Baseboards, Quarter Round and Trim: The Honest Guide

You can buy the best floor in the store and still end up with a job that looks cheap, because of the trim. Baseboards, transitions and stair nosing are what your eye goes to. Here's how we think about it.

Why there's a gap at all

Floating floors (vinyl, laminate, a lot of engineered) need an expansion gap at every wall. Usually it's around 1/4" to 3/8", but the install guide gives the exact number. The floor grows and shrinks with the seasons, and without that gap it buckles. Something has to cover the gap: baseboards, or quarter round in front of them.

Option 1: remove and reinstall the baseboards (best)

We take the baseboards off carefully, install the floor right to the gap, and put them back down on top of the new floor. The gap is hidden under the baseboard. Then we fill the nail holes and caulk the top. Paint touch-ups may be needed.

• Pros: the cleanest, most built-in look. No extra moulding to catch dust.
• Cons: old MDF baseboards sometimes break coming off, and you'll usually want to touch up the paint.

Option 2: new baseboards (often worth it)

If you're doing the whole main floor anyway, new baseboards are one of the best-value upgrades in a house. They're a big part of why a room looks "finished."

• Height: older Lower Mainland homes often have small 3¼" colonial base. Going to 4¼"–5½" (or taller in rooms with high ceilings) instantly modernizes a room.
• Profile: simple and square, or a small bevel or step, looks current. Ornate colonial profiles date a room.
• Material: primed MDF is the standard for painted base. Use real wood or PVC in wet areas like bathrooms and mudrooms, where MDF swells.
• Colour: paint it to match the door casings and trim. White or soft off-white is classic. Painting baseboards the wall colour is a modern look that makes rooms feel taller.

Option 3: quarter round or shoe moulding

Leave the baseboards and nail a small moulding along the bottom to hide the gap.

• When it's fine: around kitchen cabinets and stair skirts, where removing things isn't practical. Use the smaller "shoe" profile, which looks neater than chunky quarter round.
• When it's not: throughout a whole house. It reads as "budget job," it catches dust, and it makes your baseboards look shorter.
• Colour: paint it to match the baseboard, not the floor. Floor-matching quarter round looks like a stripe of brown along every wall.

Transitions: where floors meet

• Floor to tile: usually a low-profile reducer or T-moulding. Plan the height. Sometimes we raise or lower the subfloor to get a near-flush transition.
• Floor to carpet: a carpet-edge or end cap.
• Big open areas: long runs of floating floor may need expansion breaks under doorways. Check the maker's maximum run length.
• Sliding doors: a threshold or end cap that matches. This is a spot where cheap trims look worst.

Matching trims (the same colour as the floor) come from the flooring maker. Check they exist before you fall in love with a floor, especially stair nosing.

Doors, appliances and height

• Door jambs and casings get undercut so the floor slides under them. Caulking the floor to a door casing is a shortcut that looks bad.
• Interior doors may need trimming if the new floor is higher.
• Dishwasher: make sure it can still come out. Floors installed in front of it can trap it.
• Fridge: check the height of the opening under the upper cabinets.

Stairs: the trim that matters most

Stairs are where floor jobs show their quality. Hand-cut treads, proper nosing, and risers painted to match the baseboards look custom. Clunky overlay nosings and caulk everywhere don't. More on stairs here.

Common questions

Should I remove baseboards when installing new flooring?

For the best result, yes. Removing the baseboards and reinstalling them on top of the new floor hides the expansion gap without quarter round and gives a clean, built-in look.

Is quarter round outdated?

Used throughout a house, it tends to look like a budget job. It still has a place around cabinets and stair skirts where baseboards can't come off. Use a slim shoe moulding and paint it to match the baseboard.

What height should baseboards be?

For most modern Lower Mainland homes with 8–9 ft ceilings, 4¼" to 5½" looks right. Rooms with higher ceilings can go taller. The small 3¼" colonial base in many older homes tends to look dated.

Should baseboards match the floor or the walls?

Usually the door trim, often white or off-white. Painting baseboards the wall colour is a modern option. Wood baseboards stained to match the floor are rarely the best look today.

Who's writing this: Rose and Thorn Flooring is a flooring company in Surrey, BC. We install floors for a living, so yes, we'd love to do yours. But nobody pays us to say nice things about a product, and we don't earn commission from any brand. If something here is wrong or out of date, text us at 604-716-4160 and we'll fix it.