SIST EN 1015-19:1999
(Main)Methods of test for mortar for masonry - Part 19: Determination of water vapour permeability of hardened rendering and plastering mortars
- Abstract
This European Standard specifies a method for determining the steady state water vapour permeability of rendering and plastering mortars in accordance with prEN 998-1 at the upper and lower part of the hygroscopic range. The test method is applicable to mortars from which disc shaped specimens of uniform thickness between 10 mm and 30 mm can be made.
- Status
- Published
- Publication Date
- 31-Dec-1998
- Withdrawal Date
- 31-Jan-2001
- Technical Committee
- CAA - Mineral binders and masonry
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Jan-1999
- Due Date
- 01-Jan-1999
- Completion Date
- 01-Jan-1999
SIST EN 1015-19:1999 is the Slovenian standard for a laboratory test method in the masonry mortar series, adopted from EN 1015-19:1998. It specifies how to determine the steady state water vapour permeability of hardened rendering and plastering mortars, for use with mortars in the context of prEN 998-1 and for specimens that can be made as uniform discs 10 mm to 30 mm thick.
What does SIST EN 1015-19:1999 specify?
SIST EN 1015-19:1999 specifies a test method for a specific moisture-transport property of hardened rendering and plastering mortars. In practice, it is the document you use when you need a reproducible laboratory result for water vapour permeability rather than a general description of mortar performance.
The scope limits the method to mortars from which disc-shaped specimens of uniform thickness between 10 mm and 30 mm can be prepared. That matters because the test depends on specimen geometry, so a material that cannot be formed into that shape and thickness is outside the stated use.
The scope also places the method in relation to prEN 998-1 and says the property is determined at the upper and lower part of the hygroscopic range. For users, that means the result is intended for rendering and plastering mortars and for moisture-related performance assessment over the range where the material exchanges water vapour with its surroundings.
What are the key requirements of SIST EN 1015-19:1999?
The property measured is steady state water vapour permeability.
The test is not about short-term absorption or a general moisture rating. In practice, users need a stable test condition before taking the result, because the method is aimed at a steady vapour flow through the specimen.The material is hardened rendering and plastering mortar.
The standard is for mortars after hardening, not for fresh mixes. This matters for quality control and product comparison, because the test reflects the finished material as it will perform in service.The method applies in the context of prEN 998-1.
The scope ties the test to rendering and plastering mortars covered by that product framework. In practice, the result supports technical characterization and product documentation for those mortars.Specimens must be disc-shaped and of uniform thickness.
The standard applies only where specimens can be prepared as discs. That keeps the diffusion path consistent, which is important for comparing results between products and laboratories.Specimen thickness must be between 10 mm and 30 mm.
This thickness window is part of the applicability of the method. Users need to prepare or select specimens within that range before testing.The method addresses the upper and lower part of the hygroscopic range.
That means the test is relevant where the mortar is exchanging moisture with air under hygroscopic conditions. For the reader, this is the part of performance that matters for drying, moisture buffering, and vapour transmission through wall finishes.
What terms does SIST EN 1015-19:1999 define?
- Water vapour permeability - the ability of the hardened mortar to let water vapour pass through it.
- Steady state - a test condition where vapour flow has stabilized and measurements are taken after that point.
- Rendering and plastering mortars - mortars used as external rendering or internal plaster finishes.
- Hygroscopic range - the moisture range where the material exchanges vapour with the surrounding air.
- prEN 998-1 - the referenced product context for rendering and plastering mortars.
- Disc-shaped specimens - round test pieces prepared to the geometry required by the method.
Who uses SIST EN 1015-19:1999?
SIST EN 1015-19:1999 is used by testing laboratories, mortar manufacturers, and quality managers who need a standard laboratory method for vapour permeability. It is also relevant to specifiers and buyers who compare rendering and plastering mortars on a technical basis, and to product developers who need measured data for formulation work and documentation.
What changed in SIST EN 1015-19:1999 from the previous edition?
SIST EN 1015-19:1999 is the Slovenian adoption of EN 1015-19:1998 and is stated as identical to that European Standard.
Which standards are used with SIST EN 1015-19:1999?
- prEN 998-1 - provides the product context for the rendering and plastering mortars to which this test method applies.
What does the SIST EN 1015-19:1999 document contain?
The document contains the laboratory method for determining water vapour permeability in hardened rendering and plastering mortars. It is a test-method standard, so its value is in the way it defines the property to be measured and the specimen form needed for a valid result.
For users, the document supports consistent testing of mortar discs within the stated thickness range and in the stated hygroscopic conditions. That makes it suitable for product characterization, technical files, and comparisons between materials tested to the same method.
Relations
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Referred By
SIST EN 998-1:2010 - Specification for mortar for masonry - Part 1: Rendering and plastering mortar - Effective Date
- 28-Jan-2026
- Referred By
SIST EN 998-1:2017 - Specification for mortar for masonry - Part 1: Rendering and plastering mortar - Effective Date
- 28-Jan-2026
- Effective Date
- 22-Dec-2008
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Frequently Asked Questions
SIST EN 1015-19:1999 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Methods of test for mortar for masonry - Part 19: Determination of water vapour permeability of hardened rendering and plastering mortars". This standard covers: This European Standard specifies a method for determining the steady state water vapour permeability of rendering and plastering mortars in accordance with prEN 998-1 at the upper and lower part of the hygroscopic range. The test method is applicable to mortars from which disc shaped specimens of uniform thickness between 10 mm and 30 mm can be made.
This European Standard specifies a method for determining the steady state water vapour permeability of rendering and plastering mortars in accordance with prEN 998-1 at the upper and lower part of the hygroscopic range. The test method is applicable to mortars from which disc shaped specimens of uniform thickness between 10 mm and 30 mm can be made.
SIST EN 1015-19:1999 is classified under the following ICS (International Classification for Standards) categories: 91.100.10 - Cement. Gypsum. Lime. Mortar. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 1015-19:1999 has the following relationships with other standards: It is inter standard links to SIST EN 1015-11:2020, SIST EN 1015-3:2001, SIST EN 1015-2:1999, SIST EN 998-1:2010, SIST EN 998-1:2017, SIST EN 1015-19:1999/A1:2004. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 1015-19:1999 is associated with the following European legislation: EU Directives/Regulations: 305/2011, 89/106/EEC; Standardization Mandates: M/116. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN 1015-19:1999 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
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