Loft Insulation
InstaFibre Loft Quilt is available in 60mm, 80mm, 100mm,
150mm, 170mm and 200mm thicknesses in widths to suit
most joist spaces.
The material is rolled between the joists and may then
be applied in a second layer across the joists to prevent
the cold bridge that is created by the ceiling plasterboard
and each of the joists.
InstaFibre Blown Loft Wool is installed using a pneumatic
blowing machine, which cuts the material into consistent
pellets and blows them through a 65mm hose into position in
the roof. Only the hose is passed through your home during
installation as the machine remains permanently in the
installer's delivery vehicle. For inaccessible areas such
as ceiling voids, under boards or in difficult corners,
an injection nozzle may be used to provide a more controlled
delivery of the material through 18mm to 26mm holes.
The installer who has control over the speed and pressure
of the delivery determines the thickness of the material.
Technical Information
Manufactured in a wide variety of thicknesses and widths,
InstaFibre roof quilt is suitable for the thermal
insulation of loft spaces in domestic, commercial and
industrial buildings. Advantages include:
- High thermal insulation value
- Non-combustible
- Kite marked
- CFC and HCFC-free
- Non-hygroscopic
- Chemically inert
- Rot proof
- Will not provide sustenance to vermin
- Excellent sound reduction
- Easy to handle and install
- Economical
InstaFibre Loft Quilt and Blown Loft Wool
InstaFibre Loft Quilt and Blown Loft Wool are
manufactured to comply with the requirements of
BS EN 13162: 2001 Thermal insulation products for
buildings - Factory made MW products.
The packaging of the product carries the British
Standard Kitemark, which identifies the product as having
been tested and certified as being suitable for the
conditions for which it is intended.
Applications
InstaFibre Loft Quilt and Blown Loft Wool are suitable for
domestic and industrial use. Both materials are available
from the InstaGroup and its network of BBA approved installers.
Providing equivalent benefits, it provides a method of
insulating roof spaces that are difficult to access.
Composition
Manufactured within the UK, InstaFibre Loft Quilt and
Blown Loft Wool are coloured yellow and produced to meet
the latest European standards. It is available in a variety
of widths and thicknesses.
Table of Dimensions
| Thickness (mm) |
Length (m) |
Multi Contract Roll Pack area (m2) |
2x570mm widths Pack area (m2) |
3x370mm widths Pack area (m2) |
1x1170mm widths Pack area (m2) |
| 60 |
15.00 |
18.00 |
n/a |
n/a |
n/a |
| 80 |
11.25 |
13.50 |
n/a |
n/a |
n/a |
| 100 |
9.17 |
10.45 |
10.45 |
10.18 |
10.73 |
| 150 |
6.03 |
6.87 |
6.87 |
6.69 |
7.06 |
| 170 |
5.30 |
6.04 |
6.04 |
5.88 |
6.20 |
| 200 |
4.50 |
5.13 |
5.13 |
5.00 |
5.27 |
Fire
InstaFibre Loft Quilt and Blown Loft Wool are classified
as non-combustible with a Reaction to Fire Classification
A1 to BS EN 13501-1.
Gases: Vapour resistance
InstaFibre Loft Quilt and Blown Loft Wool possess
negligible vapour resistance allowing vapour to pass
freely through the insulation.
Sound
InstaFibre Loft Quilt and Blown Loft Wool can be used for
sound reduction in lightweight structures and partitions.
When used as the sound absorption medium in suspended ceilings,
it will achieve a typical noise reduction coefficient of 0.8
averaged over the range of 125 - 4000 Hz. Precise values will
depend on the thickness of the material and method of application.
Heat
| Thickness (mm) |
R-value (m2K/W) |
λ (W/m2K) |
| 60 |
1.35 |
0.044 |
| 80 |
1.80 |
0.044 |
| 100 |
2.25 |
0.044 |
| 150 |
3.40 |
0.044 |
| 170 |
3.85 |
0.044 |
| 200 |
4.50 |
0.044 |
Design Considerations
Condensation to avoid conditions that may cause interstitial
condensation, consideration should be given to installing a
vapour check on the warm side of the construction.
BS 5250:1989 Code of practice for the control of condensation
in buildings gives detailed guidance as to the precautions
to be taken in ensuring adequate ventilation.
Tiled pitched roof with insulation between and over ceiling joists
| Insulation* thickness (mm) |
none |
150 |
160 |
180 |
200 |
220 |
240 |
270 |
| U Values: Combined method |
2.50 |
0.28 |
0.27 |
0.24 |
0.21 |
0.19 |
0.18 |
0.16 |
*includes 100mm insulation between joists and an
additional layer over joists
U Values
U values to satisfy the Building Regulations: Approved
Document Part L of E & W and Approved Document
Part J of Technical Standards Scotland.
InstaFibre Loft Quilt and Blown Loft Wool are manufactured
to be suitable for installation in domestic roof spaces
and can be installed as a single layer between joists
or cross-laid between and over joists.
Supply Available from the InstaFibre network of 85 BBA
approved installers located throughout the UK. A full loft
insulation installation service is available to the requirements
of BS 5803: Part 5 1985 Click on Approved Installers to
find the one local to you.