What is Montagefix?
Montagefix are slotted packing shims. The shim is simply slid onto the screw, nail or wall plug via the slot, without having to remove the fixing first. The screw is then tightened and the shim is held firmly. This allows a substructure to be aligned point by point while it is already loosely fixed.
Montagefix is impact-resistant, can be nailed and cut to size, and remains dimensionally stable even with changing temperatures and humidity.
Two formats, colour-coded by thickness
Montagefix large 77 × 48 mm
| Thickness | Colour | Contents |
|---|---|---|
| 1 mm | white | 1,000 / carton |
| 2 mm | blue | 1,000 / carton |
| 3 mm | red | 1,000 / carton |
| 4 mm | black | 1,000 / carton |
| 5 mm | green | 1,000 / carton |
| 10 mm | black | 500 / carton |
Montagefix small 60 × 45 mm
| Thickness | Colour | Contents |
|---|---|---|
| 1 mm | white | 1,000 / carton |
| 2 mm | blue | 1,000 / carton |
| 3 mm | red | 1,000 / carton |
| 4 mm | yellow | 1,000 / carton |
| 5 mm | green | 1,000 / carton |
| 10 mm | brown | 500 / carton |
Note: the colour code applies per format. At 4 mm, for example, the large shim is black and the small one yellow.
Aligning battens: step by step
- Fix the batten loosely: Insert the screws but do not tighten them yet, so that there is room for the shims behind the batten.
- Set the line: Stretch a string line or use a laser or straightedge to determine the target plane.
- Fit Montagefix: At each fixing point, slide the right thickness onto the screw via the slot. For larger gaps, combine several shims.
- Tighten and check: Tighten the screws and check the plane. Add a thin shim if necessary.
Typical applications
- Façade construction: Bring battens and counter battens for rainscreen façades into one plane.
- Interior fit-out and drywall: Align substructures for wall and ceiling linings.
- Window construction: Level frames and junctions at the fixing points.
- Heating and plumbing: Bring brackets and holders on uneven walls plumb.
Assortments for the site
Montagefix large is available mixed in the assortments MINI 64, MID 125 and MIX 250, Montagefix small in the assortment MIX 256. For dealers there are also self-service retail bags in a sales carton.
Frequently asked questions
Do I have to remove the screw to fit Montagefix?
No. The shim is slid via the slot onto the loosely inserted screw, nail or wall plug. The fixing is then tightened.
Which thicknesses are available?
Both formats are available in 1, 2, 3, 4, 5 and 10 mm. Several shims can be combined to reach the required thickness.
Can Montagefix be cut to size?
Yes, Montagefix can be nailed and cut to size, so it can be adapted to narrow supports.
What is the difference between Montagefix large and small?
Montagefix large measures 77 × 48 mm and is the standard format. Montagefix small measures 60 × 45 mm and is suitable for narrow supports. The colour code differs between the formats.
These notes are general guidance from practice. The applicable regulations, the specifications of the window or system manufacturers and the project-specific planning are authoritative.

