Moisture-resistant wood fibre insulation for roofs and facades
Gutex Multitherm is a hydrophobic softwood fibre board, ideal for ventilated facades and as diffusion-open rafter insulation. With thicknesses of up to 200 mm, it provides effective insulation of roof and facade in a single operation, saving time and money. Its format of 1760 x 600 mm also contributes to rapid installation, particularly on roofs. In addition, ecological Multitherm impresses with its excellent thermal insulation properties thanks to low thermal conductivity (λD 0.040 W/mK) and excellent heat storage capacity.
- Excellent thermal insulation performance for year-round living comfort and low-rise buildings
- On facades, can be exposed to the elements for up to 4 months thanks to its water-repellent finish
- Time-saving installation thanks to high dimensional accuracy and large format
Nominal value of thermal conductivity λD
0,040 W/mK
Design value of thermal conductivity λB
0,042 W/mK
Product details
Natural, durable rafter insulation with Multitherm
Multitherm, a recyclable wood-fibre board, is also suitable for use as roof insulation on rafters from a thickness of 60 mm upwards. After installation, the board must be fixed and immediately protected with an underlay. In combination with underlay sheets from Gutex partners such as Ampack, ProClima, Isocel or Würth, it is even possible to create low-slope roofs ≤10° to ≥5° diffusion-open pitch - for greater building physics safety and living comfort. Alternatively, Multiplex-top can also be used as a rainproof underlay from a roof pitch of 15° upwards.
- Thermal insulation that can be fitted from both sides - for new build and renovation projects
- Enables the creation of flat roofs open to diffusion in combination with a suitable underlay sheet
- Recyclable, made in Germany
Ingredients
- Untreated fir and spruce wood
- 4% PUR resin
- 1.0% paraffin
Gutex Multitherm: perfect for ventilated façades and as rafter insulation
Storage and processing
- Store and use Multitherm in a dry place.
Cutting
- Cutting is carried out using standard wood-cutting machines, and the statutory guidelines for handling wood dust must be observed.
Important notes
- Lay the panels crosswise to the supporting structure, with a precise fit and watertight joints.
- Cross joints are not permitted.
- Damaged panels must not be installed.
- The plate must not be applied statically
- Increased humidity loads on the room side should be avoided.
- Various manufacturers offer advice and static recommendations on suitable screws, which can be easily requested via a form.
use in walls (on masonry, solid wood, ventilated facades)
Respect the dimensions of the grid :
- Panel thickness 40 mm: max. grid 62.5 cm
- Panel thickness 60-100 mm: max. grid 83.5 cm
- Panel thickness 120-200 mm: max. grid 93.5 mm
- Fix immediately with a rear ventilation batten.
- Joints should be at least 30 cm apart
- For fixing when used on a ventilated façade, see the technical data sheet (link).
- 4 weeks exposure to the elements.
Respect the dimensions of the grid :
- Panel thickness 40 mm: max. grid 62.5 cm
- Panel thickness 60-100 mm: max. grid 83.5 cm
- Panel thickness 120-200 mm: max. grid 93.5 mm
- Fix immediately with a rear ventilation batten.
- Joints should be at least 30 cm apart
- For fixing when used on a ventilated façade, see the technical data sheet (link).
- 4 months exposure to the elements.
Installation in the roof (rafter insulation)
- Only use Multitherm from 60 mm thickness upwards.
- Maximum grid dimension for the rafter plane: 90 cm.
- Stagger the joints from one row to the next by at least 1 rafter centre distance.
- The spaces between the rafters are not accessible.
- After laying, fix the panel and protect it immediately with an underlay (e.g. Multiplex-top or a suitable sheet). Finally, fix the insulation panel and the underlay with counter-battens in accordance with the static requirements. The manufacturers' forms for requesting the correct screw dimensions for the object are available here.
to find. - Multitherm is not a load-bearing element (e.g. snow loads).
Fixings for use in ventilated façades
Multitherm from 80 mm thickness upwards must be fixed with screws approved by the fixing manufacturer.
Wind load zone 1 → 22.5 m/s
Wind load zone 2 → 25.0 m/s
Wind load zone 3 → 27.5 m/s
Wind load zone 4 → 30.0 m/s
In Table 2 below, the wind pressures calculated according to Table 1 are divided into wind suction categories 1 to 4 for simplicity's sake. These wind suction categories have been sensibly composed from the values in Table 1 and have nothing in common with the wind zones according to DIN 1055. In addition, the nails required and the maximum distance between nails are indicated for a distance between ribs of 62.5 cm and 83.5 cm.
Multitherm in thicknesses of 80 mm and above must be fixed using approved screws. The following forms are available from the manufacturers for requesting the correct screw dimensions for the object in questionhereto find.
| Bulk density ρ | ~ 140 kg/m³ |
| Vapour diffusion (μ) | 4 |
| Nominal value of thermal conductivity λD | 0,040 W/mK |
| Design value of thermal conductivity λB | 0,042 W/mK |
| Design value of thermal conductivity λB ACEMI | 0,042 W/mK |
| Compressive stress strength | ≥ 100 kPa |
| Short-term water absorption | ≤ 1 kg/m² |
| Airflow resistance | ≥ 60 kPa s/m² |
| Specific heat capacity | 2100 J/kgK |
| Fire behaviour Euroclass according to DIN EN 13501-1 | E |
| Plate labelling | WF‑EN 13171‑T4‑WS1,0‑ DS(70,‑)2‑CS(10/Y)100‑TR7,5‑ MU4‑AFr100 |
| Tensile strength perpendicular to the board surface | ≥ 7,5 |
