cement render
Enable an agent to recognise cement render, assess its suitability and condition on a particular substrate, and identify evidence needed before application, finishing or repair.
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 18 findings · 28 questions
Render identity and mix Establishes what the cement render record represents and which formulation it concerns.
Material boundary
Locates the record within cement-bound surface mortars.
Cement-bound surface coat
Record binder evidence and intended surface-coating use rather than relying on the word render alone.
- What evidence identifies cement as a binder in this render? definition
- Does this record describe a render formulation, a mixed batch or an installed coating? boundary
Formulation and batch
Captures the specified ingredients and the actual preparation of a batch.
Traceable render recipe
Keep product declarations or site-mix proportions linked to actual material quantities and additions.
- Which product document or site specification identifies the cement, aggregate, lime and additives? provenance
- What proportions and water additions were used, and were the proportions measured by mass or volume? measurement
Substrate and interfaces Describes how the render is supported, bonded and detailed at changes in the wall.
Receiving surface
Records the substrate properties and preparation relevant to attachment.
Substrate readiness
Assess the actual receiving surface for soundness, contamination, suction and the preparation required by the selected render system.
- What substrate receives the render, and what evidence records its soundness, cleanliness and suction? measurement
- What preparation, wetting, key or bonding treatment does the selected system require on this surface? action
Movement and terminations
Locates joints, material transitions, openings and exposed edges.
Render interface details
Record where render crosses or terminates at interfaces and what joint, bead or reinforcement detail is specified.
- Where do substrate changes, movement joints, openings and render edges occur? boundary
- Which details govern reinforcement, joint continuity and termination at each interface? provenance
Coat application and curing Tracks the construction of the render build-up and its early protection.
Coat sequence
Records each coat's role, thickness, surface preparation and application time.
Specified and applied build-up
Compare the actual sequence and thickness of coats with the chosen render specification.
- What coats were specified and applied, and what thickness was measured for each? measurement
- What evidence establishes that the preceding coat was ready and suitably prepared for the next coat? action
Early-age conditions
Records weather, protection and curing during application and hardening.
Curing and finish readiness
Base protection and subsequent finishing decisions on documented conditions and applicable product or project requirements.
- What temperature, sun, wind and rain conditions accompanied application, and what curing or protection was provided? provenance
- Which criteria must be met before this render receives its intended paint or other finish? action
Service performance Connects exposure and intended surface function to evidence about render performance.
Water and drying
Addresses rain exposure, absorption and moisture movement through the coated wall.
Moisture compatibility
Record moisture-related requirements and evidence without assuming the render alone provides a waterproof barrier.
- What water exposure and drying requirements apply at this location? boundary
- What declared or measured absorption and vapour-transmission evidence supports the proposed wall and render combination? measurement
Surface and mechanical duty
Defines the required finish and resistance to the demands of the installation.
Render acceptance criteria
Keep requirements for texture, evenness, bond and mechanical performance tied to the relevant specification and assessment method.
- What texture, evenness and visible-finish criteria define an acceptable rendered surface here? definition
- Which bond or mechanical-performance requirements apply, and how are they assessed? measurement
Defects and repair Supports evidence-based assessment of deteriorated render and compatible intervention.
Condition investigation
Separates observed defects from hypotheses about their origin.
Mapped render distress
Locate and document cracking, hollow areas, detachment, salt deposits and surface loss before assigning a cause.
- Where are defects located, how extensive are they, and what dated measurements or inspection records describe them? measurement
- What evidence distinguishes deterioration within the render from movement, moisture or failure originating in the substrate? boundary
Intervention selection
Defines the evidence needed to retain, repair or replace affected render.
Compatible render repair
Evaluate repair extent, material compatibility and unresolved causes before specifying a patch or replacement.
- What evidence supports retaining, locally removing or replacing the affected render? action
- How will the repair's strength, moisture behaviour, thickness and texture be checked against the existing render and substrate? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these check these first hold for the sense of cement render this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these kinds and varieties hold for the sense of cement render this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these standards and regulation hold for the sense of cement render this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these real-world use hold for the sense of cement render this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these typical measurements hold for the sense of cement render this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these failure modes and hazards hold for the sense of cement render this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these regional variation hold for the sense of cement render this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of cement render this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Information and virtual systems
- Entry kind
- thing
- Plane
- INF
- Domain
- INF.MED
What it is Filled
Cement render is a cement-bound mortar, usually containing sand, water and sometimes lime or other additives, applied to a wall substrate to form a protective or decorative coating.
In scope
- Cementitious binder, aggregate, additives and mixing water
- Render coats, thicknesses, textures and reinforcement
- Substrate compatibility, preparation and adhesion
- Application, curing and readiness for subsequent finishes
- Installed condition, deterioration and repair compatibility
Out of scope
- Structural design and condition of the supporting wall
- Concrete used as a structural or cast building element
- Mortar used principally to bed or joint masonry
- Pure lime render, gypsum plaster and non-cement-bound textured coatings
- Paints, membranes and insulation systems except at their interfaces with render
Why it exists Filled
Enable an agent to recognise cement render, assess its suitability and condition on a particular substrate, and identify evidence needed before application, finishing or repair.
Distinguishing features Filled
- Cement provides a material part of the binder, although lime, polymers or other additions may also be present.
- The mortar is spread over a substrate as a surface coat rather than primarily placed between masonry units or cast as a structural member.
- The term can denote either an unapplied render mix or its hardened coating; an agent must identify which state the record describes.
- A cement-bound base coat remains distinct from any separately applied paint, decorative coating or waterproofing membrane.
- The distinction from cement plaster can depend on regional terminology and intended location, so the name alone is insufficient.
What robots and AI may and may not do Filled
Must not
- Recommend cement render on historic or lime-based walls without noting the risk of trapping damp.
- Expose workers to wet cement or cement dust without skin, eye and breathing protection.
- Approve render work on a listed or protected building without the required consent.
Only with a human decision
- Approving render work on a protected building or one with structural cracking.
May
- Describe cement render, its uses and its compatibility with different wall types.
- Inspect and report cracking, damp or detachment of render on buildings it is authorized to survey.
Moral aspects Filled
- Wet cement burns skin and dust harms lungs; workers need protection.
- Wrong render can damage historic buildings that belong to the shared heritage.
Who is affected
- Construction workers
- Building owners
- Occupants
Owners Filled
Steward
The owner of the building; heritage authorities where the building is protected.
Links to other meta-models Filled
parent
- Q572879 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.cement-render
- Wikidata: Q3776631 (https://www.wikidata.org/wiki/Q3776631)
Direct properties not applicable Not applicable
- Material or installation identity: product formulation | site mix | mixed batch | applied coat | complete render build-up
- Binder and aggregate composition: Cement type; lime and other additions; aggregate type and grading; declared proportions with mass or volume basis
- Mixing-water addition: L per bag or batch, with dry-material quantity and any later water additions recorded
- Supporting substrate: Linked masonry, concrete, existing render or approved carrier, including preparation and observed condition
- Coat build-up: Number and role of coats; thickness in mm per coat and overall; measurement location and method
- Application and curing stage: dry | freshly mixed | applied | curing | ready for specified finish | in service; timestamps and supporting evidence
- Exposure: Interior or exterior; rain, splash, ground contact, salts and freeze-thaw exposure where relevant
- Bond condition: unassessed | apparently bonded | suspect hollow areas | locally detached | extensively detached; inspection or test evidence
- Crack geometry and activity: Width in mm, extent and pattern, with dated observations of change
- Moisture-related performance: Declared or tested water absorption and vapour transmission, with units, method and specimen condition
Plane INF: no invented physical properties.
Recognition optional Filled
- Exposed cement render commonly has a mineral, sand-textured surface that may be floated smooth or left rough.
- Chipped edges can reveal a distinct mortar coating over masonry or concrete rather than a solid concrete wall.
- Unpainted material is often grey, although pigments and finishes make color alone unreliable for identification.
Capabilities and actions required Filled
- Compare a proposed render mix and coat system with the substrate and exposure requirements.
- Record mixing, preparation, application and curing evidence against the specified procedure.
- Identify missing evidence before authorising another coat or surface finish.
- Map cracks, hollow areas, detachment, staining and surface loss for investigation.
- Compare repair options for compatibility with the existing render and supporting wall.
Hazards and failure modes required Filled
- Wet cement render can cause alkaline skin burns and serious eye injury.
- Dust from hardened render can contain respirable crystalline silica and damage the lungs.
- Poor adhesion or deterioration can allow render to detach and injure people or damage property.
- An incompatible or overly rigid coating can retain moisture and contribute to deterioration of the underlying wall.
Standards and interfaces required Filled
- EN 998-1, issued by the European Committee for Standardization, specifies requirements for factory-made rendering and plastering mortars within its scope.
- ASTM C926, issued by ASTM International, specifies the application of Portland cement-based plaster.
Context of use required Filled
- Cement render is used on suitable masonry and concrete walls to provide a protective or decorative surface.
- It is encountered in exterior facades, interior finishes and repair work where compatibility with the substrate and moisture conditions matters.
Sources Filled
- Wikidata item Q3776631: cement render - identity and sense of the item
- Wikipedia: Cement render - general description of the item
Open questions
- Does the registry intend the construction-material sense of cement render, and should its INF / INF.MED assignment be corrected or explicitly explained?
- Which regional definitions distinguish cement render from cement plaster, stucco and cement-lime render for this registry?
- Does an existing Vercy world model already own cement render or a broader render concept to which this entry should link?
- Which primary technical sources and applicable standards establish performance categories and acceptance methods for the intended jurisdictions?
- Where should the boundary fall for proprietary polymer-modified renders and render coats supplied as part of external insulation systems?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q3776631/spec.json