Home improvement insulation that combines thermal, acoustic and fire protection for floor and wall installations. Rockwool RWA45 Acoustic Insulation Slabs bring practical, easy-to-install performance and quieter living spaces during renovations. Are these slabs the right choice for your refurbishment or retrofit project?
⚡ At a Glance
- • Insulation Performance: Thermal and acoustic insulation combined with recognised fire protection
- • Best for: Homeowners and tradespeople insulating under floors and inside walls
- • Not ideal for: Structural or load-bearing applications where insulation is not sufficient
Thermal, acoustic and fire insulation are combined in a water-repellent slab format. Packs cover 4.32 m² at 75mm thickness for common renovation uses.
Improved fire safety – with A1 Euroclass fire rating
A1 Euroclass fire rating is stated in the product information, denoting top-level reaction-to-fire performance. The classification applies to the slab construction supplied.
Enhanced fire protection for internal voids and partitions, useful on projects with strict safety requirements.
Quieter rooms and reduced heat loss – thanks to combined thermal and acoustic insulation
Slab form supplies both sound absorption and thermal resistance through a continuous layer across cavities. Water repellent treatment helps maintain performance where minor moisture is present.
Effective reduction of airborne noise and better retention of warmth, making homes feel more comfortable and energy-efficient.
Easier fitting on site – with highly pliable slab construction
Pliable slabs allow trimming and gentle bending to fit between joists and studwork, simplifying installation in irregular cavities. User feedback highlights easier handling during fitting.
Saves installation time in refurbishment projects and makes tidy fitting possible in awkward spaces.
✨ The 4 Key Reasons for Rockwool RWA45 Acoustic Insulation Slabs
- A1 Euroclass fire rating – Improves fire safety in internal partitions and floor voids
- Water repellent finish – Reduces risk of moisture damage during installation and use
- Highly pliable slabs – Allows neat fitting around joists and irregular cavity shapes
- 75mm slab thickness – Provides consistent thermal and acoustic depth across floor assemblies
📋 Technical Details at a Glance
- Category: Acoustic and thermal insulation
- Brand: Rockwool
- Product type: Acoustic Insulation Slabs
- Thickness: 75mm
- Coverage per pack: 4.32 m²
❓ Frequently Asked Questions
Q: Are these slabs fire resistant?
A: Yes, the slabs have an A1 Euroclass fire rating as stated in the product information.
Q: Are the slabs water resistant for use in floor voids?
A: A water repellent finish is specified, helping to reduce moisture uptake during installation and in normal use.
Q: Are the slabs easy to fit in irregular spaces?
A: User reviews note that slabs are highly pliable, making trimming and fitting around joists and studwork straightforward.
🏆 Our Verdict
Suitable for homeowners, landlords and tradespeople needing reliable thermal, acoustic and fire performance during refurbishments. The combination of A1 Euroclass fire rating, water repellent finish and pliable slab construction makes the product especially useful for under-floor and in-wall installations. While initial outlay varies, long-term value comes from improved comfort, safety and potential energy savings.
