Can cedar roofing shingles be used as BBQ planks?

Cedar roofing shingles should not be used as BBQ planks, as they are not treated for food safety and may contain harmful chemicals or preservatives. Additionally, roofing shingles are not designed for cooking, which could lead to the release of toxic substances when heated. For BBQ planking, it's best to use food-grade cedar planks specifically intended for cooking, ensuring both safety and flavor.