Condensation

Question 1

Define condensation

Answer 1

Warm moist water vapour comes in contact with a cold surface and turns in water.

Question 2

Two types of condensation

Answer 2

Surface and interstitial

Question 3

5 Damages caused by condensation

Answer 3

Mould
Damage to decorations and fittings
Corrosion and decay of the building fabric
Structural failure
Less thermal resistance

Question 4

Examples of adverse health effects

Answer 4

Respiratory infections
Allergic disease
Irritative and non-specific symptoms
Chronic pulmonary diseases such as bronchitis

Question 5

What causes adverse health effects?

Answer 5

Prolonged dampness in building materials can cause proliferation of a number of fungal and bacteria

Question 6

Sources of Condensation

Answer 6

People
Cooking
Clothes washing
Clothes drying
Industrial Processes

Question 7

How to control surface condensation

Answer 7

Reduce the generation of moisture
Increase ventilation
More insulation
Increasing heat input

Question 8

How to control interstitial condensation

Answer 8

Use vapour barrier
Raise internal temperature
Select materials to ensure any part of the structure is above dew point temperature