75mm Isover Cavity Wall Slab 36
Isover Cavity Wall Slabs (CWS) 36 is glass mineral wool slabs that are designed to be applied to improve wall insulation and thermal performance. The slabs provide thermal performance in external masonry cavity walls. The Isover Cavity Wall Slabs are available in sizes 1200mm by 455mm and come in a range of thicknesses from 50mm to 150mm. The slabs provide a thermal conductivity of 0.036W/mK. The cavity slabs are CFC and HCFC Free and offer Zero Ozone Depletion Potential and Zero Global Warming Potential.
The slabs come in compressed packaging and are lightweight. This makes delivering, handling, and storing easy, as well as cutting and installing. The slabs are extremely durable and will last as long as the building does if they are installed correctly. The flexibility of the slabs makes fitting the slabs into the cavity quick and simple.
- Helps to reduce heat loss within the building envelope and decrease energy costs
- Slabs can be tightly butted together, and the inner face will accommodate substrate irregularities to maximise the thermal performance
- 455mm wide slabs fit standard wall tie spacing for ease of installation
- Non-combustible – achieves Euroclass A1 Reaction to Fire classification
- Manufactured from up to 75% recycled glass
- Manufactured with a water repellent binder
- Leaves no airspaces
- Minimal flanking sound transmission along the wall cavity
- Ideal for full-filled applications in multi-storey construction
- Robust owing to fibrous faces
What is the difference between Cavity Walls Slabs 32, 34 and 36?
The Cavity wall slabs differ in thickness available, and the thermal conductivity provided. Different boards can be used depending on the thermal conductivity you require in your property and the thickness needed for your insulation needs. Each slab is named after the thermal conductivity provided for example, Cavity wall slab 36 provides a thermal conductivity of 0.036W/mK.
Cavity wall slab 36 is easy to cut if necessary and can be cut using a sharp knife. A mat or protective layer should be applied to the floor before cutting so the floor is not damaged. A ruler or plank can be used as a tool to hold the insulation slabs in place and provide a guide whilst cutting.
Cavity wall insulation will save you money on your energy bills by preventing heat from escaping through the walls. It keeps your property cooler in the summer and warmer in the winter. A more temperature-controlled environment means more comfortable living or working conditions. It also means lower monthly energy bills and making your residential building more energy efficient. By reducing the heat escaping the property you are contributing towards climate change and the reduction of global warming.
When installing cavity wall insulation remember to take the building’s fixtures and fitting into consideration as it can increase or decrease the wall depth. This can affect factors such as the space in the room. Also take safety measures to ensure insulation is fitted correctly around electrical sockets, wires and ventilation spaces, or the correct procedures are put into place to remove these components. Always consult a building professional when insulating your walls to prevent the wrong insulation being installed and the possibility of damaging your property.
The Cavity Walls Slab 36 can be applied to application including:
- Partial fill masonry cavity wall insulation
- Full fill masonry cavity wall insulation
Safety / Product Specifications:
Thicknesses: 75mm, 100mm, 125mm, 150mm
Thermal Conductivity: 0.036W/mK
Material: Glass Mineral Wool
Reaction to Fire: Euroclass A1 Reaction to Fire classification according to EN 13501-1
BBA Approved certificate 18/5560
Achieves an A+ generic rating within the BRE Global Green Guide
How are Cavity Wall Slabs installed?
Cavity walls slabs are installed in between two masonry walls.
The insulation should be applied whilst the relevant wall is being built. One side of the masonry wall should be constructed with timber joists in place, ready for the cavity slabs to be fitted each space.
Each cavity within the wall should be measured. The cavity slabs should then be measured and cut to fit into each individual cavity as some cavities can differ in size.
The thickness of the slabs should match the depth of the wall. The slab should then be firmly pushed into the cavity to ensure each edge of the slab is securely in place however, the slabs should not be flattened when being installed as this can affect the thermal performance of the product.
Once the slabs are in place plasterboard can then be applied to the timber joists in the wall using the necessary fixings.
The wall can then be plastered and can then be completed with a decorative finish.
Note, protective gear is recommended when installing wall insulation as the product can produce particles that can irritate the skins and eyes and can be harmful when inhaled.
Eye goggles, gloves, face masks, and protective clothing should be applied when cutting or fitting cavity slabs.