PMT non-penetrating mounting system for pitched roofs

PMT FLAT DIRECT – doesn’t work, not possible

PMT FLAT DIRECT is the ideal photovoltaic mounting system for gable, monopitch, sawtooth, barrel or butterfly roofs. With this system, solar power systems can be attached on bitumen roofs as well as on foil and sandwich solar panels. The PV substructure is great as a non-penetrating solution for roof inclinations of up to 30°.
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Flat direct

Wide range of applications

From bitumen roofs to foil or sandwich solar panels – This PV substructure features a universal range of applications for gable, monopitch, sawtooth, barrel or butterfly roofs.
technical data


The ridge coupling or ridge connection make it possible to install the system without making holes in the roof. The system provides maximum safety for roof inclinations of up to 30°.


With the PMT FLAT DIRECT, PMT offers safety as well as flexibility. In addition to the variable range of applications, the primary advantages of non-penetrating installation and system stability speak for themselves. Discover more highlights of the PMT FLAT DIRECT mounting system.

The all-rounder of our PV mounting systems

Ballast fastening

Ballasting made easy

The WTG wind tunnel certificate confirms the optimal ballasting of the system. The ballast is securely fastened with the universal solar panel ballast clamp.

Variable range of applications

Always ready to use

The PV mounting system can be installed without penetrations. This makes it suitable for roof segments such as gable, monopitch, sawtooth, barrel, and butterfly roofs. Moreover, it is a proven solution for foil, sandwich-solar panel, and bitumen roofing materials.

Properly mount the solar panels

Watch out for this

The system holds the areas of the clamps to the most common solar panels. This keeps the drainage opening clear. A low-resistance solar panel grounding is possible.

Integrated cable management

Hassle-free and safe

Thanks to an integrated cover, the cables become invisible immediately after installation. This makes it easier to route the cables and prevents obstructions.

Flexible height

Independent fastening

The universal attachment covers clamp areas of 30 to 50 mm. The makes using them more flexible and also makes planning quicker.

Continuous floor rail

Optimal installation

The floor rail is continuous and provides an optimal contact surface.

Accessories up on request

Your benefit

Does your planning require any further extras? At PMT, we provide the right accessories for you right away. We are happy to provide consultation for you on the right roof connection points.

Technical data
Application type
Pitched-, pent-, shedroof
(Special projects possible)
Roof inclination
0° to 30°
Roof covering
Film, bitumen, concrete, sandwich
Standard spacing
Module lenght X + 160 mm from module edge to module edge
(Special projects possible)
Details are to be found in the project report.
Low surface load from 1,25 kg/m²
ca. 10,7 kg/m² substructure + module
Roof connection
Possible without roof penetration
Minimum arrangement
2 rows à 3 modules
3 rows à 2 modules
Exclusively high-quality aluminium
EN-AW-6063-T3 and stainless steel A2-70.
No galvanised components or plastics are used.
PV module suitability
All standard PV module sizes:
Width: 980 – 1050 mm (1220 mm*)
Length: 1630 – 1870 mm (2110 mm*)
Height: 30 – 50 mm

*on request
Ground rail
Ground rail
Mounting profile
Mounting profile
FD MS Typ 3150
FD MS Typ 4250
FD MS Typ 6200
Mounting profile connectorr
Mounting profile connector
FD MSV Typ 300
Ground rail connector
Ground rail connector
FD BSV Typ 390
Cross profile connector
Cross profile connector
FD KV Typ 35
MK Typ 40
EK Typ 35
Available with different coatings adapted to the roofing membrane.
Mounting profile Solmont
Mounting profile Solmont
FD FA Typ 3300
Ridge connector
Ridge connector
FD FV Typ 750
FD FV Typ 1300
FD FV Typ 1000
Cabel duct cover
Cabel duct cover
FD KD Typ 385
Assembly instructions PMT FLAT DIRECT
(1.62 MB)
to the download
I have a question regarding this product.
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Stefanie Weickert
Head of Internal Sales
project@pmt.solutions contact now


Frequently asked questions

What attachment options are available for the FLAT DIRECT?

  • Coupling of symmetrical system components over the high point of the roof
  • Coupling over the high point of the roof – in this case the opposite side is only formed with ballast
  • One-sided installation using mechanical fasteners over the ridge (e.g. sawtooth roof) or fastening in the ridge area

What roof covering can the PMT FLAT DIRECT be mounted on?

PMT FLAT DIRECT is the ideal photovoltaic mounting system for all roof coverings. It can be attached on all types of foil roofs, bitumen, all types of hard roofs (concrete, gravel and similar materials) and on insulated trapezoidal sheets (sandwich solar panels) without making any penetrations.

What types of roof can the PMT FLAT DIRECT be mounted on?

Our photovoltaic substructure can be mounted on almost all conventional roof types. From gable and sawtooth roofs to butterfly roof, many different types of roofs are possible. Special roof shapes like barrel roofs and others should generally be requested.

What solar panel dimensions are possible?

With our standard FLAT DIRECT upright mounting system, solar panels with a maximum width of 1,050 mm and a maximum length of 2,110 mm can be mounted.
With a solar panel width of between 1,050 mm and 1,220 mm, the maximum possible solar panel length is 1,870 mm.

Can I mount the solar panels cross-wise?

Special projects are reviewed by our internal sales team and by our planning department on request. If the project is possible, it will be planned and an offer will be made.

Must I maintain the gap between the solar panels?

It is essential that the gap between the solar panels is maintained. This is a decisive factor in the aerodynamics of the system and has a significant effect on the ballasting.

Can stones of other dimensions also be used?

Theoretically, stones of any weight can be used in the planning. Please note that our software PMT Plan uses 15-kg ballast stones of 40 x 40 x 4 cm by default. If you plan to use other stones, the thickness or height of the stones must not exceed 4 cm.

Where is the ballast positioned?

The ballast is attached to the system’s base rails in accordance with the project-specific ballast plan.

Can the system be attached to existing attachment points?

No. Personal safety attachment points or fastening points on the roof are not suitable for carrying permanent loads.

Is thermal separation necessary?

We recommend a separation after 13 metres. Special projects are possible after discussion with PMT.

Is it possible to put a coupling near the eaves?

Special projects are reviewed by our internal sales team and by our planning department on request. If a coupling can be implemented, it will be planned and an offer will be made.

Why weren’t any 96-cm rails delivered; instead, only rails with a length of 1860 mm were delivered?

The solar panel rails are delivered in various standard lengths and must be cut to length on site. To do this, please refer to the rail and cutting plan in the project report.

Is there a maximum field size, particularly with coupled systems over ridges?

We recommend a maximum field size of 13 x 13 metres. Special projects are possible after discussion with PMT.

What should be considered for coupled systems in light strip areas?

These kinds of projects must be fastened during installation.
3D Model


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