Specification for mortar for masonry - Part 3: Rendering and plastering mortar with organic polymer binding agents

This European Standard is applicable to mortar containing organic polymer binding agents as the principal binder used for external rendering and internal plastering. It contains definitions, applications properties and final performance requirements. Fire resistant and acoustical mortars, mortars for structural repair and surface treatments of building elements such as materials for smoothing or trueing, paints or similar coatings and prefabricated units (e.g. plaster boards) are not dealt within this standard.

Specifikacije malt za zidanje – 3. del: Proizvodi na osnovi organskih veziv za zunanje in notranje omete

General Information

Status
Not Published
Technical Committee
CEN/TC 125 - Masonry
Drafting Committee
CEN/TC 125/WG 2 - Mortar
Current Stage
1099 - Decision on WI proposal - Accept - Evaluation of concrete proposal
Due Date
20-Oct-2000
Completion Date
20-Oct-2000
Ref Project
oSIST prEN 998-3:2006 - Specification for mortar for masonry - Part 3: Rendering and plastering mortar with organic polymer binding agents

Overview

prEN 998-3 - Specification for mortar for masonry, Part 3 - is a CEN draft standard that defines requirements for rendering and plastering mortar with organic polymer binding agents. It applies to mortars that use organic polymer binders as the principal binder for external rendering and internal plastering. The standard provides definitions, application properties and final performance requirements to ensure fit-for-purpose behavior of polymer-modified mortars used on building façades and interior surfaces.

Key Topics

  • Scope and definitions: Clarifies which materials and products are covered and which are excluded (for example, fire‑resistant and acoustical mortars, structural repair mortars, surface treatments such as paints or smoothing materials, and prefabricated units are not covered).
  • Application properties: Describes performance characteristics that relate to application and use in rendering and plastering (e.g., suitability for external and internal environments, compatibility with common substrates).
  • Final performance requirements: Establishes the expected outcomes for finished mortars so manufacturers and specifiers can assess compliance and durability.
  • Classification and labeling: Requirements to support clear product information for specifiers, contractors and compliance bodies.

(As a CEN document, prEN 998-3 focuses on harmonized terminology and practical performance requirements rather than prescribing proprietary formulations.)

Applications

prEN 998-3 is intended for use where organic polymer-based rendering and plastering mortars are specified or manufactured:

  • External renders on building façades where polymer-modified mortars are preferred for flexibility and adhesion
  • Internal plasters in residential, commercial or institutional buildings
  • Project specification and procurement documents that require standardized performance criteria
  • Product declarations, technical datasheets and conformity assessment for construction products

Who uses this standard

  • Manufacturers of polymer-modified mortars for product development and CE marking preparation
  • Architects and specifiers choosing appropriate renders and plasters for building envelopes and interiors
  • Contractors and applicators ensuring correct selection and installation practices
  • Testing laboratories and certification bodies verifying compliance with defined performance requirements
  • Regulators and building authorities referencing harmonized European specifications

Related standards

prEN 998-3 is part of the EN 998 family covering mortar for masonry; related parts address other mortar types and general requirements for masonry mortars. Refer to the EN 998 series for complementary specifications and harmonized test frameworks.

Keywords: prEN 998-3, specification for mortar, rendering and plastering mortar, organic polymer binding agents, mortar for masonry, CEN standard, external rendering, internal plastering.

Frequently Asked Questions

prEN 998-3 is a draft published by the European Committee for Standardization (CEN). Its full title is "Specification for mortar for masonry - Part 3: Rendering and plastering mortar with organic polymer binding agents". This standard covers: This European Standard is applicable to mortar containing organic polymer binding agents as the principal binder used for external rendering and internal plastering. It contains definitions, applications properties and final performance requirements. Fire resistant and acoustical mortars, mortars for structural repair and surface treatments of building elements such as materials for smoothing or trueing, paints or similar coatings and prefabricated units (e.g. plaster boards) are not dealt within this standard.

This European Standard is applicable to mortar containing organic polymer binding agents as the principal binder used for external rendering and internal plastering. It contains definitions, applications properties and final performance requirements. Fire resistant and acoustical mortars, mortars for structural repair and surface treatments of building elements such as materials for smoothing or trueing, paints or similar coatings and prefabricated units (e.g. plaster boards) are not dealt within this standard.

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Standards Content (Sample)


SLOVENSKI oSIST prEN 998-3:2006

PREDSTANDARD
september 2006
Specifikacije malt za zidanje – 3. del: Proizvodi na osnovi organskih veziv za
zunanje in notranje omete
Specifications for mortar for masonry - Part 3: Products for external rendering and
internal plastering based
...

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