Spring Into Action: Insulate Your Concrete Slab

Spring Is Building Season

As the weather warms up, it’s the ideal time to start your next building project. Before the concrete is poured, it’s essential to think about what’s beneath it. A well-insulated concrete slab is the foundation of a comfortable, energy-efficient home — not just in winter, but throughout the hot New Zealand summer too.

Why Insulate a Concrete Slab?

Up to 10 percent of a building’s heat can be lost through an uninsulated slab. Under-slab insulation creates a thermal barrier that helps regulate indoor temperatures and reduces heating and cooling costs.

Many people think of insulation only as something that keeps a house warm, but it also prevents heat from entering during summer. With an insulated foundation, your home stays cooler naturally — meaning less reliance on air-conditioning and more consistent comfort all year round.

EXPOL Foundation Insulation Solutions

EXPOL has been trusted by Kiwi builders and architects for over 45 years. Our expanded polystyrene (EPS) insulation systems are designed for strength, performance, and simplicity on-site.

• EXPOL Tuff Pods – Durable EPS pods for raft and floating floor systems. They provide strong formwork, excellent insulation, and faster installation without the need for concrete block perimeters.
• EXPOL SLABX200 – A new-generation high-performance EPS board designed for under-slab insulation. With a compressive strength of 200 kPa @ 10 % deformation, SLABX200 offers exceptional durability and thermal efficiency for residential and commercial builds.

Build Smart from the Ground Up

Once your concrete is poured, your chance to insulate is gone. By planning under-slab insulation from the start, you lock in long-term comfort and efficiency for the lifetime of the building.

Whether you’re an architect specifying a project or a builder getting ready for your next pour, spring is the perfect time to choose EXPOL for your foundation insulation.

Explore our range: www.expol.co.nz/concrete-floor-insulation/