Do not assume a wall cap is a foundation
Anchoring into masonry, concrete or a retaining wall requires verified thickness, reinforcement and edge distances. Surface appearance does not reveal capacity.
Protect waterproofing and drainage
Drilling near foundations or retaining systems can damage membranes, drains or reinforcement. Keep weep holes and service access clear.
Use qualified design for high-consequence locations
Tall fences, elevated decks, pool enclosures and walls holding back soil deserve professional review. A separate post line may be safer than attaching to an unknown structure.
Check the decision before committing
Before ordering or approving work, explain in plain language how the proposal handles do not assume a wall cap is a foundation, protect waterproofing and drainage and use qualified design for high-consequence locations. When the explanation depends on phrases such as “it should be fine,” identify what measurement, document or product specification would replace the guess.
Review the plan from both sides of the fence and through every season. Access, drainage, snow, vegetation and future repairs often reveal problems that are not visible in a front-elevation drawing.
Questions to settle
- What site fact or local rule confirms the approach to do not assume a wall cap is a foundation?
- What trade-off created by protect waterproofing and drainage is acceptable, and who accepted it?
- How will use qualified design for high-consequence locations be inspected or maintained after the fence is complete?
- Which part of the decision depends on a manufacturer, local authority, utility service, surveyor, contractor or engineer?
- What changed condition—soil, grade, use, neighbour access, climate or damage—would require the plan to be reviewed?
Records worth keeping
Photograph post locations, foundations, reinforcement, utility markings and concealed connections before they are covered.
When to pause and get local help
Pause excavation or assembly when the ground, structure or utility information differs from the plan. Unknown buried objects, unstable soil and unverified walls deserve local qualified review.