DIN 4109-33:2026-09 - Draft

What is DIN 4109-33 about?

DIN 4109 is the central series of standards for sound insulation in buildings. Depending on the part, it covers requirements, calculation-based verification methods or technical principles for the acoustic planning and assessment of buildings.

DIN 4109-33 contains component data for timber, lightweight and drywall construction and provides acoustic characteristic values for calculation-based verification according to DIN 4109-2. It supports the acoustic assessment of building components and constructions and serves as a basis for planning and verifying structural sound insulation in the corresponding construction methods.

What content does the standard cover?

DIN 4109-33 includes acoustic characteristic values, construction data and calculation approaches for components used in timber, lightweight and drywall construction. It supports the determination of airborne and impact sound insulation as well as the assessment of sound transmission within buildings.

Topics covered at a glance:

• Timber construction systems and drywall systems
• Timber frame, timber panel and timber skeleton construction methods
• Lightweight walls, partition walls and wall linings
• Timber floors and lightweight floor constructions
• Airborne and impact sound insulation of building components
• Flanking transmission and component connections
• Acoustic characteristic values for timber, lightweight and drywall constructions
• Data for calculation-based verification according to DIN 4109-2

Why is the standard relevant in practice?

DIN 4109-33 provides planners, building physicists and sound insulation experts with the necessary component data for sound insulation verification in timber, lightweight and drywall construction. This enables constructions to be acoustically assessed and optimized as early as the planning phase.

The characteristic values included for walls, floors, lining constructions and component connections are particularly relevant. The standard therefore forms an important basis for standards-compliant planning and calculation-based verification of sound insulation in modern lightweight constructions.

What changes have been made compared with the previous edition?

Compared with DIN 4109-33:2016-07, the draft has been revised and updated. The most important changes include:

• Revision and addition of acoustic characteristic values and component data
• Updating of construction details and calculation bases
• Adjustment of data for timber, lightweight and drywall constructions
• Updating of normative references and technical principles
• Editorial revision of the document

Target group

• Architects
• Civil engineers
• Specialist planners for building physics
• Sound insulation experts
• Timber construction planners
• Inspection engineers
• Planning and engineering offices in building construction

Supplementary standards in the DIN 4109 series

Depending on the application, further parts of the DIN 4109 series of standards may be relevant for holistic planning of structural sound insulation. These include requirements for sound insulation, calculation-based verification methods and component catalogues for solid construction, building services installations and other building constructions.