What can cause defects in timber?

What can cause defects in timber?

Defects in timber due to Natural Forces

• Wind cracks.
• Shakes.
• Twisted fibers.
• Upsets.
• Rind galls.
• Burls.
• Water stain.
• Chemical stain.

What are timber defects?

A Defect is taken to be any irregularity occurring in or on the timber which may lower its strength, durability, utility value or diminish its appearance. Defects may be ‘natural’ which occur whilst the tree is growing, or ‘artificial’ as a result of poor conversion, seasoning or handling after felling.

What are the natural defects in timber?

Most common natural defects are: knots, shakes, cross grain, crookedness, rind galls, burr, and curl.

1. KNOTS. A knot marks the position of growth of a branch on the tree.
2. SHAKES. After knots, shakes are more serious and common defects in timber.
3. CROSS GRAIN.
4. RINDGALLS etc.
5. REACTION WOOD.

What are the main defects in timber?

The followings are the five main types of defects in timber:

• Defects due to Natural Forces.
• Defects due to Attack by Insects.
• Defects due to Fungi.
• Defects due to Defective Seasoning.
• Defects due to Defective Conversion.

  What is the difference between natural and artificial defects in timber?

  Natural defects: Present in a growing tree, such as growth defects, grain irregularity, shakes and knots. Artificial defects: Caused by careless handling, incorrect conversion and seasoning techniques and inadequate protection of timber.

  What is wet rot in timber?

  What is Wet Rot? Wet rot is the natural decay of timber due to high moisture levels. Wet rot is caused by a fungus that is attracted to very damp wood and feeds off the timber, destroying it in the process. There are many different types of fungus, but Coniophora puteana, also called cellar fungus, is the most common.

  What are the three main types of timber?

  Types of timber

  • Bamboo.
  • Birch.
  • Cane.
  • Cedar.
  • Cherry.
  • Cross-laminated timber.
  • Engineered bamboo.
  • Glulam.

  How many months are required for natural seasoning of timber?

  Natural seasoning is the process in which timber is seasoned by subjecting it to the natural elements such as air or water. Natural seasoning takes nearly 4 – 6 months for felled trees.

  What is a dead knot in timber?

  Knots. A knot is where a branch was connected to the tree. There are two different types of knot, a live knot and a dead knot. A live knot is usually lighter in colour and will generally never fall out. A dead knot is darker and can fall out leaving a hole which can have an effect on the strength of timber.

  What is the importance of seasoning of timber?

  Seasoning is the process of drying timber to remove the bound moisture contained in walls of the wood cells to produce seasoned timber. Seasoning can be achieved in a number of ways, but the aim is to remove water at a uniform rate through the piece to prevent damage to the wood during drying (seasoning degrade).

  What are the signs that timber is affected by wet rot?

  Wet rot can be identified through the following features:

  • Dark brown staining on the timber.
  • Splitting or longitudinal cracking along the grain of the timber.
  • A damp, musty smell.
  • Timber that is damp to touch.
  • Localised fungus growing on the timber.
  • The affected area is darker in colour than the surrounding timber.

  Can you treat wet rot yourself?

  Can Wet Rot Be Treated Yourself? Here at Timberwise we would recommend that you get a professional wet rot expert to deal with wet rot issues. This is because it is not only the wet rot that needs to be treated, but the root cause of the excess moisture needs to found and fixed too.

  Why are there defects in my timber board?

  Timber defects refers to imperfections that occur in timber boards. Defects can occur through a number of reasons. During the drying process of timber, if the wood is not dried in the correct manner, stresses in the wood can occur, making it difficult to work it or impossible to use for a certain project.

  What’s the best way to deal with wood defects?

  In reality, though, wood is far from perfect. Even the best grades often suffer from one or more of the defects shown in these drawings. The best way to deal with lumber defects is, of course, to avoid questionable boards in the first place.

  What are the different types of defects in wood?

  However some defects can be beneficial for a specific type of work, for example, twisted wood is good for making a bowl out of timber. The followings are the five main types of defects in timber: These timber defects are briefly discussed below. Knots: Knots are the most common defects caused due to natural forces.

  Why are some timbers not good for sawing?

  Twisted Fibers in Timbers When the tree in its younger age is exposed to high speed winds, the fibers of wood gets twisted. This type of wood is not suitable for sawing. So, this can be used for making poles, posts etc. 4. Upsets

  Timber defects refers to imperfections that occur in timber boards. Defects can occur through a number of reasons. During the drying process of timber, if the wood is not dried in the correct manner, stresses in the wood can occur, making it difficult to work it or impossible to use for a certain project.

  In reality, though, wood is far from perfect. Even the best grades often suffer from one or more of the defects shown in these drawings. The best way to deal with lumber defects is, of course, to avoid questionable boards in the first place.

  What can I do about timber decay in my home?

  Once any timber decay repair work has been completed, it is recommended that you install an electronic system to monitor the moisture content in and around the problem areas of your home. Any building defects that may lead to leaks or prolonged dampness can then be detected early and summarily dealt with.

  Twisted Fibers in Timbers When the tree in its younger age is exposed to high speed winds, the fibers of wood gets twisted. This type of wood is not suitable for sawing. So, this can be used for making poles, posts etc. 4. Upsets