Rockwool RWA45 Acoustic Insulation Slab - 1200 x 600 x 50mm

Name: Rockwool RWA45 Acoustic Insulation Slab - 1200 x 600 x 50mm
Brand: Rockwool
SKU: vyhik4j3ib
Availability: InStock

The Rockwool RWA45 delivers premium stone wool insulation engineered for comprehensive acoustic, t...

Best current price£60.32from Bradfords

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Rockwool Rwa45 1200 X 600 X 50Mm (6.48M2) Black/White

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Product Information

Full details

The Rockwool RWA45 Acoustic Insulation Slab is an ideal solution for contractors and DIY enthusiasts seeking superior soundproofing, fire safety, and thermal regulation for residential or commercial projects. This high-density stone wool provides comprehensive protection across walls, ceilings, and roofs, meeting strict Euroclass A1 non-combustible safety standards; however, users should note that as semi-rigid slabs, they require precise cutting to ensure a friction-fit seal in irregular framing cavities.

All features

Model Part Number	767866
Brand	Rockwool

Extended Product Information

FAQs

What are the dimensions of each slab?

Each slab measures 1200mm x 600mm x 50mm.

How much area does one pack cover?

Each pack contains 9 slabs, providing a total coverage area of 6.48m2.

Is Rockwool RWA45 waterproof?

It is water-repellent, meaning it resists water penetration, but it should not be used in direct contact with standing water or submerged applications.

Can I use this for soundproofing a bedroom?

Yes, it is highly effective at reducing noise transmission through internal walls and ceilings.

Does this product provide thermal insulation?

Yes, it is specifically engineered for both acoustic and thermal protection, helping to keep rooms warmer in winter and cooler in summer.

Is it safe to handle without protective gear?

It is recommended to wear gloves and a dust mask to avoid skin and respiratory irritation caused by the mineral fibers.

Troubleshooting

Slabs falling out of wall cavity

Ensure the width of the cut slab is 5-10mm wider than the gap to ensure a proper friction fit.

Difficulty cutting through the slab cleanly

Use a specialized serrated insulation knife and apply firm, even pressure; do not use standard utility blades.

Dust irritation during installation

Wear long sleeves, gloves, goggles, and a P2-rated dust mask to minimize contact with stone wool fibers.

Pros and Cons

Pros

Excellent sound absorption for improved acoustic comfort
Non-combustible Euroclass A1 fire safety rating
Water-repellent treatment prevents structural decay
High thermal efficiency helps lower energy usage
Easy to cut and fit into standard stud spaces

Cons

Requires professional cutting tools for precision sizing
Heavier than traditional fiberglass insulation products
Limited to interior or protected cavity applications
Standard slab size may require multiple cuts for non-standard joist spacing

Setup, Compatibility & Care

To install, measure the distance between your studs or joists and cut the slabs using a sharp, long-bladed insulation knife to ensure a snug friction fit. No mechanical fixings are typically required if the fit is correct. When handling the material, it is recommended to wear gloves and a dust mask to prevent skin irritation common with mineral wool products. Store the packs in a dry, ventilated area off the ground to ensure they remain moisture-free before installation. The RWA45 is compatible with standard timber and metal framing systems and meets the BS EN 13162:2012 standard for thermal insulation.