RAFTER ROLL
- Very high thermal performance.
- Combined thermal and acoustic performance.
- Quick and easy installation.
- Friction fitting allows rafter spacing to be completely filled.
| Thickness (mm) | Width x Length(mm) | Area per roll (m2) | R-Value (m2K/W) | Thermal Conductivity (W/mK) |
|---|---|---|---|---|
| 75 mm | 1200 x 5250 | 6.30 | 2.30 | 0.032 |
| 85 mm | 1200 x 4600 | 5.52 | 2.65 | 0.032 |
| 100 mm | 1200 x 4000 | 4.80 | 3.10 | 0.032 |
Due to the number of ways Rafter Roll can be used for pitched roof insulation, as well as the number of different types of pitched roof designs around, complete and comprehensive installation instructions can be found on the Knauf Insulation website:
Loft Conversions- Mineral Wool Between Rafters
Loft Conversions- Mineral Wool Between Rafters & Polyfoam Linerboard Below
New Build & Upgrade- Living Roof: Insulation Between Rafters
New Build & Upgrade- Living Roof: Insulation Between & Below Rafters
New Build & Upgrade- Warm Roof: Insulation Above & Between Rafters
Application
Rafter Roll is for insulating between the rafters of pitched roofs of both new build and existing buildings. It is easy to cut and friction fit between rafters.
As Rafter Roll is unfaced, it is necessary to add a separate vapour control layer on the warm side of the insulation. In accordance with Building Regulation requirements, a 50mm ventilation path must be preserved behind the insulation where the underlay has high vapour resistance, for example traditional roofing felt.
Rafter Roll can be used either as a single or double layer between rafters, or as the first layer of a two layer system in combination with Polyfoam Linerboard.
Standards
Rafter Roll is a non-combustible inorganic glass wool, defined as mineral wool in BS 3533: 1981 and is manufactured in accordance with BSI Quality Assurance Standard BS EN ISO 9001: 2000.
Durability
Rafter Roll is odourless, rot proof, non-hygroscopic, does not sustain vermin and will not encourage the growth of fungi, mould or bacteria.
Environmental
Rafter Roll is free from CFCs, HCFCs and any other material with ozone depletion potential in its manufacture and content and represents no known threat to the environment.
Rafter Roll's manufacture has a low impact on the environment and is classified as Zero ODP and Zero GWP.
Vapour Resistivity
Rafter Roll allows water vapour to pass freely through it, therefore allowing the construction element to breathe.
Rafter Roll is unfaced, making it necessary to install a separate vapour control layer.
Handling and Storage
Rafter Roll is easy to handle and install, being lightweight and easily cut to size.
It is supplied in polythene packs which are designed for short term protection only. For longer term protection on site, the product should either be stored indoors, or under cover and off the ground. Installation instructions are on every pack. Rafter Roll should not be left permanently exposed to the elements.
