ICF
Assemble forms
Reinforce
Pour & cure
ICF technology is faster
Why build
with ICF?
A solid structure. A comfortable home.
A faster way to build.
ICF combines reinforced concrete and continuous insulation for a strong, quiet home that stays comfortable year-round. Bringing both together can also speed up wall construction.
Main advantages of ICF technology
Comfort with less energy
Continuous insulation helps limit heat loss in winter and heat gain in summer, reducing the energy needed to keep your home comfortable.
A quieter home
The mass of the concrete wall helps reduce outside noise. Windows, doors and the rest of the building complete the acoustic design.
Strength at the core
Concrete and steel reinforcement form a solid, load-bearing structure, engineered for your home and its location.
Faster wall construction
Lightweight forms fit together and stay in place as insulation after the concrete is poured, reducing separate stages of wall construction.
Building technology comparison
Construction speed
ICF vs. blockwork.
Blockwork
Lay blocks
Prepare surfaces
Fit insulation
Prepare for finishes
Thermal insulation
Continuous insulation helps keep indoor temperatures steady through the seasons.
Sound insulation
The concrete core helps reduce noise passing through the walls.
Fire resistance
Concrete contributes to fire resistance; the rating depends on the complete tested wall assembly.
Seismic resistance
Reinforced concrete walls can be engineered for the seismic demands of the site.
Design flexibility
Build different shapes and layouts, with a choice of exterior finishes.
Lower running costs
Reduced heating and cooling demand can lower household energy bills.
Simple, fast assembly
Lightweight forms fit together and remain in place after the concrete pour.
Less site waste
Permanent formwork and planned concrete deliveries help reduce waste on site.
The work
From site to home
The blocks
EPS panels and connecting webs form the hollow blocks that make up an ICF wall.
Wall assembly
The blocks interlock to build the wall, leaving a cavity for reinforcement and concrete.
Concrete placement
Once the wall is reinforced and braced, concrete is pumped into the formwork.
The structural core
Concrete and steel form the load-bearing core. The EPS stays in place as insulation.
The house takes shape
The reinforced ICF walls define the home's layout as the structure rises on site.
Ready for finishing
With the shell enclosed, the walls and floor are prepared for the next finishing stage.
FAQ
What is ICF, and is it a modular house?
ICF means Insulated Concrete Forms. Its concrete walls are built on site to your design, giving you more freedom in shape and layout than ready-made room modules with fixed dimensions.
Can ICF suit an individual architectural design?
ICF can be used for different layouts and contemporary architectural designs. Openings, floor spans and the structural scheme need to be designed for the specific project. We review the possibilities with the project team.
Can I hang pictures, a TV or cabinets on an ICF wall?
Yes. ICF walls have built-in fixing points for attaching items. Heavy items can be anchored into the concrete core. The fixings are chosen to suit the wall system, the weight of the item and the type of bracket, especially for a TV on an extendable arm.
How are wiring and sockets installed in ICF walls?
Wiring and sockets fit into channels and recesses cut in the inner insulation after the concrete pour, before finishing. No concrete cutting is needed for ordinary wiring. Small pipes can fit too; larger ones need a separate route.
What protects the EPS insulation on the outside?
The insulation is covered by the exterior finish. For a rendered façade, a protective base coat with reinforcing mesh is applied first, followed by decorative render or a suitable final coating. These layers protect the insulation from sunlight, rain and everyday knocks.
Can an ICF home have a timber façade?
Yes. Timber cladding is fitted to a supporting frame, with an air gap behind it. This gap helps moisture drain away and allows the façade to dry, which is why it is called a ventilated façade. The frame fixings are chosen to suit the wall structure and the weight of the cladding.
How much faster is ICF than blockwork?
A rough proportional estimate for the walls of a 200 m² home: around 26 days with ICF versus 38 days with concrete blocks — about 33% less time. Actual timing depends on the wall area, design and crew.
What creates thermal and acoustic comfort?
The EPS layers help limit heat transfer, while the mass of the concrete contributes to sound reduction. Overall comfort also depends on windows, roof, ventilation, shading and construction details.