Describe the location, pattern and history. Leave the cause and repair method for assessment.
A small vocabulary for a better repair request
CGC’s Canadian installation guide treats flat panel joints, inside angles, exterior corner accessories and fastener heads separately during finishing. These terms describe where work occurs; they do not establish why an existing defect has appeared.
Source: CGC / USG
| Detail | What to describe |
|---|---|
| Flat joint | A line or ridge across an otherwise flat wall or ceiling; note its direction and length. |
| Inside corner | The inward angle where two surfaces meet; identify both surfaces. |
| Outside corner | An exposed outward edge, such as the edge of a wall return; note impact history. |
| Fastener area | An isolated round mark or repeated small marks; note their spacing without probing. |
| Opening or trim edge | A defect beside a door, window, fixture or trim; include a wider photograph. |
Record the pattern and what has changed
- Identify the room and whether the detail is on a wall or ceiling.
- Note whether there is one defect or several following a line.
- Give the approximate extent and first observation date.
- Say whether the area was repaired before and when the mark returned.
- Record known impact, nearby renovation or moisture history without assuming it caused the defect.
- Share an older photograph if it helps show a change.
Use consistent photographs to explain a change over time. An overview helps locate the defect; a closer view helps describe it. Avoid pressing, pulling or opening material to make the picture more conclusive.
Ask what must be resolved before filling
For a recurring defect, ask whether the proposal addresses a surface treatment, an attachment issue or a condition requiring another professional’s assessment. Request a clear explanation of what the repair can reasonably address and what remains outside its scope.
| Observation | Question to resolve |
|---|---|
| The same line has returned | What needs investigating before another cosmetic repair? |
| An outside edge was hit | Which damaged material or accessory needs assessment, and how wide is the finish boundary? |
| Several small marks have appeared | What is the proposed method after assessing the affected area? |
| Staining or loose material is also present | Which condition needs attention before a finishing scope can be agreed? |
Keep the repair description separate from the guarantee
Ask the estimate to identify the treated area, adjoining finish, primer and paint responsibilities, and any excluded investigation. If the underlying cause remains unresolved, record that uncertainty rather than accepting a general promise that every crack will be permanently eliminated.
Coquitlam: ask the right question before another cosmetic repair
Coquitlam provides inspector contact information for questions about building work.
Source: City of Coquitlam
When a recurring mark relates to an active permitted alteration, ask the project lead whether an unresolved project detail needs that contact’s input. Describe the mark and its history first. Do not infer a building-code defect or structural cause from a photograph of a joint or corner.
- Log the room, pattern, first observation and any earlier repair.
- Distinguish a surface assessment from an enquiry about an open project condition.
- Ask the proposed repair scope to state what investigation and decorating are excluded.
A few practical questions.
Does a visible line always mean failed joint tape?
No. The line’s location and history help describe the condition, but they do not confirm the cause. Ask the person assessing it to distinguish the observation from the diagnosis and proposed method.
Should I push a raised fastener back in before the visit?
Leave the area available for assessment and describe what you can safely observe. This guide does not provide instructions for disturbing existing surfaces or concealed services.
Sources & editorial context
- How to Install and Finish Gypsum Drywall Panels · Canadian guide (PDF)CGC / USG · Checked October 24, 2026
- Building and plumbing inspectionsCity of Coquitlam · Checked October 24, 2026
Technical references support the points linked above. The checklists and planning questions are editorial guidance, not a specification or an account of a contractor’s completed work.