1. Prepare the installation area

Ensure the wall, floor or ceiling cavity is clean, dry and free from obstructions. Check the spacing between timber or metal studs to determine the required slab dimensions.

2. Measure and cut the insulation

Measure the cavity carefully and cut the ROCKWOOL slabs using an insulation knife or suitable serrated blade. Cut slightly wider than the cavity where appropriate to achieve a snug friction fit.

3. Fit the insulation slabs

Position the slabs between the studs or joists, ensuring they fill the cavity without leaving gaps. The flexible stone wool structure allows the insulation to fit securely without additional fixings in many applications.

4. Avoid gaps and excessive compression

Install the insulation evenly throughout the cavity. Avoid compressing the slabs unnecessarily, as this can reduce their effectiveness and leave areas without adequate sound absorption.

5. Complete the wall or floor construction

Once installed, finish the construction with the specified plasterboard, flooring or ceiling system. For improved acoustic performance, consider using acoustic plasterboard, resilient bars and suitable acoustic sealant around perimeter joints.

Installation Tips

• Ensure all cavities are filled for consistent sound absorption.

• Seal gaps around sockets, pipework and other penetrations using suitable acoustic materials.

• Avoid rigid connections between separate wall or floor elements where acoustic isolation is required.

• Use appropriate protective clothing, gloves and dust protection when cutting and handling insulation.

• For demanding acoustic requirements, use the slabs as part of a properly designed sound-insulating wall or floor system.

Important: The acoustic performance of a wall or floor depends on the complete construction, including plasterboard layers, framing, insulation and perimeter sealing. Insulation alone does not make a wall or floor soundproof.

What is ROCKWOOL Sound Insulation Slab used for?

ROCKWOOL Sound Insulation Slab is designed to improve acoustic performance in internal walls, floors and partitions. It helps absorb airborne sound within building cavities, reducing noise transmission between rooms.

Is 50mm ROCKWOOL suitable for soundproofing walls?

Yes. The 50mm slabs are well suited to internal stud walls and partitions. They help improve sound insulation when installed as part of a suitable wall construction, particularly when combined with acoustic plasterboard and properly sealed joints.

How much area does one pack cover?

Each pack covers 8.64m² at a thickness of 50mm. Allow additional material for cutting waste and awkward spaces.

Can ROCKWOOL Sound Insulation Slabs be used between floor joists?

Yes. They can be installed between suitable floor joists to help reduce airborne sound transmission between floors. Additional measures, such as acoustic flooring or resilient ceiling systems, may be needed to address impact noise from footsteps.

Is ROCKWOOL Sound Insulation fire resistant?

Yes. ROCKWOOL stone wool is non-combustible and typically achieves a Euroclass A1 reaction-to-fire classification. This makes it suitable for use in appropriately designed fire-resistant building constructions.

Does ROCKWOOL Sound Insulation provide thermal insulation too?

Yes. In addition to absorbing sound, stone wool also provides thermal resistance, helping reduce heat transfer through walls, floors and ceilings.

Do I need a vapour barrier with ROCKWOOL Sound Insulation?

For typical internal partitions between heated rooms, a separate vapour control layer is not normally required solely because ROCKWOOL is being installed. However, walls or ceilings separating areas with different temperatures or moisture conditions may require additional moisture control measures.

Can I install ROCKWOOL Sound Insulation myself?

Yes. The slabs are relatively straightforward to cut and friction-fit between studs or joists, making them suitable for competent DIY installation. Always follow the manufacturer's instructions and relevant building regulations.

What is the difference between acoustic insulation and thermal insulation?

Acoustic insulation is primarily designed to absorb sound and reduce noise transmission, while thermal insulation focuses on limiting heat transfer. ROCKWOOL stone wool can provide both benefits, although the performance depends on the specific product and installation.

Will 50mm ROCKWOOL completely soundproof a room?

No. While it can significantly improve the acoustic performance of a properly designed partition, complete soundproofing requires attention to the entire construction, including wall mass, structural connections, doors, windows and air gaps.