Join 50,000+ Customers and Save Up to 25% Now

Up to 50% Cheaper Than High Street Retailers
Nationwide Delivery For Select Products & Locations
8082 Reviews | 4.4/5 Stars Gold Trusted Service Award 2021

Isover CWS 36 - Glass Mineral Wool Cavity Wall Insulation Slab

Reasons why homeowners choose this product:

  • Award winning customer support. Speak to our team online or by phone
Special Price £314.02 Regular Price £361.12
Call to Order
Estimated Delivery: 2-5 Days

4.4


8082 Reviews

Gold Trusted Service Award 2021

Product Overview

  • Award winning customer support. Speak to our team online or by phone
Click here to view more product information. Speak to an Advisor

More Info

Delivery

Reviews

Refunds

More Info

4.4


8082 Reviews

Gold Trusted Service Award 2021

View as Feet & Inch
More Information
SKUISOCWS36
Lead Time2-5 Days
ManufacturerIsover

Overview of the Isover CWS 36 Glass Mineral Wool Cavity Wall Insulation Slab 

  • Specialised design – maintains high insulation levels in external masonry cavity walls 
  • Maintains a consistent performance – thermal conductivity of 0.036 W/mK 
  • Innovative design – made from highly effective glass mineral wool 
  • Minimal impact on the environment – zero ODP levels and low GWP levels 
  • For older and newer buildings – great for both refurbishments and brand-new builds 
  • Straightforward installation – simple handling, straightforward application 
  • Excellent fire performance – achieves an A1 Euroclass Fire Performance rating 
  • Designed to last – resistant to the damage caused by water vapour and mould 

Created for use in walls, this insulation slab has been crafted from glass mineral wool. Strong, durable and reliable, it has been designed to last and maintain excellent performance levels even in external masonry cavity walls. 

What Isover CWS 36 Made From? 

This product has been produced primarily using glass mineral wool. This type of wool not only performs well, but ensures that the structure of the slab itself retains high levels of strength, durability and flexibility throughout its lengthy lifespan. 

What Thicknesses and Sizes are Available? 

Thickness (mm) 

Length (mm) 

Width (mm) 

Quantity (slabs) 

Coverage (m2) 

50 

1200 

455 

20 

10.92 

75 

1200 

455 

16 

8.74 

85 

1200 

455 

12 

6.55 

100 

1200 

455 

12 

6.55 

 

Is Isover CWS 36 Resistant to M33oisture?  

One of the benefits of glass mineral wool is that the properties it possesses are extremely resistant to moisture damage. This is ideal for the its use in external masonry cavity walls where moisture may be more of a concern. 

What level of Thermal Conductivity Does This Insulation Offer? 

This slab has a thermal conductivity rating of 0.036 W/mK, and thanks to the high-quality materials used in its production, it can maintain this performance level throughout the year. The wool also absorbs noise, making it ideal for residential buildings. 

Is Isover CWS 36 Environmentally Friendly?  

This slab has been manufactured using up to 86% recycled glass, significantly reducing waste, size and design reduce the amount of onsite waste too. On top of this, the slab has achieved a remarkably Global Warming Potential level (less than 5) and also zero Ozone Depletion Potential levels (ODP). 

How Does This Insulation Perform When Exposed to Fire? 

The fire risks of a building product are always something to consider whether building a new property or renovating an older one, and this glass wool slab excels. As a non-combustible product it boasts an A1 rating in the Euroclass Fire Rating set of requirements – one of the highest grades available. 

Where Can Isover CWS 36 Be Used?  

This slab can be utilised in several different applications but is absolutely best-suited for use in cavity wools. Its durable design and exceptional thermal performance, along with its noise reduction levels, make it ideal for both new builds and renovations. 

Have a Question About the Isover CWS 36 Glass Mineral Wool Cavity Wall Insulation Slab? 

If you have any questions, whether it be about this product or others in our extensive range, please contact our dedicated customer service team on 01295 565 565 or use our online chat. We’ll help you pick the ideal solution for your project!  

 

Click Here to View All Insulation 

Technical Information

View as Feet & Inch
More Information
SKUISOCWS36
Lead Time2-5 Days
ManufacturerIsover

Brochures & Installation Guides

Delivery

We understand that ordering products online can be daunting, especially when ordering roofing materials. It is for this reason that we make our delivery processes as simple as possible for you. However, there are a few things to know about our delivery processes. These include:

  • When placing an order, you’ll see a breakdown of your delivery charge in your shopping cart. These charges are for the UK mainland only, and additional charges may apply for Northern Ireland, the Scottish Highlands and other regions.

  • Deliveries only take place on working days (Mon - Fri) and do not take place on Bank Holidays. 

  • You’ll find an estimated delivery on the majority of product pages below the 'Add to Basket' button. Whilst we aim to deliver your items within the estimated delivery, it is only an estimate. 

  • You're able to select a preferred delivery date in your shopping basket. Whilst we aim to deliver your items on this date, it is not guaranteed.
  • Orders placed after 12pm, during the weekend, and on a bank holiday will not be processed until the next working day. Please consider this when placing your order as it may impact your delivery date.

  • After you’ve placed your order, you’ll receive an order confirmation by email outlining the details of your order. Please check your order confirmation email and inform us of any mistakes or errors immediately.

  • Shortly after receiving your order confirmation you’ll receive a separate email confirming the planned delivery date.

  • We can only provide a delivery date and are not able to confirm the time delivery will be attempted. Therefore, we ask that somebody is able to accept and sign for your items throughout the started delivery date.

  • If you are unable to accept and sign for an order, it can be left in a safe location in most circumstances. Please email sales@roofingmegastore.co.uk if you would like an item to be left without a signature. 

  • Whilst we aim to hold the majority of our products in stock, due to the vast number of products we offer this is not always possible. Because of this we are required to send your items directly from the manufacturer on a small number of occasions, at which point a different delivery charge may apply as standard.  

  • On occasions the items ordered may be shipped from different depots, which could result in seperate deliveries taking place.

If you have more questions about our products or delivery, please contact our team online or by telephone.

Reviews

Reviews

Reviews

Reviews

Reviews

Reviews

Reviews

Refunds

We understand mistakes can be made and we therefore keep our cancellation and returns policy as simple as possible. However, there are a few things to know about cancelling an order or returning an item. These include:

Items Not Required

Should you no longer require an item, you have the right to cancel within 14 days of delivery unless the items are made to order. You needn’t give us reason for cancelling your order but will be required to notify us by email. Once notified we will provide an address for the items to be returned to and arrange the necessary refund.

Faulty or Damaged Items

On the rare occasion that an item is delivered faulty or damaged, we will exchange it or provide a refund. We must be notified by email within 48 hours and may require images. To avoid such an issue, we ask that customers do not sign for damaged goods.

Made to Order Items

A handful of items are ‘Made to Order’. This means they are typically manufactured to the specifications provided by you and are therefore non-refundable. This is unless they are deemed to be faulty or damaged at the time of delivery, at which point you should notify us by email within 48 hours of delivery.

Further Information

For further information on cancellations, returns and refunds please read our full policy by clicking here. This confirms any other requirements to consider (i.e. packaging), fees that may be charged (i.e. admin charges) and our policy for businesses.