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Causes of Wall Cracks and Bowing in Building Structures

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Causes of Wall Cracks and Bowing in Building Structures

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Questions and Answers

What is a common cause of inadequate bearing capacity in the foundation?

Overloading due to heavy traffic

Chemical reaction from sulphate attack

Withdrawal of ground water by prolonged drought (correct)

Freezing and thawing of water

Which activity can contribute to disintegration of foundations?

Vibrations from heavy traffic

Freezing of water in upper layers

Growing trees nearby

Plugging of drains (correct)

What can cause cracks in raft slabs?

Chemical reaction from sulphate attack

Vibrations from machinery

Excessive lateral pressure from active earth pressure

Non provision of expansion joints (correct)

Which factor contributes to differential settlement in foundation?

Shrinkage of clay subsoils Signup and view all the answers

What can lead to stone staining?

Sulphate attack on cement concrete Signup and view all the answers

How can brick efflorescence occur?

Non provision of expansion joints Signup and view all the answers

What is a common cause of cracking in non-load bearing walls filled with light weight concrete blocks/panels?

Inadequate support at base Signup and view all the answers

What can cause brick panels to outwardly bow?

Expansion of bricks due to moisture Signup and view all the answers

What is a common cause of concrete panel issues related to rainwater not clearing off the surface?

Inadequate projections to keep rainwater clear off surface Signup and view all the answers

What is a common cause of stone staining as described in the text?

Sulphate attack Signup and view all the answers

Surface disintegration in concrete can be caused by:

Sulphate attack Signup and view all the answers

What can lead to cracks and fixing defects in glass panels?

Non-matching shape of glass and the frame Signup and view all the answers

What is a common cause of cracks in structural substrate panels?

Physical impact Signup and view all the answers

What can lead to poor crack bridging capacity in a substrate?

Excessive deformation and stresses in substrate Signup and view all the answers

What is a common cause of blistering in liquid membranes?

Entrapment of air or moisture Signup and view all the answers

What is a consequence of improper storage of factory-produced membranes?

Folding and ridging/rippling Signup and view all the answers

What is a common cause of splitting in polymer roofing?

Mechanical damage by dropping stones and nails Signup and view all the answers

What is a primary reason for leakage in polymer roofing?

Inadequate bonded joints Signup and view all the answers