Knauf FrameTherm Roll 35 - 140mm Glass Wool

140mm Knauf FrameTherm Roll 35 is a glass mineral wool roll engineered for timber frame construction, fitting snugly between studwork. With thermal conductivity of 0.032 W/mK to 0.040 W/mK, this 140mm insulation roll delivers excellent thermal performance. Non-combustible and rated Euroclass A1 for fire safety, it's manufactured with ECOSE® Technology bio-based binder for environmental responsibility.

Product specification

• Thickness: 90mm
• Width: 1140mm (2 x 570mm)
• Length: 3900mm
• Roll Coverage: 4.45m2
• Pack Quantity: 2
• Density: 28kg/m3
• Weight/m2: 2.52kg
• Weight: 12.93kg
• Thermal Conductivity: 0.035W/mK
• R-Value: 4.0m2K/W
• Type: 140mm Glass Mineral Woll Insulation
• Application: Timber frame walls, Pitched roofs at rafter level
• Facing: Unfaced
• Roll Type: Ready-cut
• Fire Rating (Reaction to Fire): A1(Non-combustible)

Advantages

• Pre-cut rolls fit between timber studs with friction grip, stopping air leakage and heat loss effectively.
• Available in convenient widths of 2x570mm or 3x380mm to match standard timber stud spacing.
• Mineral wool construction provides outstanding sound absorption and noise reduction performance compared to conventional insulating materials.

Application

Knauf FrameTherm 35 140mm rolls suit external walls and warm pitched roofs in timber frame buildings. Timber frame walls typically outperform masonry walls of equivalent thickness for thermal insulation. However, timber's lower mass means insulation materials must provide enhanced acoustic performance to compensate. FrameTherm 35 rolls friction-fit between studs, reducing heat loss whilst delivering acoustic absorption to boost overall wall performance.

Real Performance

Glass and rock mineral wool offers simpler installation than rigid boards, conforming to substrate irregularities and interlocking to eliminate air gaps. 140mm Mineral wool insulation accommodates substrate variations and building movement, maintaining thermal contact and performance over time. Eliminating air gaps is essential for genuine as-built performance. Insulation that fails to deliver actual thermal performance undermines its purpose and risks widening the construction performance gap.

Info

Explore our full Knauf Insulation range and refine by thickness or coverage using the left-hand filters. For product suitability advice or bulk quotations, contact us on +4402038839057, email sales@insulationbee or use Live Chat - best UK Knauf Mineral Wool Insulation prices.