VOID-TEK vs Polystyrene: Why Flat-Pack Ground Heave Protection Is the Smarter Choice

The Hidden Risk Beneath Your Slab 

Expansive clays and sulphate soils can unleash massive upward pressure on slabs and foundations. Get it wrong, and the result is cracks, damage, and expensive remedial work. 

That's why void formers are essential. 

But here's the problem: not all void formers are created equal. 

The Limitations of Polystyrene Void Formers 

Polystyrene has been the industry default for decades. But in today's projects, its flaws are impossible to ignore:

• Bulky storage = wasted space on tight sites
• Offcuts = costly skips + environmental headaches
• Awkward handling = slow progress in congested areas
• Non-biodegradable = growing sustainability concerns  

In short: it works, but at a price the modern industry shouldn't have to pay. 

Introducing VOID-TEK: The Flat-Pack Alternative  

Premcrete's VOID-TEK solves these challenges with a smart, flat-pack design:

• 90% less storage volume → site space freed up
• Zero polystyrene waste → no disposal costs 
• Lightweight packs → easy to move + handle 
• Faster installation → expands on site into consistent voids 

It's leaner, greener, and built for real-world site conditions. 

Side-by-Side Installation Efficiency 

• Polystyrene: bulky logistics, cutting waste, awkward sequencing 
• VOID-TEK: flat-packed delivery, minimal prep, fast expansion

The result? Quicker install, less disruption, smoother programmes. 

Total Project Cost Impact 

While material price tags may differ, VOID-TEK wins when you add up:

• Reduced site storage + logistics planning 
• Lower transport costs (more units per load)
• Zero waste disposal (no skips) 
• Faster install = reduced labour + prelim costs 

When measured as a whole life project value, VOID-TEK often outperforms polystyrene. 

Performance + Sustainability 

VOID-TEK delivers the same structural protection against ground heave, plus:

• No reliance on polystyrene → stronger sustainability credentials 
• Safer handling → lighter loads, better H&S outcomes 
• Flexible installation → adapts to sequencing + site conditions 

Innovation in Action 

VOID-TEK reflects Premcrete's R&D commitment: solving the real-world challenges that groundworkers face on today's projects. 

It's not just a void former. It's a smarter, safer, more sustainable way to protect complex structures.