Mystery Marks in the Wood Floor

Oct 28, 2013

Carpet Stretcher Marks

Have you come across marks this when you go to resand a wood floor? Do you know what they are?

Carpet Stretcher Marks

They are from an inexperienced carpeting installer using a carpet stretcher. The marks will not sand out and usually run about 1/16 inch deep:

Unless you can match the wood and do board replacements, the best you can do is fill them before the new finish:

Tj Haas Squealing Edger

This Is What I Found Inside the ‘Squealing’ Edger

January 6, 2026

Tj Haas Squealing Edger

This Is What I Found Inside the ‘Squealing’ Edger

Am25 Ftf Equip Maint

Things Your Wood Floor Sanding Equipment Wishes You Would Do

The Crazy Thing That Chandelier

The Crazy Thing That Happened After the Chandelier Dented This Floor

Some drum problems we see (clockwise from top left): a deep nail groove; chunks missing and the rubber almost melted on a rider drum; a chunk missing from next to the slot on a Galaxy drum from running it as a belt without having a shim in the slot; and a crack in the actual metal.

Get Better Sanding by Taking Care of Your Drum

This Is What I Found Inside the ‘Squealing’ Edger

A five-year-old FG Floortec Taifun edger that gets used extensively came to me recently with a complaint about a "squealing sound" and overloading on start-up—and this is what I found.

Tj Haas Squealing Edger

Things Your Wood Floor Sanding Equipment Wishes You Would Do

Here are some things we do that keep our wood floor sanding equipment working and making money instead of in my maintenance shop.

Am25 Ftf Equip Maint

The Crazy Thing That Happened After the Chandelier Dented This Floor

"Honestly, on this job I never thought about this situation happening in a million years," says wood floor pro Josh Hansman about this repair of a wood floor with dents from a massive chandelier.

The Crazy Thing That Chandelier

Troubleshooting

Get Better Sanding by Taking Care of Your Drum

Here are some tips from sanding drum expert Jerry Brainerd for getting a longer life for your big machine drums and ensuring you get better, more consistent sanding in the meantime.

Some drum problems we see (clockwise from top left): a deep nail groove; chunks missing and the rubber almost melted on a rider drum; a chunk missing from next to the slot on a Galaxy drum from running it as a belt without having a shim in the slot; and a crack in the actual metal.

Troubleshooting

Q&A: What Are These Strange Raised Areas in this Wood Floor?

After sanding, water-popping and staining the wood floor, these strange raised areas appeared. What are they and where did they come from?

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Troubleshooting

Wood Floor Mystery #8: Is This Floor Fungus Among Us? Part 2

Wood flooring pro Stephen Diggins reveals what the mysterious black substance in the back of this consumer's closet that appears to be mold really is.

3 8 21 Mystery 8 Silicon Carbide Abrasive

Troubleshooting

Wood Floor Mystery #8: Is This Floor Fungus Among Us? Part 1

Wood floor pro Stephen Diggins' latest wood floor mystery involves photos of a floor that appear to show black mold growing on the floor. But is that what it is?

Troubleshooting

This Unidentified Flooring Oddity Turned Out to Be ‘Resonance’

Sometimes the source of chatter on a wood floor is more typical and has something to do with only the sander ... and sometimes the reason involves more interesting physics.

Above left, the chatter marks showed up perfectly perpendicular to the floor, even when the big machine was run at an angle to the floor. Above right, the final result after sanding with a multi-head sander.

Troubleshooting

Wall of Shame: Client's Sand Job Leaves Species Unidentifiable

Wood floor pro Eric Cohen almost dropped the phone out of his hands at first glance of this floor.

Troubleshooting

Wood Flooring Wall of Shame: Shameful Sanding

Wood flooring pro Greg Wegrzycki shares a wood floor he saw that had some "interesting" sanding.

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Troubleshooting

Wall of Shame: What a Wood Floor Looks Like When You Don't Lift the Drum

Wood flooring pro Brad Nelson shares a job where they managed to fix the floor after the homeowner had used a big machine like a vacuum cleaner.

Wallofshame 218 Med

Troubleshooting

Really Bad Wave ... and Why It Wasn't the Machine's Fault

Wood floor pro Stephen Diggins investigates the problems of a big machine that kept leaving wave on the floor ... what was it the machine?

11 21 Two Wave Pics

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