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100mm Rockwool Twin Roll Loft Insulation

100mm Rockwool Twin Roll Loft Insulation
Guide Price
100mm Rockwool Twin Roll Loft Insulation
Guide Price: £63.04 (£75.65 inc VAT)
Price per m2: £9.55/m2 (£11.46 inc VAT)
5 or more £68.88 (£82.66 inc VAT)
8 or more £64.53 (£77.44 inc VAT)
10 or more £61.72 (£74.06 inc VAT)
  • Product Code: A1-3041
  • Delivery Time: 2 - 3 working days
  • Brand: Rockwool
  • (tech. support: 08712221780)
  • Model and Size: 2750x1200mm - 6.60m2
  • Weight: 14.52kg
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100mm Rockwool Twin Roll Loft Insulation

Thickness: 100mm
Width: 1200mm
Length: 2750mm
Roll Coverage: 6.6m2
Pack Quantity: 2
Density: 22kg/m3
Weight of 1m2: 2.2kg
Weight: 14.52kg
Thermal Conductivity: 0.044W/mK
R-Value: 2.27m2K/W
Fire Rating (Reaction to Fire): A1(Non-combustible)

100mm Rockwool Twin Roll is a fire resistant, non-combustible, medium density mineral wool insulation with high acoustic properties. The roll is manufactured as one 200mm roll, and is pre-cut down the middle to create the option of two 100mm rolls as one package. Rockwool Twinroll is the insulation solution is suitable for roof spaces in all building types, and as an overlay suspended ceilings. It does not react with any metal components or with PVC cabling and pipes in lofts. 

  • A multi-application product,
  • Provides excellent thermal performance to help keep rooms a comfortable temperature,
  • Absorbs sound, preventing noise travelling through roof spaces into internal spaces,
  • Non-combustible the insulation roll acts as a fire barrier,
  • Pre-split for ease of application,
  • Easy to cut and use for 400mm and 600mm centres,
  • Durable will not sag or slump,
  • Environmentally friendly - no harmful gasses used in the manufacturing process.
  • Loft spaces,
  • Between joists,
  • Over joists

  • Best installed in two separate layers.
  • The first layer of 100mm is first laid between the roof joists, making sure that it goes tightly around the joists. Opening, where necessary, can be cut with a sharp knife.
  • The second layer then used to cover the existing insulation and the roof joists to match the 300mm insulation cover according to Building Regulations.
  • To provide proper ventilation, a 500mm gap should be kept between the material and the eaves. 


  • Conforms to BS EN 13162:2001 Specification for factory-made mineral wool product,
  • Fire classification of A1 as defined in BS EN 13501-1.