ROCKWOOL RWA45 Insulation
ROCKWOOL RWA45 Insulation is a versatile stone wool insulation slab designed to provide effective acoustic, thermal and fire performance across a wide range of building applications. Manufactured from stone wool, RWA45 is suitable for use in walls, floors, ceilings and roofs, making it a practical insulation solution for both residential and commercial construction projects.
With a nominal density of 45kg/m³, ROCKWOOL RWA45 provides a balance of thermal insulation and sound absorption while remaining straightforward to install between suitable framing and construction elements. Standard slabs measure approximately 1200 x 600mm and are available in a range of thicknesses to suit different project requirements.
Thermal Insulation Performance
ROCKWOOL RWA45 has a declared thermal conductivity of 0.035 W/mK, helping reduce unwanted heat transfer through walls, floors, ceilings and roof constructions.
Installing suitable insulation can help improve the overall thermal performance of a building, creating more comfortable internal spaces while supporting energy-efficient construction. RWA45 can be incorporated into a range of building systems where reliable thermal insulation is required alongside additional acoustic and fire-performance benefits.
Its versatility makes it suitable for both new-build developments and refurbishment projects where existing walls, floors or ceilings are being upgraded.
Excellent Acoustic Properties
Stone wool naturally provides effective sound absorption, making ROCKWOOL RWA45 a popular choice for projects where reducing noise transmission is important.
The structure and density of ROCKWOOL stone wool help trap sound waves and damp vibrations, reducing the amount of noise passing between rooms or entering a building from outside.
This makes RWA45 particularly useful within internal partition walls, separating walls, intermediate floors and ceilings. It can be used in homes, offices and other buildings where improved acoustic comfort and privacy are required.
Whether you are creating a quieter bedroom, improving sound separation between rooms or insulating a commercial space, RWA45 provides a practical acoustic insulation solution.
Non-Combustible Stone Wool Insulation
Fire performance is another key advantage of ROCKWOOL RWA45. The product achieves a Euroclass A1 reaction to fire classification, meaning it is classified as non-combustible in accordance with EN 13501-1.
Because the insulation itself will not contribute towards the growth of a fire, RWA45 can help support safer building designs when correctly incorporated into tested and specified construction systems.
This combination of fire, acoustic and thermal performance means one insulation product can contribute to several different building-performance requirements.
Suitable for Multiple Applications
ROCKWOOL RWA45 can be used across a variety of general building applications. ROCKWOOL lists suitable applications including partition walls, separating walls, intermediate floors, flat roofs and metal wall systems.
It can also be used within drylining and partition systems, ceilings, floors, roofs and suitable external wall constructions.
The semi-rigid slab format makes it particularly convenient for fitting between framing members and within cavities where insulation needs to remain securely positioned.
Durable and Versatile Insulation
ROCKWOOL stone wool insulation is designed to maintain its shape and thickness over time, helping preserve its acoustic performance throughout the life of the building.
RWA45 is also available in a range of thicknesses, making it easier to select a suitable specification depending on the construction build-up and performance required.
For projects requiring a combination of sound insulation, thermal performance and non-combustible protection, ROCKWOOL RWA45 Insulation provides a dependable and versatile solution.
Suitable for walls, floors, ceilings and roofs, it is an excellent choice for both professional construction projects and property renovation work where long-lasting insulation performance is required.
Product Specifications:
| Length (mm) | Width (mm) | Thickness (mm) | Pieces/Pack | m²/Pack |
| 1200 | 600 | 100 | 4 | 2.88 |
