Construction products detail

Fixings bonded to the roof waterproofing

For penetration-free fixing of photovoltaic systems or fall protection to the roof, the fixings can be bonded or welded to the roof waterproofing membrane. The roof waterproofing thus takes on a structural role in the transfer of loads, for which it is not designed. As a matter of fact, the roof waterproofing as such is not a load-bearing element. Furthermore, there are no generally recognised design values for welded or bonded joints.

Regulatory framework

There are no conclusive technical rules for fixings bonded to the roof waterproofing.

Therefore, DIBt grants national technical approvals (abZ) for the corresponding products in combination with a general construction technique permit (aBG) for the design and execution.

The regulatory provisions set out that the systems and elements must be secured against falling due to wind action. If the systems are secured against uplift by ballasting, they may be secured against falling as a result of horizontal displacement by constructive means – e.g. through installation of a parapet or planks at the edges or through back-ties to components subject to uplift forces.

National procedure

A national technical approval (abZ) and/or oder general construction technique permit (aBG) is granted upon application (see Model Building Code (MBO), Sections 16a(2) and18(2) and (4)). This also applies to amendments and supplements to, or renewals of existing approvals and/or construction technique permits.

No formal requirements apply. The following information is needed: name and address of the applicant, description of the product and/or construction technique and its field of use or application, type of decision required (new decision, amendment or supplement to, or renewal of, an existing decision).

Please feel free to use the template below.


new decision
valid until
Subject concerned Applicant Decision no. Validity
from / to
RENOLIT-ALKORSOLAR Befestigungssystem für Solaranlagen zur Verwendung auf ALKORPLAN F 35176 - Dachabdichtungsbahn RENOLIT Belgium N.V Industriepark de Bruwaan 9700 OUDENAARDE BELGIEN Z-72.1-1 Z: 27.02.2020
G: 12.12.2024
SUNOVA Befestigungssystem für Solaranlagen auf mechanisch befestigten Dachabdichtungen Gehrlicher Solar Connect GmbH Feldkirchener Straße 2 85540 Haar b. München Z-72.1-15 Z: 11.07.2022
G: 11.07.2027
Befestigungssystem "Sika SolarMount-1 (SSM1)" für die Solarmodulbefestigung auf Dachabdichtungen Sika Deutschland GmbH Kornwestheimer Straße 103-107 70439 Stuttgart Z-72.1-2 Z: 29.06.2020
G: 29.06.2025
SOFLATECH PV-EPS-Trägersystem zur Befestigung von Solaranlagen auf Dachabdichtungsbahnen Soflatech GmbH Ikarusallee 16 30179 Hannover Z-72.1-3 Z: 05.07.2023
G: 27.07.2028
ABS Lock OnTop Max - Anschlageinrichtung, verschweißt auf der Dachabdichtung zum Anschlagen einer persönlichen Schutzausrichtung ABS Safety GmbH Gewerbering 3 47623 Kevelaer Z-72.2-4 Z: 21.06.2019
G: 21.06.2024