Hardwood Floor Restoration and Repair

Some floors need more than a new finish. Scratches, dents, gaps and damaged boards are repair questions, and they often come up in the same quote as a refinish. This page sets out what the National Wood Flooring Association (NWFA) and Bona say about each, where repair fits into a hardwood floor refinishing job, and what national cost guides list for repairs. "Restoration" has no single definition in the NWFA and Bona consumer pages read for this site. On this page it means repair work that may come with a refinish, which is why it is grouped with repair.

Minor scratches

NWFA says minor scratches can be touched up with touch-up markers, stain pens and repair kits, and that a professional can help with bigger repairs (NWFA, Problem Prevention, as of 2026). It also says the less sheen a finish has, the less small scratches and other normal wear will be noticed (NWFA, Finishes, as of 2026).

Prevention is part of the same advice. NWFA lists felt pads under furniture, avoiding cleats and high heels, throw rugs at entryways and clipping pet nails (NWFA, Problem Prevention, as of 2026, and the NWFA Consumer Outreach Toolkit, uploaded 2020). The aftercare article collects them.

Deep scratches, dents and a finish that has worn through

NWFA recommends a complete sand and refinish when a floor has damage such as deep scratches and dents, and when the finish has worn away and bare wood shows (NWFA, Refinishing Your Floors, as of 2026). Bona says its refinish treatment fixes major damage such as deep scratches and gouges, discoloration and fading, and that refinishing can repair moderate to severe damage (Bona, as of 2026). In those cases the refinish is itself the repair.

NWFA's consumer outreach toolkit says a professional refinisher removes very little wood to make repairs, generally 1/32 inch or less, and that someone without proper training or equipment might remove much more, which greatly reduces the life of the floor (uploaded 2020). Sanding is covered on the floor sanding page.

Stains

Bona lists stains that will not come out among the signs that a floor is ready for refinishing (Bona, as of 2026). No source read for this site says how a particular kind of stain, including a pet stain or a water stain, responds to sanding or to any treatment, so this page makes no claim about that. One documented cause of dark stains on oak is iron: the Wood Handbook (USDA Forest Products Laboratory, 2021) says iron reacts with the tannins in woods such as oak to leave black stains, that steel wool can be a source of the iron, and that iron stain is primarily a problem in outdoor environments. Someone has to see the floor before saying what can be done.

Water damage and damaged boards

Bona says water damage should be assessed as minor or major, and that some floorboards may need replacing (Bona, as of 2026). NWFA describes what moisture does to a floor in general terms: a floor that gains moisture can cup, and a floor that loses moisture can gap or split (NWFA, Problem Prevention, as of 2026). A quote for a floor with water damage should say whether the assessment was made and whether any boards are to be replaced.

Gaps between boards

NWFA says gaps are considered normal if they appear and disappear with normal seasonal changes. Large gaps, or gaps that do not close during the more humid months, are a reason to call a professional. NWFA says both cupping and gapping can be minimized by keeping the home between 60 and 80 degrees Fahrenheit and between 30 and 50 percent humidity, year-round (NWFA, Problem Prevention, as of 2026). The same range is discussed in the aftercare article.

Where repair fits into a quote

The two cost guides that give repair figures list them separately from the refinish itself. Angi (updated August 3, 2026) lists repairs at $200-$600. HomeGuide (as of 2026) lists repairs at $2-$20 per square foot, or $500-$1,500. The guides state the figure in different ways and the ranges differ, and neither is a Cedar Rapids price or what any contractor charges. What refinishing costs sets all of the guides side by side with their dates.

A quote that includes repairs is easier to read if it says:

• which boards or areas are to be repaired, and how;
• whether the repair comes before the sanding or is part of it;
• whether the repair is priced as a flat amount or by the square foot;
• whether any boards are to be replaced, and who supplies them.

When repair is not enough

When damage is widespread, the question moves from repair to whether the floor should be refinished at all, and whether it can be. Refinish or replace covers how to judge a floor, including what NWFA says about solid and engineered wood.