Floor Insulation

(48 products)

Buy the best floor insulation boards and slabs to suit various floor types. Whether you are insulating concrete floors, timber floors, or underfloor heating systems, selecting the right material is essential for reducing heat loss and ensuring long-term energy savings.

We supply and deliver top PIR brands like Kingspan and Celotex, EPS (Expanded Polystyrene) for domestic and industrial floor applications, and XPS (Extruded Polystyrene) for ground floors and basements.

Why Is Floor Insulation Important?

Floor insulation is a simple yet effective way to reduce heat loss from your home, ensuring that warmth stays inside during the cold months and cool air is preserved during the summer. A well-insulated floor prevents drafts, reduces heating costs, and creates a more comfortable living environment.

Did you know that up to 20% of your home’s heat can escape through uninsulated floors? Installing the right floor insulation can help you save money on energy bills, reduce your carbon footprint, and make your home feel warmer and cozier.

Benefits of Floor Insulation

Insulating your floor offers a variety of benefits:

Improved Energy Efficiency: Insulating your floor helps reduce heat loss, making your home more energy-efficient and lowering heating costs.
Enhanced Comfort: By preventing heat from escaping, floor insulation keeps your rooms warmer during the winter, ensuring a comfortable living space.
Reduced Noise: Insulating floors can help reduce sound transmission between rooms, making your home quieter.
Increased Property Value: Homes with effective insulation are more appealing to buyers, as they offer lower energy bills and better overall comfort.

Find the Perfect Insulation for Your Floor Type

Choosing the right floor insulation depends on the type of floor you have. We’ve got options for all types of floors, whether solid concrete, timber, or suspended timber.

Concrete Floors

For solid concrete floors, rigid PIR insulation boards like Kingspan, Celotex, and Recticel are the best option.They are installed directly above the concrete slab, providing an effective thermal barrier.

Below the concrete slab EPS (Jablite) or XPS boards (Kingspan Greenguard) are commonly used as they are moisture-resistant and load-bearing.

Timber Floors (Including Suspended Floors):

Timber floors can be insulated by lifting the floorboards and placing insulation between the joists. Mineral wool insulation like Rockwool, Knauf, and Isover or PIR boards are ideal for this type of flooring, and they prevent heat loss by filling the gaps between the joists.

Whether your timber floor is suspended (with air gaps beneath) or solid, the insulation methods are similar, but suspended floors need careful attention to airflow and moisture prevention.

How Much Money Can You Save with Floor Insulation?

Insulating your floor is an investment that pays off quickly. By reducing heat loss, you’ll need less energy to maintain a comfortable temperature in your home, lowering your heating bills.

Potential Savings:

In Great Britain, insulating your ground floor could save you up to £70 a year. For larger homes (such as detached houses), savings could be as high as £155 a year.

The best part? You’ll begin to see a return on your investment in as little as 2 years. Start reducing your energy costs today by choosing the right insulation.

DIY Floor Insulation

If you want to save on installation costs, many of our products are easy to install yourself.

DIY Installation Tips:

Check the Floor Type – Identify whether you have concrete, timber, or suspended floors to select the right insulation.
Lift the Floorboards – If you're insulating timber floors, carefully lift the floorboards to access the joists.
Measure and Cut Insulation – Cut your insulation material to fit between the joists. For concrete floors, ensure the boards are cut to size for a snug fit.
Seal Gaps – Make sure there are no gaps around the edges of your insulation. Seal the gaps between the floorboards and around the perimeter with sealant.

Find the Right Floor Insulation for Your Home

Need Help Choosing?

If you’re not sure which insulation is best for your home, our team of experts is here to help. Contact us today to get personalised advice on the best insulation products for your floor type and needs.

How to Insulate a Floor

Follow this step-by-step guide to properly install floor insulation based on your floor type.

Read mORE

Frequently Asked Questions

What is the best insulation for floors?

The best insulation material for floors depends on your floor type. Rigid foam boards are excellent for concrete floors, while mineral wool works well for timber floors. Kingspan is a top choice for high-performance insulation.

Can I install underfloor insulation myself?

Yes, underfloor insulation can be a DIY project, especially if you're working with suspended timber floors or solid floors with accessible joists. For larger projects, you might want to consult a professional.

How do you insulate a floor for winter?

For winter, you can insulate by adding insulation boards, foam underlay, or mineral wool between floor joists. Be sure to use materials that provide adequate thermal resistance to keep the warmth in and the cold out.

Does underfloor insulation cause damp?

Underfloor insulation can cause damp if not installed correctly. A moisture barrier should be used, particularly with concrete floors, to prevent moisture from being trapped underneath the insulation.

How much heat is lost through the floor?

Around 10% of a home’s heat can be lost through an uninsulated floor, especially in ground-floor rooms. Insulating the floor can help reduce this loss and keep your home warmer.

Is it worth putting insulation under floorboards?

Yes, it is worth putting insulation under floorboards. Insulating under floorboards helps prevent heat loss, keeping your home warmer and more energy-efficient. It can also reduce drafts, lower heating costs, and improve overall comfort in colder months.

Is it a good idea to put insulation between floors?

Yes, it is a good idea to put insulation between floors, especially in multi-storey homes or flats. This improves thermal efficiency, helps maintain a consistent temperature between levels, and reduces noise transmission, creating a more comfortable and quieter living environment.

How do you insulate a cold floor?

To insulate a cold floor, you can install insulation materials like foam boards, mineral wool, or reflective underlay beneath the flooring. In concrete floors, you might need to use rigid boards with a moisture barrier. For suspended floors, fitting mineral wool or PIR boards between joists can effectively reduce heat loss and make the floor warmer.

Can you use Celotex as floor insulation?

Yes, you can use Celotex PIR for insulating your floor.

Can you use Kingspan for floor insulation?

Yes, Kingspan insulation is ideal for floors, providing excellent thermal performance with a slim profile, especially in areas where floor space is limited.

is 100mm thickness insulation enough for my floor?

100mm thickness of floor insulation is generally sufficient, but thicker insulation (120mm to 150mm) may be required in some areas to meet modern building regulations and improve energy efficiency. Check local building codes or consult a professional to confirm the right thickness for your situation.

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