Kingspan Aircell Permifloor 500 is designed to save you time on-site while preventing the “moisture traps” that can rot floor joists over time. Think of it as a high-performance breathable skin for the bottom of your house.
Features:
- It acts as both your insulation and your moisture control. You don’t need to mess around with separate layers.
- Most foil insulation traps water, which leads to mold. Permifloor has tiny, laser-cut holes that let water vapor escape, keeping the timber dry and healthy.
- It uses a “cross-linked” closed-cell foam. In plain English: it’s durable, doesn’t soak up water like batts, and won’t sag over time.
- 500mm Width: Pre-cut to fit standard joist spacings. No more awkward trimming.
- Reflective Foil: Bounces heat back into the house in winter and keeps it out in summer.
- Australian Made: Built to handle our specific climate and council standards.
Because it’s pre-cut to 500mm, it’s a “drop-in” solution. Simply roll it out between your joists. The perforated design means even if a pipe leaks or condensation builds up during the build, the water drains through instead of pooling on top of the insulation.
Applications:
- Install between floor joists in suspended timber floors to keep heat from escaping during winter.
- Fit beneath existing floors in older homes to reduce cold draughts coming up through the floorboards.
- Use in raised flooring systems to improve the overall energy efficiency of the house.
- Line the bottom of sub-floor spaces to provide a continuous thermal barrier while allowing moisture to drain away.











