Rockwool

Rockwool is one of the biggest, most reliable and trusted insulation brands in the world.

Rockwool insulation is made from mineral wool, a non-combustible, highly dense solution offering excellent acoustic, thermal and fire-resistant properties.

At National Insulation Supplies, we sell an extensive range of Rockwool insulation suitable for a wide variety of floor, wall, and roof applications.

Like other insulation, Rockwool is relatively easy to install if you have prior DIY knowledge. If you're unfamiliar with the Rockwool range, please see our breakdown below of some of their most popular products.

Rockwool RWA45 (General purpose)

RWA45 is a high-performance, non-combustible insulation slab offering good thermal, acoustic and fire properties. It’s highly cost-effective and can be installed in various applications, easily friction-fitting into place.  

Product specification:

Applications: Partition walls, ceilings, floors and roofs.

Size: 600mm x 1200mm

Thickness: 25mm - 100mm

R-Value: 0.035 W/mK

Thermal density: 45 kg/m3

The Rockwool range shares identical characteristics, aside from the thermal density:

RWA45: 45 kg/m3

RW3: 60 kg/m3

RW4: 80 kg/m3

RW5: 100 kg/m3

RW6: 140 kg/m3

Rockwool Soffit Slab

The Rockwool Soffit Slab is a non-combustible stone wool insulation solution used in concrete soffits, which has been tested to provide 4 hours of fire protection. They have varying facings, including black and white tissue and aluminium foil. They offer excellent fire-resistant, thermal and acoustic properties, making them ideal for anyone needing all-round insulation.

Product specifications:

Applications: Concrete soffits

Size: 600mm x 1000mm

Thickness: 50mm - 160mm

R-Value: 0.034W/mK

Rockwool Insulation Rolls

Rockwool thermal insulation rolls have been specifically designed for loft space applications, keeping the heat in during the winter and cold out during the summer. 

Product specifications:

Applications: Loft 

Size: 1200mm x 2750mm

Thickness: 100mm

R-Value: 0.044 W/mK

Rockwool Floor Insulation

Insulating a floor is necessary for many reasons, from improving energy efficiency to reducing unwanted noise levels. 

Rockwool's RockFloor range has high compressive strength, absorbs sub-floor imperfections and is suitable for various installation methods. There are two RockFloor solutions: Thermal and Acoustic. 

Thermal RockFloor achieves a thermal conductivity of 0.038 W/mK and minimises thermal bridging on ground floors. Acoustic RockFloor achieves a slightly higher thermal conductivity of 0.040 W/mK and reduces unwanted noise between intermediate and separating floors.

National Insulation Supplies offers a wide selection of high-performance acoustic, thermal and fire-resistant Rockwool insulation available at low online prices you won't find elsewhere.

We have an excellent trust pilot rating, a secure online payment system and fast delivery no matter where you are in the country. Join thousands of satisfied customers today and get the best deal on Rockwool insulation!

We supply more than Rockwool - check out some of our other insulation brands, including Kingspan, Knauf and Ecotherm, alongside our full range of mineral wool insulation.