Types of wood

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Across
  1. 4. sourced from trees
  2. 6. can be waterproof
  3. 7. a type of hardwood that has BHEC as letters
  4. 9. sourced from trees
  5. 10. made from recycled wood puplp
  6. 11. small chips compressed together to make a block
Down
  1. 1. if a tree has leaves all year what wood does it produce
  2. 2. type of softwood that starts with 'S'
  3. 3. what was the most successful WW2 aircraft made of
  4. 5. a very sustainable way to substitute wood
  5. 8. takes a long long time to grow