Rough and irregular brickwork is distinctive of the craftsman style. Clinker-bricks were originally discarded because they were discolored or distorted. Around 1920, they were discovered by Craftsman architects to be usable, distinctive and charming! The name "clinker-brick" comes from the sound that they would make when banged together, being heavier than regular bricks. Click here to see other examples of clinker bricks.