Flashcard on Common Lumber Defects and Their Remedies

Front

What is a common cause of checks in lumber?

Back

Rapid drying

Front

Which defect is characterized by an end-to-end curve along the face of the board?

Back

Bow

Front

What causes a knot in lumber?

Back

Branch

Front

Which defect is caused by molds during drying or storage?

Back

Discolored Stain

Front

What is the recommended remedy for a cupped board?

Back

Use a jointer

Front

Which defect is described as an edge-to-edge curve across the face of the board?

Back

Cup

Front

What is a common remedy for machine burn on lumber?

Back

Use a jointer or sander

Front

Which defect is caused by improper drying and results in separations along the growth rings?

Back

Splits

Front

What is the defect where the board is flat but turns up from end to end like a boat?

Back

Bow

Front

Which defect is described as an irregular warping where one corner is not aligned with the others?

Back

Twist