Every flooring quote contains one unknown, and it is the same one every time: what is underneath.
This is the main reason we measure in person rather than over the phone. Standing in the room tells us the age of the house, how the existing floor was installed, whether there is a crawl space or a slab under it, and whether the floor sounds hollow when you walk on it. None of that comes through a phone call, and all of it changes the job.
Why the subfloor decides everything
A finished floor is only as flat, as dry and as solid as what it is fastened to. Every problem in the subfloor comes through to the surface eventually, and usually within the first two years.
An unlevel subfloor shows up as hollow spots underfoot and, in a click-together floor, as separated joints where the planks have flexed apart. A damp subfloor shows up as cupped boards or as a failed adhesive bond. A squeaking subfloor stays squeaking, because a new floor laid over it does nothing to the fastening underneath.
None of these are dramatic on install day. They arrive later, which is precisely why they are worth dealing with while the floor is up and everything is accessible.
The five things we check
Flatness
Manufacturers specify flatness tolerances, and they are tighter than most people expect — commonly a limit measured over a ten-foot span. Older houses rarely meet it out of the box.
We check with a long straightedge across the room in several directions. Low spots get filled with a levelling compound; high spots get ground down. On a badly out-of-tolerance floor the answer is a self-levelling pour across the whole room, which is a bigger job but the right one.
This matters most for rigid click-together floors, which bridge a dip rather than following it, and put all the stress on the joint at the edge of the hollow.
Moisture
In a wet climate this is the check that saves the most jobs.
Concrete slabs hold moisture and give it up slowly, and a slab that feels dry to the hand can still be well above the limit for an adhesive or a floor covering. Wood subfloors over an unvented or poorly vented crawl space pick moisture up from below through the winter.
Where there is a moisture concern the answer is usually a vapour barrier or a moisture-mitigation product before anything is laid, not a change of floor covering.
Fastening and squeaks
A squeak is movement — a board rubbing against a joist or against a nail shank. With the old floor up, the fix is straightforward: screw the subfloor down properly into the joists, which pulls the panel tight and stops the movement.
This is the single cheapest improvement available during a flooring job and the one that is most annoying to have skipped, because getting back to it later means pulling up the new floor.
Damaged or soft panels
Soft spots near a dishwasher, a fridge with an ice maker, a toilet or an exterior door are common, and they are always a past or present water leak. Any panel that has lost structural integrity gets cut out and replaced back to the joists. Laying a new floor over a soft panel guarantees a callback.
Height at the doorways
The new floor stack — underlayment plus plank, or pad plus carpet — is rarely the same thickness as what came out. That changes how doors swing and how the floor meets whatever is in the next room.
Worth knowing before install day rather than during it, because occasionally the answer is trimming the bottom of a door, and occasionally it changes which product makes sense.
What older Newberg and Yamhill County houses tend to show
We have been working on houses in this valley since 1978, and there are patterns.
Houses built before the war often have a plank subfloor rather than sheet goods, laid diagonally across the joists. It is solid, but the gaps between planks mean a modern floor usually needs a sheet underlayment over the top to give a continuous surface.
Houses from the mid-century through the 1970s frequently have a layer of sheet vinyl still down under whatever replaced it. It is normally simplest to leave a sound, well-bonded layer where it is and work over it.
Post-1970 subdivisions are usually the most straightforward work we do — the subfloor is sheet goods over engineered joists, it is flat, and it is predictable.
Across all of them, crawl space ventilation and drainage is the recurring issue in this climate, and it is worth looking at while the floor is up.
How this affects your quote
We would rather tell you about subfloor work before you commit than discover it on install day, because install day is the worst possible moment for anyone to be discussing money.
So when we measure, we tell you what we can see and what we cannot. Some things are visible from the room — the age of the house, the sound underfoot, the doorway heights, obvious soft spots. Some things genuinely cannot be known until the old floor is off, and where that is the case we say so and explain what the range of outcomes looks like, rather than pricing for the best case and coming back to you later.
Removal and disposal is part of it
Taking the old floor up is real work, particularly with glued-down vinyl, tile set in thinset, or carpet with a pad that has bonded to the subfloor. It also produces a surprising volume of material to get rid of.
We handle removal and disposal as part of the job. What we do not do is take on repair work for hard surface flooring, tile or countertops on projects we did not install, because we cannot warrant a system we did not build and cannot see.
The short version
The floor you choose is the fun decision. The subfloor is the one that decides whether you are still happy in year eight. Spend the money there first.
Norman's Floor Covering is licensed with the Oregon Construction Contractors Board under CCB 103259, and our installation work carries a ten year labor warranty. Estimates are free and we come to you.
