Why Are My Jigsaw Puzzle Pieces Warped? Fixes That Work
By Bits and Pieces | Published: 2026-10-21
Category: Tips & Care
Warped puzzle pieces are usually caused by humidity or poor storage. Learn how to flatten them and prevent future damage with these practical fixes.
Quick answer
Warped puzzle pieces are almost always caused by moisture changes. You can often flatten them with gentle weight and dry air, but badly warped pieces may need replacing.
Why humidity is the main culprit
Jigsaw puzzle pieces are made from paperboard or recycled materials that absorb moisture from the air. When humidity rises, the fibers swell unevenly, causing the piece to curl or bow. This is especially common in basements, garages, or rooms with poor ventilation.
Temperature swings also play a role. Moving a puzzle from a cool room to a warm one can create condensation on the surface, which accelerates warping. The same thing happens if you store a puzzle in an attic or near a window.
When to stop trying to fix a piece
If a piece is cracked, has torn layers, or feels brittle, flattening it may cause further damage. In that case, the best option is to contact the manufacturer for a replacement or buy a new puzzle. Bits and Pieces offers puzzles made from recycled materials, which are generally durable but not indestructible.
Diagnosis and fix for warped puzzle pieces
- Symptom: One or more pieces have a visible curve, cup, or twist. They may not lie flat on the table or fit snugly with neighboring pieces.
- Likely cause: Exposure to high humidity (above 60% relative humidity) or a sudden change in temperature. Storing the puzzle in a damp room or near a heat source also triggers warping. Check the humidity in your puzzle room with a cheap hygrometer. If it's above 60%, that's your root cause.
- Corrective action: Place the warped piece between two sheets of clean paper (like printer paper) and put a heavy book on top. Leave it for 24-48 hours in a dry, room-temperature spot. For stubborn warps, use a hair dryer on low heat from 6 inches away for 10-15 seconds before pressing. If the piece is still warped after 48 hours, it may be permanently damaged.
- Stop or choose another option: If the piece cracks, splits, or the image layer peels during flattening, stop immediately. Contact the puzzle manufacturer for a replacement piece, or consider buying a new puzzle if the piece is essential to the image.
Puzzle that holds up well
- Amsterdam Tulips Jigsaw Puzzle: Made from recycled materials with random cut pieces that are no two alike. Recycled paperboard can be more sensitive to humidity than virgin board, so proper storage is extra important for puzzles like the Amsterdam Tulips Jigsaw Puzzle.
Amsterdam Tulips Jigsaw Puzzle
