Definition of SN 564271-1:2025

SN 564271-1:2025 is a standard published by the Swiss Association for Standardization (SIA) that specifies the requirements for waterproofing interior spaces in buildings. It provides comprehensive guidelines focused on design and execution to ensure durability and effectiveness in moisture control.

Purpose and objectives

The primary purpose of SN 564271-1:2025 is to establish clear criteria for the design and execution of waterproofing systems within buildings. This standard aims to protect interior spaces from moisture ingress, thereby enhancing the longevity of structural elements and improving indoor air quality. By adhering to these guidelines, builders and contractors can ensure that waterproofing solutions are both effective and compliant with established norms, ultimately reducing repair costs and enhancing user satisfaction.

Scope: who must comply

SN 564271-1:2025 applies to various stakeholders in the construction industry, including architects, contractors, and building material manufacturers. It is particularly relevant for professionals involved in designing and constructing residential and commercial buildings where waterproofing is critical. Compliance with this standard is essential for ensuring that interior spaces remain dry and functional, especially in regions prone to high humidity and moisture.

How SN 564271-1:2025 relates to other standards

SN 564271-1:2025 is part of a broader framework of standards related to building construction. It is closely related to:

• SIA 271: Standards for building construction that outline general requirements, including structural integrity.
• SIA 118/271: Provides execution guidelines for various construction processes, including waterproofing.
• SIA 272, 273, 274: These standards focus on specific materials and methods applicable to building insulation and moisture control.

Revision history and current status

The current version of SN 564271-1 was published in 2025, reflecting the latest advancements in waterproofing technologies and materials. The recent revision includes updated guidelines on material specifications and execution techniques to better address modern construction challenges. This ensures that the standard remains relevant and effective in promoting best practices in waterproofing.