How to tell if floor marks are a manufacturing defect or installer error
Strange marks and black spots appearing on new flooring can stem from factory flaws or installation issues. Because these recurring blemishes resist hand polishing, homeowners struggle to identify the root cause before contacting their installer.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Buying boxes from different stores to check for different batches
- 2Inspecting every individual plank to check for repeating patterns
- 3Calling a technician to try hand polishing the affected areas
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“Floor was installed a week ago and today the light hit right that I saw one of these T-shaped marks.”source ↗
“They are all around the floor near edges of pieces.”source ↗
“Was this likely a manufacturing defect or something the installer did?”source ↗
“As you can see in the photo many black spots are clearly visible and they are scattered across many areas of house flooring. they suddenly started showing after 2 years of installation.”source ↗
“He used a hand polishing machine and tried for 15 minutes , still the black spots are not gone.”source ↗
Where this came up
People with this problem also raised
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- 3Why does tile look dirty after cleaning?
- 2Why does new carpet padding feel lumpy and uneven?
- 2Mysterious stains found under old flooring: Is it mold and should I worry?
- 7How to fix dull worn spots on laminate flooring
- 6New floor has too many dark and light boards grouped together