What is best insulation for floor?

Polystyrene Insulation is the best to insulate the floor. Both expanded polystyrene boards and extruded polystyrene boards have superior thermal efficiency and extremely high compressive strength making them ideal for all types of floor insulation. However, you can also use PIR insulation, mineral wool insulation batts and underfloor heating to insulate floors.

How much floor insulation do I need?

The amount of floor insulation you need will depend on your pre-existing floor insulation and the area you have to cover. For more information, please refer to our blog.

How does floor insulation work?

Similar to wall or roof insulation, floor insulation materials act as a barrier and prevent the transfer of heat through the floor. Open cell insulation like RWA45 or Rocksilk RS45, trap the heat within their fabric, while closed cell insulation like PIR insulation or polystyrene insulation restricts the transfer of heat through their many tiny air bubbles.

How much does floor insulation help?

Floor Insulation helps by restricting the movement of conditioned air through the floor. When installed properly floor insulation saves nearly 10% on energy bills.

What insulation between floor joists?

In between floor joists, you can use fibreglass insulation rolls or Insulation batts like Rockwool RWA45 or Knauf rocksilk RS45.

How to insulate floor in crawl space?

You can use rigid insulation boards like PIR Insulation or extruded polystyrene to insulate floor in crawl spaces.

What is the cheapest way to insulate a floor?

The cheapest way to insulate floors is to use expanded polystyrene or fibreglass insulation rolls.

Is insulation in the floor worth it?

Yes, floor insulation is definitely worth it. Properly installed floor insulation ca will you save nearly % on energy bills.

What floor insulation do I need?

There are many floor insulation materials available today. You can choose the floor insulation depending on the type of floor you have. There is polystyrene insulation, that works on all kinds of floors. You can also use PIR insulation, fibreglass insulation rolls and mineral wool insulation batts to insulate floors. Underfloor heating is also an option worth considering.

What types of floors need insulation under them?

Suspended floors, concrete, flooring of buildings located in colder regions, hardwood, tile flooring etc will likely need insulation under them While floor insulation saves energy, not all flooring needs insulation under them. One must note the factors like the type of flooring to be used, the type of foundation the floor is built on, and the climate in which the building is located before deciding on floor insulation

What types of insulation flooring can you use?

Some common floor insulating materials include fibreglass, polystyrene PIR, mineral wool and spray foam

How much can I save if I install underfloor insulation?

Roughly one could save £110-£275 per year on energy bills with properly installed floor insulation. However, this will depend on factors like the type and thickness of the floor insulating material you choose, the size of your home and your current energy usage and costs.

How much does Floor Insulation Cost?

The cost of insulating your floor depends on many factors the insulation material, type of flooring, your building location and others The cost of insulating a suspending floor is roughly around £1500 to £3000. It would work out to be cheaper if you use fibreglass rolls or mineral wool batts. Underfloor heating, however, might be dearer, but it is known to give a lasting and better thermal performance.

What is best for floor insulation?

EPS sheets or expanded polystyrene insulation is best used to insulate floors. However, other insulating materials like XPS boards, mineral wool batts and PIR insulation can also be used for floor insulation

Is it worth insulating under floorboards in the UK?

Yes, By insulating under the floorboards on the ground floor one can save up to £110-£180 on energy bills. Plus it improves the comfort level indoors.

Is it worth it to put insulation between floors?

Technically it is sufficient o insulate ground floors unless the floor is above unheated areas like garages etc. However, with the recent exponential rise in energy bills, insulating every part of your home or building including mid-floor insulation is definitely worth it. It saves energy and adds to comfort level in a building

What is the best insulation for under a wooden floor?

Fibrous insulation like wood fibre, mineral wool insulation or even sheep wool works best between timber joists. These insulating materials are usually supplied as rolls or semi-rigid batts and they effectively cut down air movements thus optimising thermal insulation in floors.

How do you insulate under existing floor?

To insulate existing floors you will have to lift the floorboards and first check if there is any existing insulation and its conditions. Also, keep an eye out for moulds or dampness. Once you have checked these, you can insulate existing floors using minerla wool insulation batts or PIR.

Floor Insulation

Floor insulation is a vital solution for enhancing energy efficiency and reducing heat loss in UK homes and commercial buildings. By insulating ground floors, suspended timber floors, and concrete floors, you can create a warmer, more comfortable environment while lowering energy bills. Proper floor insulation helps prevent cold air from rising through floorboards and joists, ensuring compliance with building regulations and boosting overall thermal performance.

Our range of floor insulation boards and fibre solutions, including leading brands like Kingspan, are designed for various applications and floor types. Whether you're insulating a wooden floor over a suspended floor or upgrading an unheated space, we offer products in multiple thickness levels to suit your project. Mineral wool and rigid boards provide excellent thermal properties to effectively reduce heat loss.

Explore our selection of floor insulation materials to find the ideal solution for your property. With fast UK delivery and top-quality products, you can easily insulate your home and achieve greater energy savings.

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A Complete Guide to Floor Insulation in the UK

Floor insulation is a key component in improving energy efficiency, reducing heat loss, and lowering energy bills for homes across the UK. Properly insulating floors can create a warmer, more comfortable living environment and help meet building regulations. Whether insulating a solid floor or suspended wooden floor, the right insulation materials can make a significant difference.

Why Insulate Your Floor?

Reduce Heat Loss – Insulation beneath floors prevents heat from escaping, contributing to better overall thermal performance.
Lower Energy Bills – By reducing heat loss, less energy is needed to keep your home warm.
Enhanced Comfort – Insulated floors feel warmer underfoot, reducing the need for additional rugs and carpets.
Compliance with Building Regulations – Proper insulation helps ensure your home meets UK standards for energy efficiency.

Types of Floor Insulation Materials

PIR Insulation Board – Celotex and similar products provide high-performance insulation with low thermal conductivity.
Foam Insulation – Lightweight and easy to install, rigid foam insulation is suitable for both solid floors and suspended wooden floors.
Mineral Wool Insulation – Flexible and effective for sound and thermal insulation.
Multifoil Insulation – YBS SuperQuilt Insulation is a reflective solution that can be used in underfloor insulation applications.

Floor Types and Insulation Solutions

Solid Floors – Insulate by laying PIR insulation boards or foam insulation beneath floorboards or concrete slabs. This adds a thermal barrier that prevents heat escape.
Suspended Wooden Floors – Insulation can be placed between floor joists with netting or vapor barriers to prevent draughts.
Upper Floors – Although less common, insulating upper floors can reduce heat transfer between levels.

How to Insulate Your Floor

Prepare the Area – Clear the floor space and check for any air bricks or gaps that need sealing.
Choose the Right Insulation – Select the appropriate insulation material for your type of floor.
Fit the Insulation – Lay rigid foam or multifoil insulation beneath floorboards, ensuring no gaps are left.
Seal and Finish – Install skirting boards and finish with carpet or floor panels.
Check Building Regulations – Ensure the installation complies with local building control office requirements.

Benefits of Floor Insulation

Energy Savings – Proper insulation can lower your energy bills significantly.
Comfort – Insulation prevents cold air from seeping through floors, keeping your home warm and comfortable.
Environmental Impact – Reducing energy use lowers your carbon footprint.

Conclusion

Floor insulation is an effective way to reduce heat loss and make your home warmer while lowering energy bills. By using the right materials and ensuring compliance with building regulations, you can enhance the comfort and energy efficiency of your home.

Insulate your floor today to enjoy the long-term benefits of an energy-efficient, cosy living environment.