Preserving Timber

Question 1

What should wood be protected from

Answer 1

Weather
Wear+ tear
Insect and fungi attacks

Question 2

What are the 3 main types of preservatives used for wood

Answer 2

1. Tar oil
2. Water borne
3. Solvent based

Question 3

What is a preservative

Answer 3

Preservatives protect the wood by creating a barrier that stops fungi + insects from attacking the wood

Question 4

Name 2 advantages and disadvantages of tar oils

Answer 4

ADV
1. Cheap
2. Toxic to insects
DISADV
1. Strong smell
2. Toxic to plants

Question 5

Name 2 advantages and disadvantages of water-borne preservatives

Answer 5

ADV
1. Timber is clean after treatment
2. Odourless
DISADV
1. Can’t be washed out of wood
2. Doesn’t protect against weathering

Question 6

Name 2 advantages and disadvantages of solvent based preservatives 

Answer 6

ADV
1. Can be used indoors and outdoors
2. Can be painted over
DISADV
1. Fire hazard
2. Can have a strong smell

Question 7

Name 2 ways in which preservatives can be applied

Answer 7

1. Using a brush
2. Dipping the wood into the preservative