Kradal™ Acoustic
High-performance acoustic comfort for walls and floors. Kradal™ Acoustic Underlay is a high-density closed-cell polyurethane foam engineered for maximum sound insulation — independently tested to AAAC 6-Star performance.
Key Features
6-Star AAAC acoustic rating
L'nT,w 36 (vs 63 bare concrete)
FIIC 74
27 dB improvement over bare concrete
Bfl-s1 fire classification
6 Star Acoustics
The highest AAAC star rating achievable. L'nT,w of 36 and FIIC of 74 — independently tested by Koikas Acoustics to ISO 16283-2:2020 in February 2025.
Fire Rated Bfl-s1
Classified Bfl-s1 per EN 13501-1:2018. Approved for sleeping and non-sleeping occupancy in both sprinkler and non-sprinkler protected premises.
Floor and Wall
Designed for both beneath finished flooring and behind wall linings. Reduces impact and structure-borne noise.
Wet Area Suitable
Closed-cell construction — non-water absorbing. Can be installed in bathrooms and wet areas beneath appropriate vinyl floor coverings.
Exceeds BCA 2022
Far surpasses the BCA 2022 requirement of L'nT,w ≤ 62 for floors separating sole-occupancy units.
100% Recyclable
Manufactured with 10% renewable content. Antimicrobial and anti-fungal properties. Passive solution with no ongoing maintenance.
Kradal™ Acoustic Underlay is engineered for environments where acoustic comfort, speech privacy, and noise reduction are critical. Multi-residential apartments, aged care facilities, hospitals, hotels, childcare centres, and commercial offices all benefit from reduced impact and structure-borne noise.
The product integrates seamlessly beneath finished flooring or behind wall linings, improving acoustic performance without compromising stability, durability, or design intent. Once installed, it requires no ongoing maintenance — a passive, durable solution that works continuously.
Acoustic Testing
Tested by: Koikas Acoustics Pty Ltd
Standard: ISO 16283-2:2020
Rating: AS ISO 717.2-2004
The Kradal Acoustic Underlay achieved L'nT,w of 36, an FIIC of 74, and an AAAC 6-Star rating. This represents a 27 dB improvement over bare concrete (L'nT,w 63) and far exceeds the BCA 2022 minimum requirement of L'nT,w ≤ 62. Lower L'nT,w means better insulation; higher FIIC and AAAC star ratings mean better performance.
Acoustic Underlay vs Smart Foam Underlay
Kradal offers two distinct underlay products — choose based on your facility's primary need.
Applications
Both products can be installed in the same facility in different areas — for example, Smart Foam in resident rooms and corridors (where falls occur) and Acoustic Underlay in common areas and between tenancies (where noise transfer is the primary concern).