20th century evolution of construction practices

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Across
  1. 2. Traditional building material that was a mix of clay, sand, and straw, mixed with water
  2. 5. A property of steel which enable buildings to be capable of withstanding heavy loads and external forces.
  3. 8. Welsh word for 'steel'
  4. 9. The combination of these three materials has significantly enhanced the durability and longevity of structures(6,5,5)
  5. 11. Welsh slate, local stone, local timber and Cob are all examples of locally ------- materials.
  6. 12. DPC(4,5,6)
  7. 14. Welsh word for 'transport'
  8. 15. Something that cement manufacturers have focused on reducing, in order to make their products more sustainable(6,9)
  9. 16. The introduction of modern construction materials like steel and cement has helped to significantly reduce the ---- of construction, making it more affordable.
  10. 17. Concrete has high ------- ----, meaning it can absorb, store and release heat slowly(7,4)
  11. 20. Because of it’s strength, steel allows architects to design buildings with large ---- spaces.
  12. 21. The type of windows that were prominent in historic and religious buildings, showcasing the wealth and influence of owners(7,5)
Down
  1. 1. Bricks and concrete blocks have high ----------- strength, making them suitable for load-bearing and non-load-bearing walls
  2. 3. Reinforced concrete, with its resistance to weathering and corrosion, ensures long-term ---------- --------- of a building(10,9)
  3. 4. The type of dressed stone used on a building to demonstrate wealth and status(4,7)
  4. 6. Energy efficient glass has improved the ------- performance of buildings, reducing energy consumption.
  5. 7. Developments in what type of infrastructure, have had a significant influence on the supply of materials used in the Welsh construction industry.
  6. 10. Welsh word for 'glass'
  7. 13. Word used to describe something that lasts a long time without getting damaged or worn out. Examples of building materials with this property are concrete and steel.
  8. 16. The quality and intricacy of timberwork, such as exposed beams and decorative --------, showed the status and wealth of the building.
  9. 18. Prefabricated steel components, reinforced concrete and modular glass panels can be manufactured off-site, reducing on-site construction time, which has significantly increased the ----- of construction.
  10. 19. A property of steel which makes it sustainable, and allows it to be re-used again and again on future construction projects.