Insulation slabs, such as Rockwool RWA45, help ensure your building achieves effective thermal protection. As a widely trusted mineral wool insulation product in the UK, RWA45 is a popular choice across the construction sector.
What is RWA45 insulation?
RWA45 offers more than just thermal insulation. It is also a highly effective acoustic insulator, blocking unwanted noise in spaces where it is used. It provides the density and rigidity required to create secure installations in buildings. This mineral wool insulation slab is made from basalt rock and boasts exceptional fire resistance.
What is RWA45 insulation used for?
RWA45 is a multipurpose product used to:
Reduce sound transfer between rooms and floors
Ensure effective heat retention within buildings.
Create energy-efficient spaces.
Improve comfort in rooms.
It is also used as part of fire protection systems to enhance building safety because of its non-combustible nature.
Specific places where you can install Rockwool RWA45 include:
Internal partitions and wall systems.
Ground, intermediate and separating floors.
Ceilings.
Roof and loft spaces.
It is equally effective in commercial and industrial environments that require high acoustic performance, such as schools, hospitals, offices and studios.
Types of RWA45 insulation slabs
All Rockwool RWA45 slabs are composed of similar material. They only differ in thickness. Thickness options for RWA45 range from 25 mm to 100 mm.
Thinner RWA45 slabs are best suited for stud walls and partitions.
Medium RWA45 slabs work well for ceiling and floor insulation.
Thicker RWA45 slabs are typically used for separating walls, suspended ceilings, and industrial partitions where high noise absorption is required.
Benefits of Rockwool RWA45 slabs
Rockwool RWA45 offers numerous key advantages that make it one of the UK’s most popular insulation choices:
Effectively absorbs sound, reducing airborne noise between floors and rooms.
Maintains stable indoor temperature, improving comfort and energy efficiency.
It can contribute to reduced heating costs.
Resistant to moisture, rot and mould growth.
Non-combustible and won’t spread flames.
Durable and can maintain its insulation performance over the lifetime of the building.
It is lightweight and easy to install.
Why choose our Rockwool 45 slabs?
Insulation Wholesale stocks genuine Rockwool RWA45 insulation slabs in varied thicknesses. Whatever your project demands, we have a suitable RWA45 thickness for it.
We store all slabs carefully to protect them from dust and moisture damage, so they reach you in excellent condition.
Get expert guidance from our team and identify the RWA45 slabs that match your U-value or acoustic performance targets.
Our fast nationwide delivery and competitive pricing make it easy to source quality Rockwool insulation for any build.
Upgrade your next project with Rockwool RWA45 – insulation that delivers consistent thermal, fire, and acoustic performance.
At Insulation Wholesale, you can purchase Rockwool RWA45 at low wholesale prices with fast delivery for most of items within 2-5 days. Competitive rates guaranteed.
FAQ
What is Rockwool RWA45?
Rockwool RWA45 is a mineral wool insulation slab made from volcanic rock. It is semi-rigid in structure and provides excellent acoustic, thermal and fire protection. RWA45 is commonly installed in homes as well as in commercial and industrial spaces.
What does RWA45 mean?
RWA45 is a type of insulation slab used for thermal and noise control. The RW in RWA refers to Rockwool, the brand behind RWA45. A is for acoustic, which tells you the slab is also great at dampening sound. The number 45 is a nod to the slab’s density, which is 45 kg/m³.
How to install RWA45 Slabs?
Measure your RWA45 slab and ensure it fits in the space where you want to install it. Position your insulation in the space. If laying it in layers, keep the slabs close together to ensure there is continuity of insulation. Use the appropriate fastener for your application, or friction-fit the slab in a framed wall system where applicable. Your installation should comply with relevant Building Regulations. Always wear protective gloves and a mask when handling mineral wool.
How to cut Rockwool RWA45?
You’ll need a fine-toothed saw or insulation knife. Ensure the blade is sharp so you can get a neat cut. Mark the area where you’re going to cut on the panel. Then, carefully slice the slab following your markings. If using a saw, engage a guide to keep your line straight. An insulation knife will make it a lot easier, as it was designed to split insulation material. Cut in a well-ventilated area to minimise dust.
100mm Rockwool RWA45 has been developed for thermal, acoustic and fire performance in a range of construction types. It is suitable for applications on partition walls, ceilings, floors and roofs.
£23.41£28.09Ex VATInc VAT£8.13£9.76Per m2Add to cart
50mm Rockwool RWA45 has been developed for thermal, acoustic and fire performance in a range of construction types. It is suitable for applications on partition walls, ceilings, floors and roofs.
£27.94£33.53Ex VATInc VAT£4.31£5.17Per m2Add to cart
75mm Rockwool RWA45 has been developed for thermal, acoustic and fire performance in a range of construction types. It is suitable for applications on partition walls, ceilings, floors and roofs.
£27.24£32.69Ex VATInc VAT£6.31£7.57Per m2Add to cart
25mm Rockwool RWA45 has been developed for thermal, acoustic and fire performance in a range of construction types. It is suitable for applications on partition walls, ceilings, floors and roofs.
30mm Rockwool RWA45 has been developed for thermal, acoustic and fire performance in a range of construction types. It is suitable for applications on partition walls, ceilings, floors and roofs.
40mm Rockwool RWA45 has been developed for thermal, acoustic and fire performance in a range of construction types. It is suitable for applications on partition walls, ceilings, floors and roofs.
60mm Rockwool RWA45 has been developed for thermal, acoustic and fire performance in a range of construction types. It is suitable for applications on partition walls, ceilings, floors and roofs.
