How to make waterproof roofing from leaves, bark, or woven
  • 1. Which type of leaf is generally unsuitable for roofing due to rapid decay?
A) Large, waxy leaves
B) Dry, brittle leaves
C) Soft, thin leaves
D) Needle-like leaves
  • 2. What is the primary purpose of overlapping roofing materials?
A) To add visual appeal
B) To allow for expansion
C) To reduce weight
D) To prevent water penetration
  • 3. What is a common method of securing bark roofing sections?
A) Lashing with natural fibers
B) Gluing with sap
C) Using commercial nails
D) Welding
  • 4. What type of grass is best suited for thatched roofs?
A) Grasses that grow in clumps
B) Spiky grasses
C) Long, stiff grasses
D) Short, soft grasses
  • 5. Which of these factors is most crucial for a durable leaf roof?
A) The time of year leaves are collected
B) Tight packing and secure fastening
C) The smell of the leaves
D) The color of the leaves
  • 6. What natural substance can be used to seal gaps in a bark roof?
A) Sand
B) Gravel
C) Clay
D) Dust
  • 7. Why is it important to dry roofing materials before installation?
A) To prevent rotting and mold
B) To make them more flexible
C) To increase their weight
D) To improve their color
  • 8. What is the recommended roof pitch for a leaf or thatch roof?
A) Slightly sloped (20-30 degrees)
B) Shallow (less than 15 degrees)
C) Flat (0 degrees)
D) Steep (at least 45 degrees)
  • 9. What is the primary function of the roof ridge?
A) To provide structural support
B) To improve ventilation
C) To seal the top seam of the roof
D) To collect rainwater
  • 10. Which of the following tools is essential for thatched roof construction?
A) Thatching needle
B) Soldering iron
C) Screwdriver
D) Welding torch
  • 11. Which of these materials offers the best natural water repellency?
A) Clay
B) Bark
C) Grass
D) Leaves
  • 12. What can be added to grass thatch to prevent insect infestation?
A) Wood ash
B) Sand
C) Salt
D) Sugar
  • 13. How often should a leaf roof be inspected and maintained?
A) Regularly (e.g., every few months)
B) Only after heavy storms
C) Every few years
D) Never
  • 14. What is a wattle and daub structure often used for in conjunction with a natural roof?
A) Walls
B) Drainage system
C) Foundation
D) Chimney
  • 15. What is an important consideration when harvesting bark for roofing?
A) Harvest only after the tree is dead
B) Harvest all the bark from a single tree
C) Harvest sustainably to avoid harming trees
D) Harvest only in the winter
  • 16. Which direction should overlaps face to best shed water?
A) Alternating directions
B) Sideways
C) Upwards
D) Downwards
  • 17. What can be used as an alternative to natural fiber for lashing?
A) Elastic bands
B) Metal wire
C) Thin strips of bark
D) Plastic rope
  • 18. What helps prevent wind uplift on a leaf roof?
A) Gaps for airflow
B) Bright colors
C) Weight and secure fastening
D) Lightweight materials
  • 19. Which of the following can extend the lifespan of a natural roof?
A) Planting trees directly on the roof
B) Rough installation
C) Proper drainage
D) Neglecting repairs
  • 20. What is a key factor when choosing leaves for roofing in a snowy climate?
A) Strength to withstand snow load
B) Bright color to reflect sunlight
C) Soft texture for insulation
D) Sweet smell to attract animals
  • 21. What is the best time of year to harvest grasses for thatching?
A) Spring
B) Winter
C) Any time is fine
D) Late summer or early fall
  • 22. What is the danger of loose thatch or leaf on a roof?
A) Increased insulation
B) Improved aesthetics
C) Reduced weight
D) Fire hazard
  • 23. Why is a smoky fire sometimes built under thatch during construction?
A) To provide light
B) To keep the workers warm
C) To help the thatch dry
D) To discourage insects
  • 24. Which tree's bark is best known for its waterproof qualities?
A) Birch
B) Pine
C) Oak
D) Maple
  • 25. What should be considered when harvesting materials from protected lands?
A) That the forest won't mind
B) Regulations and permits
C) That no one is watching
D) That the best materials are always available
  • 26. What technique can improve water runoff with leaf roofing?
A) Using only one layer of leaves
B) Spreading the leaves out flat
C) Punching holes in the leaves
D) Creating a layered, shingled effect
  • 27. What type of knot is most secure for lashing roofing materials?
A) Square knot
B) Overhand knot
C) Granny knot
D) Slip knot
  • 28. What is an advantage of using natural materials for roofing?
A) Sustainability
B) Easiest installation
C) Highest durability
D) Lowest cost
  • 29. What can be used to create a smoke hole in a thatched roof?
A) Carefully planned opening
B) Missing thatch
C) A window
D) Random hole
  • 30. What is the first step in building a waterproof roof?
A) Starting at the top
B) Installing flashing
C) Buying expensive tools
D) Planning and material gathering
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