Before renting a floor sander, however, it's worth understanding what separates a successful refinishing project from one that requires expensive repairs.
The biggest misconception is that the sanding machine does all the work. In reality, the machine is only a tool. The quality of the finished floor depends almost entirely on the person operating it.
Professional Equipment Doesn't Guarantee Professional Results
Many rental stores offer commercial-grade sanding equipment similar to what professionals use. While the machines may look the same, experience is what produces consistent results.
Professional floor sanding requires controlling the machine, selecting the proper abrasive sequence, blending edges into the field of the floor and recognizing problems before they become permanent. Small mistakes can leave waves, chatter marks, drum marks or low spots that may only become visible after the finish has been applied.
If you're curious about what actually goes into a refinishing project, our article Why Hardwood Floor Refinishing Is Harder Than It Looks explains why hardwood floor refinishing is often more technical than homeowners expect.
Can Mistakes Be Corrected?
Sometimes.
Minor sanding imperfections can often be corrected with additional work. Unfortunately, removing too much wood, rounding board edges or creating uneven areas in the floor may not always be repairable without significantly increasing the amount of sanding required.
In some situations, damaged boards must be replaced before refinishing can continue.
Does DIY Actually Save Money?
It can, but not always.
Rental equipment, sandpaper, stains, finishes and supplies all add to the overall cost. More importantly, mistakes can quickly eliminate any savings if portions of the floor have to be repaired or refinished a second time.
Many homeowners discover that refinishing hardwood floors is considerably more difficult than they expected after the project has already begun.
When Hiring a Professional Makes Sense
Professional hardwood floor refinishing isn't simply about completing the work faster. It's about producing a floor that is flat, smooth and finished properly the first time.
An experienced contractor can identify damaged boards, recommend repairs, recognize moisture issues and adjust the sanding process based on the species and condition of the wood. Those decisions come from years of experience, not from the owner's manual of a rental machine.
If you're unsure whether your hardwood floor is even a good candidate for refinishing, our article Can Wood Flooring Be Repaired or Refinished? explains what professionals look for during an inspection.
The Bottom Line
There's nothing wrong with tackling projects around your home. Many homeowners successfully complete painting, landscaping and other improvements themselves.
Hardwood floor refinishing is different. Unlike paint, mistakes usually can't be covered with another coat. Once wood has been sanded away, it can't be put back.
Before deciding whether to tackle the project yourself, compare the cost of renting equipment and materials with the value of having your hardwood floors professionally refinished. For many homeowners, the peace of mind alone is well worth the investment.
