Design Guides
Trim Selection Guide
Updated 3 min read
The short answer
Trim proportion matters more than trim profile. Scale baseboard to your ceiling — roughly 90–140mm at 8ft, 140–180mm at 9ft, 180–230mm at 10ft — and make sure door casing is thicker than the baseboard that dies into it. Get those two relationships right and almost any profile looks considered; get them wrong and the best profile still looks like an afterthought.
Scale by ceiling height
| Ceiling | Baseboard | Casing width | Crown |
|---|---|---|---|
| 8ft (2440mm) | 90–140mm | 65–90mm | Small cove only, or none |
| 9ft (2740mm) | 140–180mm | 90–115mm | 100–140mm |
| 10ft (3050mm) | 180–230mm | 115–140mm | 140–200mm built-up |
| Vaulted | Match tallest adjacent wall | As above | Usually omit |
Casing must be thicker (in projection) than the baseboard, so the baseboard can die cleanly into it. This is why upgrading baseboard usually means upgrading casing too.
Profile families
- Flat / square stock
- Rectangular with no profile. Contemporary, inexpensive and forgiving. Suits modern interiors and infills. Can look flat if undersized.
- Shaker / stepped
- Simple stepped detail. The most versatile family — reads as transitional and works in almost any house.
- Colonial / traditional
- Curved ogee detail. Standard in Calgary homes from the 1980s and 1990s. Appropriate for traditional interiors.
- Craftsman
- Wide flat casing with a projecting head casing above openings. Strong character; commits the room to a style.
- Victorian / heritage
- Deep, elaborately profiled. Right in genuinely period homes, overwrought in most others.
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Choosing trim: the short version
- Measure your ceiling height and pick a baseboard from the table above.
- Confirm your door casing is thicker in projection than the baseboard.
- Pick one profile family and use it throughout — mixing families reads as accidental.
- For painted trim in Calgary, specify primed MDF unless there is a reason not to.
- Avoid MDF at floor level in bathrooms, laundry rooms and mudrooms.
- Check whether crown suits your ceiling height before assuming you want it.
- Budget for removal and drywall repair if replacing existing trim.
Answers
Frequently asked questions
- How tall should baseboards be?
- Scale to your ceiling: roughly 90–140mm at 8ft, 140–180mm at 9ft, and 180–230mm at 10ft or higher. Then check your door casing — the baseboard has to die into casing that projects further than it does, so the two usually need upgrading together.
- Should trim be white or match the wall?
- Both work. White or off-white trim against a colour is the traditional approach and gives crisp definition. Trim painted the same colour as the wall is a more contemporary look that makes a room feel calmer and larger, and it is very effective in smaller rooms. What rarely works is a third colour that relates to neither.
- Is MDF trim lower quality than wood?
- For painted trim in Calgary, no — it is arguably the better specification. MDF is dead flat, takes paint beautifully, machines crisply and does not move with seasonal humidity, which is the main cause of opening joints here. Use solid wood for stained trim and where impact resistance matters.
- Do I need to replace all the trim at once?
- No, but plan it by connected sightlines rather than by room. Trim that changes height at an open doorway looks unresolved. Doing a floor, or a set of connected rooms, is a sensible phase boundary.
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