Knowing how to quickly identify and efficiently fix common problems with hardwood floors is an important skill to have.
Here are some of the most common problems that occur while installing hardwood floors — including cupping, crowning, and squeaky floors — and instructions on how to fix them.
How to Fix Cupping
Cupping is denoted by wood that is raised on the edges of each individual floor board. The center of the board dips below the edges. This makes the wood appear to be in a “U” shape. (See the picture at the top of this post for an example of a cupped floor.)
Typically, cupping is a problem that stems from excessive moisture. Anything from pipe leaks to a still-wet concrete slab to improper HVAC usage can cause cupping.
To fix the issue of cupping the first and most crucial step is to assess the moisture problems. Take the necessary steps to stop or correct the source of the moisture problem. Once this has been completed, take readings with a moisture meter to confirm the wood is at the correct level according to the manufacturer’s specifications.
DO NOT sand a cupped floor. Sanding a hardwood floor while it is still cupped will result in a problem called “crowning.”
How to Fix Crowning
Crowning is typically a problem that is a direct result of cupping. Crowning is characterized by wood that is raised in the center and dips down on the long edges of the planks.
This issue comes from sanding a floor that was cupped and still had moisture issues. The cupped floor was sanded to be flat, but once the moisture levels return to an acceptable level, the edges of the plank were sanded down below the center.
To fix a floor with crowning, you must first be sure that the moisture levels are acceptable and there are no issues such as leaks, wet slabs, or improper HVAC usage. If you need a crash-course on testing moisture the content of a hardwood floor, check out our guide.
Once you are sure the moisture is at the right level, you must completely sand the floor to be flat.
Halo Effect/Picture Framing in Wood
The halo effect (also known as picture framing) is when the edges of a room appear to be a different color than the center.
The most common reason for the halo effect on a hardwood floor is when different sanding approaches are used in the same area. For example, picture framing could result from using 60, 80, 100 sandpaper on the big machine, but using 80, 100, 120 with the edger.
The fix for the halo effect is to re-sand the floor and use the same sanding schedule for the big machine and edger.
How to Fix Chatter Marks in Wood
Chatter marks are repeated imperfections on the floor that are between 1/2″ and 3/4” apart.
They are traditionally caused by some sort of failure in the big machine sander. Bad sandpaper
alignment, uneven wheels, incorrect drum pressure, imbalanced drums, loose V-Belts, or failed
bearings are common issues that could produce chatter marks on hardwood floors.
The best way to prevent chatter marks is to make sure your big sander is operating perfectly. You may have to take it to a repair shop to have it serviced.
If there are already chatter marks on your floor one great way to fix them is by using a multi-disc sander like the Lagler Trio. The multi-disc sander is specifically designed for finish sanding. It is powerful enough to remove cross grain scratches but will not change the wood floor’s topography.
Read our blog about getting rid of chatter marks for more details about this issue.
How to Fix Squeaky Wood Floors
Hardwood floors with significant movement or noises could be the result of several factors.
If the floors were installed with improper nailing schedules or the incorrect adhesive, they will be loose and cause noise. If the subfloor is inappropriate for the wood floor being installed that could also be the cause the noise or movement.
Fixing the problem of movement and noise could be simple like adding adhesive to the problematic floor boards or top nailing. However, if the problem is extensive, then it may be necessary to reinstall the entire floor.
If you have any additional questions regarding these common problems with hardwood floors, feel free to contact us at (800) 737-1786 or firstname.lastname@example.org.