Most homeowners know the frustration of old insulation methods — itchy rolls of mineral wool, heavy PIR boards that never quite fit right, or the juggling act of adding vapour barriers and membranes to hit compliance. Each part plays a role, but together they create complexity: more materials, more labour and more chance for mistakes.
Actis Hybris changes all that. Its honeycomb structure replaces several layers with one intelligent panel that insulates, seals and stabilises at once — and when paired with HControl Hybrid, it forms one of the most efficient roof insulation systems available today.
This guide explains how it compares to mineral wool and PIR, how it works, and why it’s becoming the go-to choice for modern loft and roof insulation.
The problem with traditional systems
- Mineral Wool — needs a vapour barrier and careful detailing to stay airtight.
- PIR Boards — good thermal values but require taping, sealing and precision cutting.
- Multi-layer membranes — improve airtightness but only when combined with other products.
The result is a multi-step install that increases both cost and risk. One gap or tear in any layer can compromise the whole system.
A modern insulation solution should be simpler — fewer materials, fewer joins, fewer variables. That’s exactly what Actis Hybris delivers.
What is Actis Hybris?
Actis Hybris is a hybrid honeycomb panel made from reflective films and structured foam cells. Instead of relying on thickness alone, it traps still air inside a three-dimensional matrix — maximising performance with a slimmer build-up.
- Thermal conductivity λ = 0.033 W/mK
- Built-in airtightness — no extra vapour barrier
- Lightweight, clean and easy to cut
- Fully compliant with UK Building Regulations
Thermal performance comparison
For a full overview of Hybris insulation thermal performance in real homes, including how we specify it for lofts and underfloor spaces, see our main Hybris Insulation page.
| Product | Typical Thickness (mm) | Thermal Conductivity (W/mK) | Notes |
|---|---|---|---|
| Mineral Wool | 270 | 0.044 | Needs separate vapour barrier |
| PIR Board | 150 | 0.022 | Requires taping and sealing |
| Actis Hybris | 105 | 0.033 (eq.) | Built-in airtight layer |
Why Hybris outperforms traditional insulation
1. Fewer layers, simpler build
Mineral wool and PIR often need separate membranes or vapour barriers to comply with Building Regs. Hybris combines insulation, airtightness and thermal efficiency in one product — saving time and avoiding compatibility headaches.
2. Faster, cleaner installation
Panels cut neatly with a knife, slot between rafters and generate almost no dust. No fibres, no irritation, no heavy PPE required.
3. Consistent performance
Each panel interlocks and seals to prevent cold bridging or patchy coverage — meaning stable comfort and lower heating bills.
4. Less waste, lower labour cost
Fewer materials = fewer deliveries, faster installs and less landfill waste — reducing total cost without compromise.
Equivalent thermal performance
| Target U-Value (W/m²K) | Mineral Wool Depth | PIR Depth | Hybris Depth |
|---|---|---|---|
| 0.18 | 300 mm | 180 mm | 155 mm |
| 0.16 | 330 mm | 200 mm | 175 mm |
| 0.14 | 370 mm | 230 mm | 195 mm |
HControl Hybrid — the optional upgrade
HControl Hybrid is Actis’s reflective internal “blanket” layer that adds vapour control, reflectivity and extra airtightness. It isn’t required, but it’s ideal for high-performance or low-energy builds.
- Creates an additional airtight layer on the warm side
- Reflects radiant heat back into living space
- Acts as a vapour control layer
- Lightweight and flexible for quick fitting over Hybris
Do I need HControl Hybrid with Hybris?
Not always. Hybris alone gives airtightness and thermal performance. HControl Hybrid is for when you want to push efficiency further or meet stricter U-values.
When should I use it?
Perfect for roof upgrades, dormers or new-builds where airtightness and moisture control are key — especially in colder regions.
How is it installed?
Rolled out over the Hybris layer before plasterboarding. Joints are taped and sealed for a complete reflective barrier.
Technical performance & compliance
Both Actis Hybris and HControl Hybrid meet UK Building Regulations and carry BBA certification. Hybris complies with BS EN 13171 and BS EN ISO 6946. Together they support better EPC ratings, lower CO₂ output and long-term stability since they don’t slump or degrade over time.
Why homeowners choose Actis Hybris
- Low-disruption fitting — panels slot neatly between rafters, keeping your home clean and quiet during work.
- No mess or fibres — no dust, no smell, no post-install cleanup.
- Precision fit — the honeycomb design adapts to uneven rafters for full coverage and no heat loss gaps.
- Quick turnaround — replacing multiple layers means faster completion and less time with tools in the loft.
- Lasting comfort — Hybris won’t sag or settle, so your home stays warm and efficient year after year.
With Carbon Zero Solutions Ltd, your installation is clean, documented and built to last.
Where Hybris & HControl work best
- Loft insulation — retrofit or new-build spaces
- Pitched roof insulation — between and below rafters
- Extensions & dormers — compact build-ups where every mm counts
- Energy upgrades — improve EPC ratings without major disruption
Environmental & practical advantages
Hybris is 100 % recyclable and produces minimal waste. Its reflective surfaces help stabilise temperature, reducing heating demand in winter and excess heat in summer — one of the most eco-efficient roof insulation options available.
Summary — why the smarter system wins
- Traditional insulation = multiple layers, more labour, more cost.
- Actis Hybris = one product that insulates, seals and stabilises.
- HControl Hybrid = optional upgrade for top-tier performance.
Together they form a modern roof-insulation system that’s simpler, faster and cleaner — perfect for homeowners who want quality without complication.
Related reading:
Actis Hybris Insulation •
Loft Insulation •
Spray Foam Removal •
Felt Lap Vents
