Why People Ask
Removal is one of the largest variable lines on a flooring quote — $0.50 to $3 per square foot in Calgary, with mortar-set tile at the top of that range. Skipping it is the single easiest way to reduce a project’s cost.
It is also the decision most likely to cause regret, because the consequences do not show up on installation day. They show up two years later as separating joints, or immediately as a dishwasher that no longer slides out.
Here is how to tell which situation you are in.
The Four Checks
1. Is the existing floor a suitable base?
Some floors make a fine substrate. Some never can.
| Existing floor | Can you float over it? |
|---|---|
| Ceramic or porcelain tile, flat and well bonded | Usually yes, within grout-line limits |
| Sheet vinyl, single layer, well bonded | Often yes |
| Glue-down vinyl plank or tile, sound | Often yes |
| Hardwood, flat and solid | Sometimes, if the manufacturer allows it |
| Laminate or floating vinyl | Generally no — floating over floating is unstable |
| Carpet and pad | Never |
| Anything loose, cupped, water-damaged or spongy | No |
2. Is it flat enough?
The new floor inherits every flaw underneath it. Rigid-core products bridge small imperfections better than thin ones, but nothing bridges a genuine dip. The usual requirement is flatness within about 3/16 inch over 10 feet, and grout lines wider or deeper than the manufacturer allows need filling first.
3. What does the height change do?
This is the check that gets skipped, and it causes the most annoyance.
- Doors may catch and need trimming.
- Dishwashers and ranges can become difficult or impossible to remove if the floor in front of them rises.
- Stairs change: adding a floor at the top or bottom of a flight changes that riser’s height, and building codes limit how much risers may vary within a flight.
- Transitions to rooms you are not changing become a step rather than a smooth join.
- Floor vents and thresholds need to finish cleanly at the new height.
None of these are dealbreakers, but all of them are easier to solve before the material is ordered.
4. What does the warranty say?
Manufacturers specify what their product may be installed over. Going outside that — floating over carpet, over a non-flat substrate, over a floor with excessive grout joints — usually voids the warranty. If a problem develops later, that clause is what the claim is judged against.
When Floating Over Is a Genuinely Good Idea
Old ceramic tile in a kitchen or bathroom. Removing tile is loud, dusty, expensive work that frequently damages the subfloor underneath. If it is flat and solidly bonded, floating a rigid-core plank over it is a legitimate saving. Our SPC flooring page covers the bridging characteristics of dense cores.
Pre-1990 sheet vinyl. Flooring materials of that era may contain asbestos, which is harmless while intact and hazardous when disturbed. Leaving a sound layer undisturbed under a new floating floor is often both the safest and the cheapest approach.
A single, sound layer with plenty of door clearance. If the height change causes no problems, the case for removal weakens considerably.
When It Is a False Economy
Carpet, always. It compresses, the new floor flexes, joints fail.
Multiple existing layers. Each one adds height and uncertainty. Two or three layers is a sign the house has been avoiding this problem for decades.
Any floor with water damage or soft spots. The problem is underneath, and covering it guarantees a repeat.
Squeaky subfloors. Once a new floor is down, fixing a squeak means taking it up again. Removal is the only moment that repair is cheap — see our subfloor repair page.
Where the height change causes real problems. A dishwasher trapped under a counter is a genuine cost, not a cosmetic one.
What We Actually Do On Site
At the estimate visit we check the existing floor for bond and flatness, measure grout lines if tile is involved, check door and appliance clearances, and look at the transitions to rooms that are staying as they are. Then we price both options where both are viable: float over, or remove and prepare.
Sometimes the saving is worth it. Sometimes the extra $600 of removal buys a floor that will not need attention for fifteen years. Either way, you get to make that decision with the numbers in front of you rather than after the fact.
The Five-Minute Test You Can Do Yourself
Before anyone visits, you can get a reasonable sense of whether floating over your existing floor is realistic.
Tap the tile. Walk the room tapping tiles with a knuckle or the handle of a screwdriver. A solid sound means the tile is bonded; a hollow one means it has debonded and will move under a new floor. Hollow tiles have to come out.
Look for cracks in a line. Cracks running across several tiles usually indicate substrate movement. Floating a new floor over that hides the symptom and leaves the cause.
Check for rocking. Press hard in the middle of the room and along walls. Anything that flexes or clicks is not a suitable base.
Measure the grout lines. Note their width and depth. Manufacturers state how wide a joint their product can bridge; deep, wide lines usually need filling first.
Open a door and look at the gap. How much clearance is there beneath it? Add the thickness of your new floor and see what remains. Then check in front of the dishwasher and the range.
Find a straightedge. A metre-long level laid across the floor in several directions shows up dips you cannot feel with your feet.
If all six checks come back clean, floating over is likely viable. If two or more are problematic, budget for removal — and our flooring removal page covers what that involves.
One Last Consideration: The Next Floor
Whatever you install today will itself be replaced eventually. Each layer left in place makes the next removal harder and the accumulated height greater.
For a floor you expect to keep ten years or more, that is rarely a reason to remove a sound existing layer. For a rental property that will be re-floored every five or six years, it is worth thinking about — at some point, everything has to come off down to the subfloor.
If you want both options priced for your own rooms, a free estimate includes the flatness and clearance checks, and our flooring removal page explains what tear-out involves when it is the right call.