Insulation Rolls

What are Insulation Rolls? 

Insulation rolls are flexible, fibrous materials, typically supplied in large, continuous lengths. This allows for efficient, customisable cutting on-site. They are ideal for covering expansive, unobstructed areas such as lofts, unconverted attics, and the spaces between timber joists or studs in walls and floors.

The enduring value of insulation rolls lies in their fundamental function: establishing a robust, long-lasting thermal barrier. 

By trapping air within their fibrous matrix, they consistently impede heat transfer. This means, year after year, in colder months, the heat generated by your systems is retained, preventing costly escape. 

When temperatures rise, insulation rolls form an effective thermal buffer, limiting heat gain through the building envelope. The indoor climate remains steady, so air-conditioning cycles less often, and energy costs fall - benefits that endure for the life of the building.

Two Forms of Mineral Wool

Mineral-wool products are manufactured in glass and rock variants. Both deliver excellent thermal resistance and sound absorption, yet their distinct fibre structures make each better suited to particular applications.

Glass Mineral Wool

Produced from recycled glass spun into fine, flexible fibres, glass wool traps millions of minute air pockets. This low-density matrix excels at slowing heat flow, making it the preferred option when maximum thermal performance and ease of handling are essential.

• Loft and attic spaces - Between and over joists
• Timber-frame wall cavities - Lightweight rolls slot in quickly
• Pitched roofs - Between rafters to meet tight U-value targets

Flexible rolls cut cleanly with a utility knife and friction-fit between structural members, reducing labour time.

Rock Mineral Wool

Rock-wool batts start life as volcanic rock that’s melted and spun into a thick, springy blanket. Its increased density significantly improves sound absorption and compressive strength while still maintaining excellent thermal insulation performance.

Room-to-room partitions - Quietens voices and TV chatter
Timber or suspended floors - Cushions footfall and airborne sound
Cavity walls - Teams thermal control with built-in fire resistance

When projects carry strict acoustic or fire-safety targets, boards like Rockwool RWA45 tend to top the spec sheet.

Shared Advantages

• Non-combustible - Euroclass A1
• Easy to trim - Score, snap, push into place; no special kit
• Set-and-forget - Won’t slump or lose performance over decades

Pick glass wool when every gram and U-value counts; choose rock wool when density, quiet, or extra fire protection tips the scales. Either way, you end up with a tighter, safer, cheaper-to-run building.

Typical Applications

• Timber-frame separating walls
• External timber-frame walls
• Internal timber floors
• Internal concrete floors
• Separating floors
• Roof junctions
• Stud partitions
  
  

Core Benefits

• Cuts heat loss, trims energy bills
• Keeps indoor temps steady
• Mutes noise
• Resists moisture
• Boosts fire safety
• Installs fast
• Lasts the life of the building
• High recycled content
  
  

Cutting Insulation Roll

• Set up on a flat surface (plywood on trestles works).
• Gear up - gloves, long sleeves, mask, goggles.
• Measure & mark the length with a tape and felt-tip.
• Straightedge on the line, score with a sharp utility knife.
• Flex and finish the cut for a clean edge.