We use cookies to provide you with a better experience. By continuing to use this site, you agree to our use of cookies.
I agree

Concrete floor insulation: Cost, types & full guide

What is concrete floor insulation?

concrete floor insulation

Concrete floor insulation involves adding a thermal barrier above or below a solid concrete slab to prevent heat loss and improve indoor comfort. Because concrete is dense and highly conductive, it can quickly absorb and lose heat, making uninsulated floors feel cold underfoot and driving up energy bills.

Why concrete floors lose heat

Concrete has a high thermal mass, meaning it absorbs and transfers heat easily. In winter, heat escapes through the slab into the ground, while in summer, the slab can hold unwanted warmth. Without insulation, up to 15% of a home’s heat can be lost through the floor, significantly impacting your EPC rating and overall energy efficiency.

Benefits of concrete floor insulation

Thermal efficiency and reduced energy bills

By adding insulation, heat loss through the slab is minimised, cutting energy bills and reducing household carbon emissions. This is especially valuable for homeowners aiming to improve EPC ratings or meet UK retrofit standards.

Improved comfort in winter and summer

Insulated concrete floors remain warmer underfoot in winter and cooler in summer, creating a more consistent and comfortable indoor climate.

Noise reduction and acoustic benefits

Concrete floor insulation can also dampen airborne and impact noise, which is beneficial in flats, conversions, or multi-storey homes.

Protection against damp and moisture

Properly installed insulation creates a barrier that prevents condensation and damp from penetrating the living space. Not only does this help conserve heat, but it also protects flooring finishes and indoor air quality.

Types of concrete floor insulation

Rigid insulation boards

Rigid boards are the most common choice, but there are several different types to choose from:

  • PIR (polyisocyanurate) boards: excellent thermal resistance, thin but highly effective.
  • XPS (extruded polystyrene) boards: durable, moisture-resistant, ideal for basements.
  • EPS (expanded polystyrene) boards: cost-effective, lightweight, suitable for large areas.

Concrete floor insulation rolls

Mineral wool or fibreglass rolls can be installed above concrete slabs under floating floors. They provide thermal and acoustic benefits but usually require a vapour control layer to avoid damp.

Foil-backed and reflective insulation

Foil-backed layers are often combined with underfloor heating systems. They reflect heat upward into the room, improving efficiency.

Eco-friendly and sustainable options

Sheep’s wool, hemp, and recycled fibre boards are sustainable alternatives, offering good thermal performance and a lower carbon footprint.

Concrete floor insulation for different applications

New build concrete floors

In new builds, insulation is typically laid over the slab before screed or flooring is added, ensuring compliance with UK building regulations (Part L).

Existing concrete floors (retrofit insulation)

For retrofits, insulation is usually installed on top of the slab as a “floating floor” system. This may raise floor levels slightly but avoids major structural work.

Concrete floors with underfloor heating

Insulation beneath underfloor heating ensures heat is directed upwards, maximising system efficiency and reducing wasted energy.

Basement and ground-level insulation

Basements are prone to damp and heat loss. XPS boards are particularly suited for below-ground use due to their high moisture resistance.

Concrete floor insulation vs other insulation methods

Concrete floor insulation vs suspended floor insulation

  • Concrete floors require rigid or surface insulation.
  • Suspended timber floors use mineral wool or rolls between joists.
  • Concrete insulation tends to be more durable but also more disruptive to install.

Concrete floor insulation vs underlay

Standard underlay provides minimal thermal benefit compared to proper insulation. Insulation rolls or boards should always be prioritised for energy efficiency.

Rigid boards vs rolls

Rigid boards generally outperform rolls for concrete floors due to their compressive strength, making them suitable under screed, tiles, or laminate.

How to install concrete floor insulation

Tools and materials required

  • Rigid boards or rolls.
  • Vapour control layer (if needed).
  • Adhesives or fixing systems.
  • Cutting tools, tape, PPE.

Step-by-step installation guide

  1. Clean and level the existing slab.
  2. Lay a damp-proof membrane (DPM).
  3. Fit insulation boards or rolls.
  4. Install a vapour barrier if required.
  5. Add screed or floating floor finish.

DIY vs professional installation

DIY may be possible for small areas, but professional installation is recommended for retrofits, basements, or homes with underfloor heating to ensure compliance and avoid damp issues.

Cost of concrete floor insulation

Average price per m²

Concrete floor insulation with professional installation typically costs £35–£90 per m², depending on the material (EPS being the cheapest, PIR being the most expensive). With the higher cost particularly for retrofits requiring floor levelling or new screed.

Long-term savings and payback period

Energy savings can amount to £150–£300 annually, meaning insulation often pays for itself within five to 10 years, alongside increasing property value and EPC performance.

Best materials for concrete floor insulation

PIR boards

Excellent thermal efficiency with thin layers, ideal for homes with limited headroom.

XPS boards

Moisture-resistant and strong, best for basements and ground-level slabs.

Mineral wool rolls

Good for floating floors where acoustic insulation is also required.

Composite insulation solutions

Combine rigid boards with reflective foils for maximum thermal and moisture protection.

Where to buy concrete floor insulations

When buying concrete floor insulations, you’ll usually compare three types of suppliers: DIY retailers, specialist insulation stores, and professional installers. Each option has different benefits depending on whether you’re a homeowner tackling a small project or a property developer managing large-scale installations.

Supplier Type Example Retailers Best For Pros Cons
DIY & General Retailers B&Q, Wickes, Screwfix Small home projects, DIYers Easy to access, affordable, wide range of basic PIR/XPS/EPS boards Limited technical advice, not always best for large projects
Specialist Insulation Suppliers Insulation Superstore, Online Insulation Contractors, architects, developers Wide product range (including eco-friendly options), technical datasheets, and bulk discounts Delivery costs can add up, and may require trade accounts
Professional Installers Eco Insulation (recommended) Homeowners wanting hassle-free installation Supply + install, advice on building regs, EPC improvements, warranties Higher upfront cost compared to a DIY purchase

Which option should you choose?

  • Homeowners on a budget: Consider DIY boards from B&Q or Wickes if you’re confident in installing yourself.
  • Builders or contractors: Go through specialist suppliers to access bulk deals and technical support.
  • Property owners upgrading EPC ratings: A professional installer like Eco Insulation ensures the job is compliant, high-quality, and optimised for long-term energy savings.

Is a concrete floor insulation worth it?

Whether for a retrofit or new build, concrete floor insulation reduces energy bills, improves comfort, and enhances EPC ratings. With options ranging from cost-effective EPS boards to sustainable eco-products, it offers strong long-term value and contributes to a warmer, healthier, and more energy-efficient home.

Get in touch with Eco Insulation to learn more, receive a quote, and book your installation today. 

Soundproof floor insulation: Acoustic flooring overview

What is soundproof floor insulation?

Soundproof floor insulation is a type of flooring solution designed to reduce unwanted noise between rooms or levels in a building. It involves installing specialised acoustic materials beneath the floor surface to limit both airborne and impact noise.

How it reduces noise transfer between floors

It works by creating a barrier that absorbs and dampens sound vibrations. This barrier prevents sound waves from travelling easily through the floor structure, making conversations, music, footsteps or other sounds less noticeable in the rooms below.

Benefits of soundproof floor insulation

Reduces airborne noise

One of the main benefits of soundproof floor insulation is that it cuts down airborne sounds such as talking, television, or music. This makes shared living spaces far more comfortable.

Blocks impact noise

It also helps reduce impact noise created by footsteps, moving furniture, or dropping objects. These sounds travel directly through floorboards, and insulation works to absorb and minimise them.

Improves comfort and privacy in multi-storey homes

By reducing both airborne and impact noise, soundproof insulation improves comfort and privacy in multi-storey homes. This is particularly valuable in flats, apartments, and shared houses where everyday noise can easily become intrusive.

Types of soundproof floor insulation

Acoustic floor insulation rolls

Insulation rolls, often made from mineral wool, are flexible and fit easily between floor joists. They provide effective acoustic absorption and are popular in both domestic and commercial properties.

Rigid soundproof insulation boards

Boards are denser than rolls and create a solid sound-blocking layer. They’re ideal for floating floor systems or when upgrading solid concrete floors.

Floating floor soundproof systems

Floating systems use a combination of insulation, resilient layers, and a new floor surface. This system isolates the floor from the structure beneath, reducing both airborne and impact noise transfer.

Eco-friendly and sustainable soundproof insulation options

Eco-friendly options include insulation made from recycled fibres, sheep’s wool, or cork. These materials reduce noise effectively while also offering a sustainable choice for environmentally conscious homeowners.

Soundproof floor insulation for different applications

Apartments and flats

In flats, soundproof floor insulation is essential for reducing neighbour noise from above or below. It helps meet building regulations and ensures greater peace of mind.

Multi-storey houses

In multi-storey homes, insulation between floors keeps bedrooms quieter and creates a calmer living environment for all household members.

Commercial buildings and offices

In offices, soundproofing is important for productivity. Floor insulation prevents background noises from disturbing meetings or workstations below.

Home studios and media rooms

For studios and media rooms, acoustic floor insulation is a vital installation. It enhances sound quality in the space while preventing noise from disturbing the rest of the property.

Soundproof floor insulation vs other noise reduction methods

Soundproof floor insulation vs underlay

While underlay can reduce some impact noise, it isn’t as effective as proper soundproof insulation. Insulation is thicker, denser, and designed specifically to block both airborne and impact sounds.

Rolls vs boards: which works better?

Rolls are best for between-joist insulation, while boards offer better performance on solid floors or floating systems. The choice depends on the type of floor construction and the level of soundproofing needed.

Soundproof insulation vs carpet-only solutions

Carpets can soften impact noise but won’t stop airborne sounds like voices or music. Soundproof floor insulation works much more effectively in combination with carpets or rugs.

How to install soundproof floor insulation

Tools and materials required

Basic tools and equipment include a utility knife, a tape measure, safety gear, and the insulation itself. For boards or floating systems, you may also need adhesive, screws, and floor levelling materials.

Step-by-step installation guide

  1. Lift floorboards or prepare the subfloor.
  2. Measure and cut insulation rolls or boards to fit.
  3. Place insulation securely between joists or over the existing floor.
  4. Add a resilient layer if using a floating floor system.
  5. Refit floorboards or install new flooring.

DIY vs professional installation

While some homeowners attempt DIY installation, professional installers ensure the insulation is fitted correctly, meets building regulations, and achieves maximum noise reduction.

Best materials for soundproof floor insulation

Mineral wool

Mineral wool is one of the most common choices. It’s dense, fire-resistant, and excellent at absorbing sound waves.

Acoustic foam boards

Foam boards are lightweight but effective at blocking airborne noise. They’re often used in modern acoustic systems.

Composite and layered systems

These combine multiple materials, such as foam, rubber, and mineral fibres, for superior soundproofing results.

Cost of soundproof floor insulation

Average price per m²

The cost of materials typically ranges from £10 to £40 per m², depending on the type and thickness of insulation.

Installation costs

Professional installation adds labour costs, usually around £200 to £600 for a medium-sized room, though prices vary by region and property type.

Long-term value of noise reduction

While the upfront cost can seem high, the long-term value includes improved comfort, privacy, and even increased property appeal.

Where to buy soundproof floor insulation

Online retailers and hardware stores

Most DIY stores and specialist online retailers stock a wide range of acoustic flooring products, including rolls, boards, and floating floor kits.

Best-value brands and suppliers

It’s worth comparing well-known insulation brands for performance and cost. Look for suppliers with proven acoustic test results and sustainable product ranges.

Soundproof floor overview

Soundproof floor insulation is one of the most effective ways to reduce noise in homes, flats, and commercial buildings. By choosing the right system and materials, you can make your property quieter, more comfortable, and more private.

Thinking about upgrading your floors with soundproof insulation? Visit Eco Insulation to connect with expert installers and find the best solution for your property.