90mm Knauf FrameTherm Roll 35 Glass Mineral Wool

90mm Knauf FrameTherm Roll 35 is a glass mineral wool roll designed for timber frame construction between studwork. With thermal conductivity of 0.032 to 0.040 W/mK, these rolls deliver excellent thermal performance. Non-combustible and rated Euroclass A1 for fire safety, they're manufactured using ECOSE® Technology bio-based binder for enhanced sustainability.

Product specification

• Thickness: 90mm
• Width: 1140mm (3 x 380mm)
• Length: 4500mm
• Roll Coverage: 6.84m2
• Pack Quantity: 3
• Density: 28kg/m3
• Weight/m2: 2.52kg
• Weight: 12.93kg
• Thermal Conductivity: 0.035W/mK
• R-Value: 2.55m2K/W
• Type: 90mm Glass Mineral Wool 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 snugly between timber studs, stopping air leakage and heat loss effectively.
• Available in two convenient sizes: 2x570mm or 3x380mm, matching standard timber stud spacing.
• Mineral wool construction provides superior sound absorption and noise reduction compared to many alternative insulation types.

Application

90mm Knauf FrameTherm 35 Rolls suit insulation of external walls and warm pitched roofs in timber frame buildings. Timber frame construction generally provides better thermal performance than comparable masonry walls. However, lighter timber structures benefit from insulation materials that offer improved acoustic properties to compensate. FrameTherm 35 rolls are engineered to friction fit between studs, reducing heat loss whilst simultaneously improving acoustic absorption for enhanced wall performance.

Real Performance

Glass and mineral wool installs more easily than rigid board alternatives. These materials adapt to minor surface variations and fit together seamlessly, eliminating air gaps. 90mm Mineral wool insulation accommodates substrate irregularities and building movement, maintaining consistent contact and thermal performance over time. Eliminating air gaps is essential for achieving genuine thermal performance in your application. Insulation that fails to deliver true 'as-built' performance compromises its core function and creates unnecessary risk as the construction sector works to bridge the performance gap.

Info

Browse our full Knauf Insulation range and filter by thickness or coverage on the left. For product suitability advice or bulk pricing, contact us on +4402038839057, email sales@insulationbee or use Live Chat for the best UK Knauf Mineral Wool Insulation prices.