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.
Delta: include the defect’s history when the project description changes
Delta notes that additional project information can change the guidance its Building Division provides.
Source: City of Delta
If an enquiry began as a cosmetic mark but assessment identifies a wider alteration or concealed issue, update the project description. Keep the original observation and subsequent assessment distinct. A photo of a corner or joint should not be used to certify the condition of the underlying construction.
- Log the room, location, recurrence and any known earlier repair.
- Ask the assessor which new information changes the proposed scope.
- Have the lead resolve any additional investigation before another cosmetic repair is accepted.
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 renovatingCity of Delta · 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.