Sertec

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Across
  1. 6. heating system often powered by gas
  2. 8. heat distributor attached to the wall of a room
  3. 10. a famous French seductress
  4. 11. walls that are internal and subdivide a building into rooms
  5. 15. a fine-grained metamorphic rock used on rooves
  6. 18. tool used by surveyors
  7. 19. a wall that is essential to the building's stability
  8. 20. downward movement of the ground when a load is applied to it
Down
  1. 1. the depth the groundwater in soil is expected to freeze
  2. 2. protection from heat dispersion
  3. 3. the surname of an up and coming interior designer
  4. 4. the interface between a building and the supporting soil
  5. 5. airborne device/ plane used to survey land from above
  6. 7. the process by which water or waste liquid flow away
  7. 9. an alloy mostly of iron with a carbon content
  8. 12. the water distribution system in a building
  9. 13. waste water pipes
  10. 14. a fine-grained natural soil material used for ceramics
  11. 15. a successful engineering and construction company
  12. 16. distance between the supports of an arch or bridge
  13. 17. a hard-working and original woman
  14. 18. cut wood used for construction