Please note, there may be extended lead times on Isover products due to manufacturing issues. Please enquire for availability.
Isover CWS36 Cavity Wall System Insulation
Need to discusss your enquiry further? Please contact our customer services team on 0330 123 1761, who will be happy to help.
ISOVER CWS36 is designed to be installed during construction in the cavity between two masonry leaves in external walls. The product is a non-combustible, silicone-impregnated glass mineral wool slab.
The thermal conductivity (Lambda value) of ISOVER CWS is 0.036 W/mK.
Dimensions are compatible with conventional wall tie spacing.
ISOVER CWS36 is composed of high quality glass wool, which is bonded with a synthetic, thermo-setting resin, silicone impregnated, to form a strong yet resilient insulating slab, which is easy to handle, cut and install.
- BBA Certified
- Can be used in multi-storey construction
- Completely fire safe
- Euroclass A1 fire rating
- Long product life, will not age
- Long installed life, will tolerate structural movement and settlement
- Fibrous faces will follow wall contours leaving no airspaces, leaving no penetrating air gaps
- Does not hinder the natural drying out process of the building
Orders and Delivery
Free delivery if your order is over £300 Inc VAT. Orders under £300 are subject to a £30.00 Inc VAT delivery charge.
When ordering on line you can specify the date of delivery, however we would not be able to specify the time of delivery on that day.
♦ Please note that we have a number of large vehicles, including articulated vehicles that may be used for delivery. Please advise us in the comments on your order if access to the delivery address is limited.
♦ Due to insurance guidelines, delivery personnel are unable to enter private residences. Delivery will be as far as possible to the kerbside of the delivery address. The recipient of the products is responsible for any additional lifting once the delivery has been made. Please bear in mind that Insulation products can be bulky and / or heavy.
♦ The delivery driver will require a signature to confirm the goods have been received.
† Unfortunately we, Insulation Express, cannot deliver to the Highlands & Islands of the UK. However we will be happy to deliver to a freight forwarding company on your behalf.
Returns and Refunds
In the unlikely event that you need to return an item, please contact our team on 0330 123 1885 within 14 days of accepting delivery of the item. Restocking charges may apply. We will discuss this with you upon receipt of the cancellation request. Restocking charges will be applied where the products are no longer required AND NOT for goods returned because either defective or damaged. We usually charge 25% of value (minimum £25.00).
Please note that we cannot accept returns on special orders. Special orders may consist of items sent via third party shipping companies or made to measure products. If you are unsure on whether or not your item is a special order, please contact us on 0330 123 1885 prior to placing the order.