Edge Insulation for Perimeter
Thermal Control
EXPOL's slab edge insulation solutions provide thermal protection where it matters most — along the perimeter of the concrete slab, where up to 10% of a building's heat loss can occur. Installing edge insulation supports warmer floor surfaces, contributes to a warm, dry and healthy indoor environment, and can reduce ongoing heating and cooling costs for the life of the building.
EXPOL offers both coated and uncoated edge insulation options, including ThermaSlab Edge and MAXEdge. ThermaSlab Edge is produced from durable XPS and is suitable for retrofit applications. MAXEdge is an engineered solution and is installed at the time of the concrete pour. Both materials are engineered to maintain long-term thermal performance, will not degrade over time, and provide reliable insulation value for the life of the structure.
EPS provides proven resistance to water ingress, making it a reliable solution for New Zealand ground conditions. Independent testing has shown that EPS retrieved after 30 years in the ground contained less than 1% water by volume, and even boards periodically submerged over the same period retained less than 4% — demonstrating long-term durability and material stability.
EXPOL edge insulation solutions are suitable for both residential and commercial projects and are supported with design and modelling tools to help integrate edge insulation into your wider floor solution.
Concrete Edge Insulation - Product Range
Click a product below to view full technical details and installation information
Installation & System Components
Ensure surfaces are clean and free from dust, oil and grease.
Step 1 - Ensure sand blinding / Gap7 is level allowing MAXEdge to sit flat.
Step 2 - Install DPM and formwork as per plans.
Step 3 - Install MAXEdge insulation and corners inside formwork. Here you can use MAXEdge pre-made corners or make them yourself – corner details to follow.
Step 4 - Install infill / EXPOL Tuff pods, cut around any penetrations as required.
Step 5 - Install reinforcing as per engineering plans.
Step 6 - Ensure inspections completed.
Step 7 - Pour concrete.
Step 8 - Remove formwork, paint MAXEdge if required.
External Corners
External corners are easy, they just butt into each other. We encourage expanding foam to be put in any joins and gaps around rebates.
Internal Corners
When joining internal corners cut the top the edge profile and butt the polystyrene together.
Key Benefits
Why choose EXPOL Concrete Edge Insulation for your project
Thermal Protection
Prevents up to 10% of building heat loss through slab edges
Moisture Resistance
Superior resistance to water ingress for long-term performance
Building Code Compliant
Meets new H1 Building Code standards for slab insulation
Easy Installation
Designed for both new construction and retrofit applications