If you’re not a woodworker, you may not realize that the panels in raised-panel doors just float in the frame — then again, if you own a few doors that rattle, you might be painfully aware of that fact. Squeeze some Space Balls between the panel and frame when you’re assembling the door, and the panel will still be able to move, but it won’t rattle.
Panels are left to float so they can cope with the expansion and contraction of the wood, but this leaves space between the panel and the frame. Space Balls automatically center the panels in the frame, and will expand and contract with the panel.
When installing you should use about eight to ten balls per door — this breaks down to two to three balls per rail or style. The balls should fit snugly but only be compressed to about one-half their diameter. Unfortunately Space Balls will only help with new raised-panel doors, unless you can carefully disassemble the door without destroying it.
Space Balls come in three sizes; size 190P will fit 0.19″ grooves, 210P will fit 0.21″ grooves, and 260P will fit 0.26″ grooves. A pack of 100 Space Balls will run you $4 to $6.