Thermal Insulation
Create energy-efficient homes and buildings with thermal insulation
Thermal insulation is a core component of a building’s construction and can be found in the roof, floor, ceiling and wall elements. Mineral wool thermal insulation (also known as glass wool or stone wool) is thermal insulation that comes in many forms, including rolls, batts, pipe sections and slabs.
Mineral wool thermal insulation benefits at a glance:
- Thermal efficiency
- Energy efficiency
- Able to meet U-value requirements on a variety of projects
- Enhance indoor comfort
The benefits of thermal insulation
Depending on your needs, mineral wool can help reduce heat loss in cavity walls, lofts, partitions, ducts and pipes. Let’s look at the core elements.
Thermal insulation can help to reduce heat loss in the winter and heat gain in the summer, which can lead to less energy being needed to sustain the desired temperature. Mineral wool insulation does this by slowing heat loss transfer.
Using thermal insulation helps designers, builders and contractors to meet thermal performance or U‑value requirements in building regulation or certification systems. To help you calculate yours, you can use the Isover U-Value calculator here.
Using thermal insulation can help you achieve a more consistent temperature . Isover UK products have met the standard to be accredited to Eurofins Indoor Air Comfort® Gold Certification - the highest accreditation for indoor air quality.
Learn more about thermal insulation
Get to know thermal insulation better with these articles written by our development teams and insulation specialists.
Discover how a fabric-first approach cuts building energy using insulation
Uncover how mineral wool insulation cuts heat loss, energy costs and supports safety
Isover thermal insulation products
We offer mineral wool insulation for many applications, from external walls and facades to loft insulation and internal partitions. Once installed, it can help to create a more consistent temperature in the internal environment, whilst also contributing to its acoustic performance.
Isover Polterm Max Plus
Non-combustible thermal and acoustic insulation for ventilated rainscreen cladding and overcladding systems
Isover Steel Frame Infill Batt
Thermal insulation for lightweight steel frame walls
Isover Cavity Wall Slab (CWS) 32
Thermal Insulation for External Masonry Cavity Walls
Isover Cavity Wall Slab (CWS) 34
Thermal Insulation for External Masonry Cavity Walls
Isover Cavity Wall Slab (CWS) 36
Thermal Insulation for External Masonry Cavity Walls
Frequently Asked Questions
I have severe allergies, and my contractor is installing Isover. What’s in the product?
We are unable to provide specific case advice – however, please refer to our Safe Use Instruction Sheet (SUIS), a link to which you’ll find below. Our product contains less than 1% mineral oil, which is added to reduce dusting of the glass mineral wool.
For more details, please read are SUIS Sheet here
Does your insulation contain palm oil?
No. Isover insulation does not contain palm oil.
Is Isover packaging recyclable?
Yes. In 2025, we also reduced the ink coverage in our white packaging to less than 15%. This reduction means our packaging can now be used to produce a wider variety of items made of recycled content than previously. This is because using a higher proportion of white plastic makes it more versatile. Our packaging also contains 30% Post Consumer Recycled content, which means less raw virgin materials go into our packaging and further strengthens our commitment to sustainability.
Do you recycle leftover insulation?
Isover doesn’t currently offer a customer recycling service. If you do need to dispose of leftover insulation, residues or by-products, this should comply with the requirements of environmental and waste disposal legislation and any local authority rules.