Milbank GDeck thermally insulated concrete floor
Milbank GDeck is our latest innovation in thermally efficient, insulated flooring systems — combining high-performance expanded polystyrene (EPS) insulation with precision-engineered concrete components. With an integral structural top sheet, it reduces both installation time and on-site wastage, saving you time and money from the ground up.
A popular choice throughout the Construction industry
Milbank GDeck is fast becoming a trusted flooring solution across the UK construction sector. From national housebuilders to regional developers and self-build projects, Milbank GDeck is chosen for its speed, simplicity, and performance. Its versatility makes it suitable for a wide range of applications — including residential, commercial, and social housing developments.
Engineered to streamline site processes and meet modern efficiency standards, Milbank GDeck helps contractors reduce build times, cut costs, and achieve consistently high thermal performance. Backed by Milbank’s decades of precast concrete expertise, Milbank GDeck is becoming the go-to insulated flooring system.
Compliant with Building Regulations Part L
Milbank GDeck is fully compliant with the latest Part L Building Regulations, which mandate improved insulation and reduced carbon emissions in new buildings. Its high thermal efficiency and airtight detailing help meet both the Target Emission Rate (TER) and Fabric Energy Efficiency Standard (FEES) with ease – making GDeck the ideal foundation for compliant, low-energy homes.
Reducing your carbon emissions
Milbank GDeck actively contributes to lowering the carbon footprint of a building. The EPS insulation drastically reduces space heating demands by preventing heat loss through the ground. Additionally, the system reduces embodied carbon by minimising the need for multiple layers, materials, and transport-heavy components. The result is a sustainable, low-waste flooring system that supports your environmental and net-zero goals.
A popular choice throughout the Construction industry
Milbank GDeck is fast becoming a trusted flooring solution across the UK construction sector. From national housebuilders to regional developers and self-build projects, Milbank GDeck is chosen for its speed, simplicity, and performance. Its versatility makes it suitable for a wide range of applications — including residential, commercial, and social housing developments.
Engineered to streamline site processes and meet modern efficiency standards, Milbank GDeck helps contractors reduce build times, cut costs, and achieve consistently high thermal performance. Backed by Milbank’s decades of precast concrete expertise, Milbank GDeck is becoming the go-to insulated flooring system.
Compliant with Building Regulations Part L
Milbank GDeck is fully compliant with the latest Part L Building Regulations, which mandate improved insulation and reduced carbon emissions in new buildings. Its high thermal efficiency and airtight detailing help meet both the Target Emission Rate (TER) and Fabric Energy Efficiency Standard (FEES) with ease – making GDeck the ideal foundation for compliant, low-energy homes.
Reducing your carbon emissions
Milbank GDeck actively contributes to lowering the carbon footprint of a building. The EPS insulation drastically reduces space heating demands by preventing heat loss through the ground. Additionally, the system reduces embodied carbon by minimising the need for multiple layers, materials, and transport-heavy components. The result is a sustainable, low-waste flooring system that supports your environmental and net-zero goals.
Why choose Milbank GDeck over Block & Beam flooring?
While block and beam flooring has been a trusted method for years, Milbank GDeck represents a smarter, more efficient solution for modern builds. Milbank GDeck simplifies the process, reduces on-site complexity, and meets current energy performance goals with ease.
Based on an average floor size of 60m², our Milbank GDeck package (inclusive on delivery to site) would cost roughly 43/m² for the GT13 option. Opting for a standard Beam & Block floor (including a 100mm topsheet from a seperate supplier) would cost you roughly £64/m. In this example, choosing Milbank GDeck represents a total saving of over £1,260 0r 32%.
Product breakdown
Concrete Topping
The concrete topping provides the essential structural capacity, load distribution, and a suitable finished surface for the Milbank GDeck system.
Damp Proof Membrane
The damp proof membrane illustrated is for guidance only. It shall be specified from an external source and installed in accordance with the manufacturer’s instructions.
Structural Mesh (not included)
A structural mesh is laid in accordance with the concrete topping specification.
Closure Blocks
Closure blocks (provided as an optional extra if required) are used to finish the row of EPS insulation infill panels.
Prestressed Concrete Beam
Milbank Concrete products manufacture both 155mm and 225mm deep lightweight pre-stressed concrete beams, suitable for spans up to 6.5m.
Damp Proof Course
The damp proof course is rolled into place onto the base of the bearing wall before the concrete beams are laid to prevent the spreading of moisture from the ground.
EPS Insulation Module (Load-bearing Rail)
The EPS load-bearing rails are designed to sit on top of the pre-stressed concrete beams. They are interlocked to an infill panel and come as one unit. Separate load-bearing rails are required when you have multiple beams tight together.
Perimeter Strips
The perimeter strips are installed to line the edge of the floor solution, preventing any thermal bridging between the interior wall and the concrete topping.
EPS Insulation Module (Infill Panels)
The EPS panels are available in both 275mm and 545mm sizes and are designed to replace your standard concrete infill block.
How Milbank GDeck works
The system uses EPS (expanded polystyrene) infill panels that sit above the top level of concrete T beams. These panels include a built-in structural rail, forming a continuous layer of insulation across the floor. The EPS panels are supported by prestressed concrete T beams, similar to those used in traditional beam and block flooring systems. The structural rails that sit over the T beams add strength to the EPS panels and improve the overall stability and performance of the system.
Expanded polystyrene (EPS) is environmentally friendly.
Made from 98% air, no toxic substances are used in its manufacture, and it is 100% recyclable. For every 1 kilogram of oil used in the manufacture of EPS, 150 kilograms can be saved in heating oil over a fifty-year period.
The Benefits of Using Milbank GDeck Flooring
Milbank GDeck offers a wide range of benefits for housebuilders, developers, and contractors:
- Interrated Top Sheet – Speeds up installation and reduces labour costs
- Quick Installation – Lightweight EPS panels are easy to manoeuvre and slot into place
- Reduced Waste – Fewer materials, less handling, and less site waste
- Outstanding Insulation – High levels of thermal resistance built into the system
see next page for more…
The Benefits of Using Milbank GDeck Flooring continued…
- Compatible with Underfloor Heating – Ideal for modern heating strategies
- A Walkable Platform – lightweight but strong enough to walk on (and load out) without compromising structural integrity
- Sustainable – Lower embodied carbon, made from 15% recycled materials with recyclable components.
- Clean, Easy and Safe to Work with – EPS panels weigh just 2kg (approx)
- Industry Compliant – Milbank GDeck utilises components that are fully certified with an A+ green guide rating.
How Milbank GDeck works
The system uses EPS (expanded polystyrene) infill panels that sit above the top level of concrete T beams. These panels include a built-in structural rail, forming a continuous layer of insulation across the floor. The EPS panels are supported by prestressed concrete T beams, similar to those used in traditional beam and block flooring systems. The structural rails that sit over the T beams add strength to the EPS panels and improve the overall stability and performance of the system.
Expanded polystyrene (EPS) is environmentally friendly.
Made from 98% air, no toxic substances are used in its manufacture, and it is 100% recyclable. For every 1 kilogram of oil used in the manufacture of EPS, 150 kilograms can be saved in heating oil over a fifty-year period.
The Benefits of Using Milbank GDeck Flooring
Milbank GDeck offers a wide range of benefits for housebuilders, developers, and contractors:
- Interrated Top Sheet – Speeds up installation and reduces labour costs
- Quick Installation – Lightweight EPS panels are easy to manoeuvre and slot into place
- Reduced Waste – Fewer materials, less handling, and less site waste
- Outstanding Insulation – High levels of thermal resistance built into the system
see next page for more…
The Benefits of Using Milbank GDeck Flooring continued…
- Compatible with Underfloor Heating – Ideal for modern heating strategies
- A Walkable Platform – lightweight but strong enough to walk on (and load out) without compromising structural integrity
- Sustainable – Lower embodied carbon, made from 15% recycled materials with recyclable components.
- Clean, Easy and Safe to Work with – EPS panels weigh just 2kg (approx)
- Industry Compliant – Milbank GDeck utilises components that are fully certified with an A+ green guide rating.
What U-Values can you achieve? (W/m2K)
Milbank GDeck is engineered to deliver exceptional thermal performance, with U-values that can be tailored to meet or exceed current regulatory requirements. Depending on project needs and panel thickness:
- 0.18 W/m²K down to 0.09 W/m²K with increased EPS thickness
This makes GDeck ideal for new-build developments aiming for low energy use, improved SAP ratings, or Passivhaus-level thermal targets.
Insulated flooring advantages
Making the smarter choice
If the UK is to achieve Net Zero status, we must prioritise reducing carbon emissions from buildings significantly. And what better place to start than from the ground up.
The advantages of insulated floors are proven – with the potential to lose 10-20% of a buildings heat through an uninsulated floor, it’s essential you make sensible choices.
The Energy Saving Trust has estimated a saving between £40-£65 on energy bills through floor insulation, and in combination with other efforts around the home, the savings will add up
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A+ Green Guide rated, 100% recyclable and no waste created during manufacture. EPS has an ozone depletion potential (ODP) of zero and global warming potential (GWP) of less than 5.
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The use of EPS for thermal insulation in the construction industry leads to significant energy savings on heating and cooling buildings and a dramatic reduction in the emission of polluting gases. It, therefore, contributes to alleviating the greenhouse effect and acid rain.
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Expanded Polystyrene is one of the few building materials that can truly claim to be 100% recyclable. It can be reused in the manufacture of new EPS products, soil improvements and auxiliary compost material, as well as being added to other building materials. By fusion and granulation, it can be turned into simple products such as coat hangers and pens.
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No specialist skills or tools are required for installation – EPS panels are the same length as 5 traditional concrete blocks and are considerable lighter and easier to manage (~2kg).
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A wide range of EPS panel depths and grades are available to provide the most economical solution for developments whilst maintaining the highest levels of thermal properties.
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Plastic pegs push into the EPS panels and hold heating pipes in-situ, providing a quick and easy foundation for UFH installation.
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