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Thermal insulation

Applying insulation material

Processing insulation wedges

Rafter clearance + 10 mm

The initial format of a pair of insulation wedges cut in the factory totals 100x62.5 cm. By offsetting them against each other, all widths for standard rafter clearances can be achieved.

1. Initially, the rafter depth is measured out in order to determine the appropriate insulation wedge thickness. With a back-ventilated construction, a back ventilation clearance of 2 cm is required. Observe this clearance when planning the insulation material thickness.
2. If the rafter depth is insufficient for insulations, the rafters are lined.
3. So that the insulation wedges hold well, add 1 cm to the determined dimension. Obtain the required dimension by offsetting the insulation wedge pairs, and cut off the projecting corners. The first insulation wedge can now be inserted.
4. Further wedges can now be installed. Due to the high rigidity of the material, these can be wedged in by tapping them with the aid of a wooden board.
5. A large roof area can be insulated within a short time in this way.
6. In order to achieve air tightness of the insulated area, a PE foil is applied. These must overlap at the seams, and then be covered with adhesive approved for the purpose.
7. It is possible to retrofit attics which have already been extended with insulation. The insulation wedges are inserted between the rafters via two wooden boards used as a slide. The wedges can be firmly connected through gentle taps.
8. Create a seamless connection in dry construction behind the jamb. Interruptions in the insulation progression must be avoided.

Laying clamping felt

1. Measure out the width of the rafter area.
2. Simply cut the measured width plus 1 cm clamping edge from the insulation material roll. With a straight cut (important for joint-free laying), a line marking helps.
3. Press the clamping felt between the rafters. It will stay there and fit well. Further fastening is not necessary. However, please ensure that it connects closely with the previously laid insulation material sections and penetrating components so that good joint fit is achieved.

Insulating walls

Creating an airtight and wind-resistant insulation layer according to the standard

1. Starting at the top, staple on the climate membrane or vapour barrier foil laterally across the rafters. Ensure that the strips overlap by approx. 10 cm.
2. Adhere this foil overlap with adhesive tape approved for the purpose. Double-sided or single-sided adhesive tape can be used (simply adhere over the joint).
3. Foil which connects with components (windows, gable walls, vent pipes, chimneys etc.) is to be sealed with sealing tape and pressure plates. ** When using sealing materials, the pressure plates are not required. We have an assortment of special adhesive tapes and/or materials available for you.

* Requirements acc. 3. Thermal Insulation Ordinance and DIN 4108, Thermal Insulation in Buildings

** This is stipulated in the DIN 4108 standard.

Insulating walls

1. It is easy to apply insulation from the outside. You need battens which are thicker than the insulation material. Insulation panels made of mineral wool are added to the intermediate spaces. Observe the appropriate space for back ventilation. Then a weatherproof cladding is applied.
2. Another possibility is the double wall. The insulation material is attached to the old wall. The facing bricks can then be firmly attached using anchors.

Tools and insulation wedges

The tools

1 PE vapour barrier

2 Adhesive tape

3 Sealing tape

4 Stapler

5 Folding rule

6 Wooden board

7 Cutting underlay

8 Knife

9 Cutting rail

The right insulation wedges

Thickness (mm) Length x width (mm) Area (m2)
Insulation wedge 035
100  1000 x 6253.125
120 1000 x 625  2.500
140 1000 x 625  1.875
160 1000 x 625  1.875
180 1000 x 625  1.875
200 1000 x 625  1.250
220 1000 x 625  1.250
240 1000 x 625  1.250
Insulation wedge 040
140 1000 x 625  2.500
160 1000 x 625   1.875
180 1000 x 625   1.875 
200 1000 x 625   1.875
220 1000 x 625   1.875
240 1000 x 625   1.250

The insulation material

Mineral wool is most frequently used as an insulation material. Insulation material rolls and wedge-shaped panels are easy to work with. These can be aligned to the respective rafter clearance.