Repair or refinish: how to read a damaged Calgary hardwood floor
Most people who call us have already decided their floor is a disaster. Usually it is not. The gap between "a few boards need fixing" and "this whole floor has to come back to bare wood" is the biggest single difference in cost on any hardwood job, and you can work out which side of it you are on before anybody comes to look.
Three questions decide it: how far the damage spreads, whether the finish is still working, and how much wood is left underneath. Here is how to answer all three on your own floor.
Question one: is the damage in one place or everywhere?
Walk the floor in daylight and mark the problems mentally. Damage that clusters, a gouge where the fridge was pulled out, a dark patch under where a plant sat, a split board by the back door, is repair territory. Damage that runs, pale traffic lanes from the entry to the kitchen, an overall dullness, scratches spread across every room, is refinish territory.
The middle case is the one we see most in this city. Carpet comes up off a 1960s or 1970s bungalow floor and the owner finds a line of tack strip holes around the perimeter, staple marks from the underlay, and a stripe of darker oak where a hall runner sat for twenty years. That reads like catastrophic damage and almost never is. The perimeter holes disappear under the shoe moulding. The stripe is a colour difference in the surface, not in the wood, and it sands out.
Question two: is the finish still doing its job?
This is a one minute test and it settles more arguments than anything else on this page.
Put a drop of water on the worst looking traffic path. Wait a minute, then look at it.
- It beads and sits there. The finish is intact. Whatever is wrong is on the surface, and a screen and recoat will fix it. That is a one day job, very little dust, room back in use the next morning.
- It soaks in and darkens the wood. The finish is gone in that spot and there is nothing for a new coat to bond to. You are looking at a full sand-back.
Do it in three or four places, because floors fail unevenly. A house with a worn entry, a worn kitchen doorway and five untouched bedrooms is very common, particularly in the older rental stock around SAIT and the university, and it does not necessarily need a whole-house refinish. It may need repairs and a sand-back in the two rooms that took the traffic.
Question three: how much wood is left?
Solid hardwood can only be sanded back to bare wood a limited number of times before the wear layer above the tongue runs out. Once it is gone the floor is done for good and no amount of money changes that, so this is worth knowing before you spend a refinish rather than after.
You can usually see the answer yourself. Lift a floor vent, or look at the edge of a board at a stair nosing or a doorway threshold. What you want to know is two things: whether it is solid wood all the way down or a thin veneer over a plywood core, and how close the nail heads are sitting to the surface.
Most Calgary floors come out of this well. The city built out heavily between the late 1950s and the early 1980s, the standard floor of that period is solid 2 1/4 inch red oak strip, and a large share of those floors have been through one refinish at most because they spent thirty years protected under carpet. The floors that fail this question are the ones already sanded twice by previous owners, and engineered floors from the 1990s and 2000s where the real wood on top is only a couple of millimetres thick.
What about the gaps that open every winter?
Almost every Calgary homeowner notices this and a good number of them think the floor is failing. It usually is not.
Wood takes on and gives off moisture with the air around it. Indoor air here gets very dry through a prairie winter, particularly through a cold snap, so the boards give up moisture, shrink slightly, and thin gaps open along the seams. In spring the humidity comes back, the boards take moisture up again, and the gaps close. Health Canada's guidance for homes is to hold indoor relative humidity between 30% and 50% (Health Canada), and floors that swing well outside that band move the most.
Seasonal gapping is not damage and it is not a repair. What is worth a look is a gap that does not close in summer, a gap wide enough to catch a coin, or a board that has started to lift, cup or split at the end. Those are movement rather than season, and the underlying cause has to be dealt with before any finish goes down. Filling seasonal gaps at their widest point in February is a classic mistake, because the boards swell in May and squeeze the filler straight back out.
If boards are cupping rather than gapping, that is moisture arriving rather than leaving, and it belongs on the water damage page instead.
One thing to plan for either way
Sanding is the part of this work that fills a house with fine dust, and that dust is a genuine exposure rather than a nuisance. Wood dust is classified as a Group 1 human carcinogen by the International Agency for Research on Cancer (CCOHS).
Practically, that is the argument for real dust extraction and for staying out of the house while the sanding runs, whether the work is ours or your own. If you are renting a drum sander for the weekend, a shop vacuum and an open window are not containment. It is also a reason a recoat is worth taking seriously when a recoat will do: there is barely any dust in one.
Putting the three answers together
| What you found | What it needs |
|---|---|
| Damage in one or two spots, water beads elsewhere | Board repair plus a recoat of that room |
| Even dullness and light scratching, water beads | Screen and recoat |
| Water soaks in along the traffic paths, damage spread across rooms | Full sand-back and refinish |
| Boards cupping or lifting at the edges | Water damage assessment first, refinish after |
| Thin veneer over plywood, or already sanded twice | Neither. A recoat if it will take one, otherwise plan on replacement |
The honest summary is that repair and refinish are not really competing options. Repair is what happens to individual boards, refinishing is what happens to a surface, and most real jobs are some of both: fix the broken boards first, then decide whether the surface over the top needs a fresh coat or a full reset.
If you cannot tell which column you are in, that is what the free visit is for. We come and look at the floor in person, tell you plainly which one it is, and give you a number. Read what actually drives the price first if you want to know roughly where your floor will land, or ask for a quote.