required cavity wall thermal insulation R-Value of 1, you need a minimum thickness of 40. The thicker you go the more insulation your get.

Each board is 3m2 so you will need to divide the total wall insulation area by 3 to get the number of boards you require.

Best of all is that you can simply order these boards nationally online for collection or delivery from any of our national distribution centres located in:

  • Strydompark in Gauteng
  • Philippi in Western Cape
  • Clairwood in Kwazulu-Natal
  • Wilsonia in East London or
  • Neave Industrial in Port Elizabeth

In fact, there is no faster or easier way to order polystyrene wall insulation nationally online in South Africa.

You will probably want to order these boards with our PolyFloor Concrete Floor Insulation Boards because generally these get used in quick succession.

Order lead time is generally 3 to 7 working days for cutting and delivery, once payment reflects in our bank account. This lead time excludes public holidays and weekends. If you need product faster please call us so that we can try and assist.

Our national online ordering platform is designed for busy building contractors, property developers, architects, quantity surveyors and home owners. There really is no easier or faster way to order this product nationally online in South Africa.

Save Time & Money & Simply Order Your PolyWall Insulation Nationally Online Today!

Order Collections & Deliveries

Please note that our national distribution centres are not walk-in shops. They are industrial distribution centres from which you will be able to collect your order or from which we will deliver your order.

Our online ordering platform offers local deliveries from these distribution centres so if your project is far from these locations then you will have to collect your order from the distribution centre closest to you.

For big orders we will deliver nationally and across border!

Board Prices

The prices displayed are board prices excluding VAT.

Online & Offline Payment Methods

Our Payfast Secure Encrypted Online Payment Gateway allows our customers to pay directly online using any of the following cards or options:

  • Visa Credit Cards & Debit Cards
  • Mastercard Credit Cards & Debit Cards
  • Makro Store Cards
  • Builders Warehouse Store Cards
  • Game Store Cards
  • Cape Union Mart Store Cards
  • CTM Store Cards
  • RCS Store Cards & More
  • Instant Online EFT Payment

Alternatively you can order online and request an invoice for normal EFT payment.

What is Perimeter Wall Cavity Wall Insulation?

  • Cavity Wall Insulation is the insulation layer that is placed between the inner and outer brick layers of the outer perimeter walls of a building.
  • This insulation layer significantly reduces the transfer of heat and cold through the external perimeter walls of buildings.
  • In summer the sun-facing exterior walls get hot and this heat is kept out of the living space by the cavity wall insulation.
  • In winter this cavity wall insulation keeps the cold out.
  • Cavity wall insulation significantly reduces the energy consumption of such HVAC systems use to keep buildings at room temperature.

Architect & BOQ Specification

" x 1200mm x 2500mm Medium Density, Fire Retardant, PolyWall Cavity Wall Insulation Boards By Polystyrene Product Company. Specifically Designed For Cavity Wall Insulation Applications.

Per m2 Prices

If you are looking for quick per m2 prices, then just divide the board price by 3 since each board is 3m2.

PolyWall Thicknesses & Thermal Insulation R-Values:

Board Thickness Thermal Insulation (R-Value)

40mm 1.143 (Recommended)
50mm 1.429 (Recommended)
75mm 2.145
100mm 2.857
120mm 3.429
150mm 4.286
200mm 5.714
300mm 8.571

Order Process:

  • First decide on the thickness you want. (The thicker the boards, the more insulation)
  • Add the boards and quantities you want to you order.
  • Select the collection & delivery options
  • Pay for your order online or submit your order for review.
  • Fast & Easy!

About Polystyrene Product Company (Pty) Ltd

Polystyrene Product Company, established nationally in South Africa in 2016, is a well known & respected bulk national supplier of polystyrene sheets, blocks, insulation, extruded polystyrene ceilings & void-formers in South Africa & for export.

Since 2016, we have supplied polystyrene to over 14000 customers nationally in South Africa, Botswana, Mozambique, Zambia, Zimbabwe & Mauritius. We have also supplied bulk polystyrene to many of the biggest construction projects in South Africa.

We are the #1 National Online Ordering Platform For Bulk Polystyrene In South Africa, making it easier and faster for architects, builders, bulk buyers & the general public to order polystyrene online in SA.

CO. Reg Number: 2016/072709/07

VAT Number: 4220273447

National Sales & Logistics (Johannesburg) 011 678 5626

Cape Town Sales 021 200 5926

Durban Sales 031 940 7056

East London & PE Sales 087 095 3259

Save this product for later

#1 Google Reviewed, Bulk, National, Polystyrene Supplier In South Africa

Since 2016, We Remain Most & Highest Google Customer Reviewed, Bulk, National, Direct, Polystyrene Supplier In South Africa. 


Recent Delivery Locations


Landmark Bulk Polystyrene Projects Supplied

Since, 2016, we have worked closely with many of South Africa's largest construction companies and supplied polystyrene to several of the landmark polystyrene building projects nationally and to neighboring countries. Some of these include:

Cape Town Convention Center Extension Concrete Roof Insulation Project

1400m2 of 120mm Extra-High Density Concrete Roof Insulation (PolyRoof Insulation) Laid On Top Of Torch-On Waterproofing With Paving Overlay

Polystyrene Insulation - Cape Town Convention Centre / Polyroof
PolyVoid - Structural Fill Blocks

Nelson Mandela Children's Hospital Raised Slab Project 

3000m2 of 50mm Extra-High Density Concrete PolyVoid Fillers To Raise An Existing Concrete Slab By 1m. Extra-High Density Polystyrene Has Incredible Compressive Strength Properties.

About Polystyrene Product Company (Pty) Ltd

About Us

Why Polystyrene Product Company (Pty) Ltd

Established Nationally in 2016

Highest Google Reviewed Supplier

Anybody Can Order Direct

Respected Bulk Suppliers

Suppliers To Many Bulk Buyers

Polystyrene Specialists

Technical Experts

High Quality Products

Direct From Factory

Fast Ordering Platform

Well Known

Competitively Priced


No Minimum Orders

Over 35000 Facebook Followers

Polystyrene Order Lead Times

We Cut Hundreds Of Orders, Nationally In South Africa, Every Day.


We Cut On A First-Come-First-Serve Basis So The Faster You Place Your Order The Faster It Will Get Cut.


For Cutting & Collection

 3 - 5 Working Days, Excl. Weekends

For Cutting, Collection & Delivery

3 – 7 Working Days, Excl. Weekends


We May Also Have Stock On The Floor. You Will Have To Call Us To Make Arrangements

Office Hours: Monday - Friday 8am - 5pm

Online / Offline Payment Options

You Can Order Online & Request An Invoice To Pay Via Normal EFT

You Can Order Online & Pay Via:


  • Visa Credit & Debit Cards

  • Mastercard Credit & Debit Cards

  • Builders Warehouse Store Cards

  • RCS Store Cards

  • Game Store Cards

  • Cape Union Mart Store Cards

  • Makro Store Cards

  • CTM Store Cards & More

  • Instant EFT (Online)

Polystyrene Cutting &  Distribution

All National Client Orders Are Managed Centrally & Not Through Our Regional Factories.


We Cut & Deliver Polystyrene Nationally Directly From Our Cutting Facilities In:


Cape Town


East London

Port Elizabeth


We Cut, Deliver & Offer Collection At These Facilities.


Our Online Ordering Platform Deals With Local Deliveries. Call If You Don't Find A Delivery Option.

Bulk Buyer & Regular Buyer Polystyrene Quotes


Bulk Buyers or Regular Buyers will most likely qualify for bulk discounted rates based on order volumes. Please Explore Our Product Catalogue Above Before you complete our Product Specific Online Quote Forms below.

Our Quote Forms Can Take A Little Time To Load & Display.

Polystyrene Product Company

Your Trusted Specialists In Bulk Polystyrene For Concrete Floor Insulation, Cavity Wall Insulation, Concrete Roof Insulation, Thermal Ceilings & Void-Former Applications

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

Main Office Number:

011 678 5626


Main Email:

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