Lecture 15 - NZBC Clauses E And H

Question 1

What are the 3 subclauses of E - Moisture?

Answer 1

E1 - Surface water
E2 - External moisture
E3 - Internal moisture

Question 2

What are the two Objectives of E1?

Answer 2

1. Safeguard people from injury or illness from damage caused by surface water
2. Protect outfalls of drainage systems

Question 3

What is the Functional Requirement of E1?

Answer 3

Buildings and sitework shall be constructed in a way that protects people from adverse effects of surface water

Question 4

What is the Performance requirement of E1?

Answer 4

• 10% chance surface water won’t be a nuisance
• 2% chance surface water won’t enter the building
• Drainage

Question 5

What is the Objective of E2?

Answer 5

Safeguard people from illness or injury resulting from EXTERNAL MOISTURE entering the building

Question 6

What is the Functional Requirement of E2?

Answer 6

Buildings constructed to provide adequate RESISTANCE to PENETRATION and ACCUMULATION of moisture from the outside

Question 7

What is the Weather-tightness requirement of E2?

Answer 7

• Water is prevented from PENETRATING and ACCUMULATING behind cladding in amounts that can cause dampness or damage to the building elements
• Dry inside the cladding

Question 8

What are the 2 Objectives of E3?

Answer 8

1. Safeguard people from illness or injury from damage caused by accumulation of internal moisture
2. Protect household units from damage caused by free water from another household unit in the same building

Question 9

What are the 3 Functional Requirements of E3?

Answer 9

Avoid likelihood of:

1. FUNGAL GROWTH / accumulation of CONTAMINANTS on linings and building elements
2. FREE WATER OVERFLOW penetrating to an adjoining household unit
3. DAMAGE to BUILDING ELEMENTS caused by moisture

Question 10

What are the 4 Performance requirements of E3?

Answer 10

1. Combination of thermal resistance, ventilation and space temperature provided to all habitable spaces where moisture may accumulate
2. Freewater from accidental overflow from sanitary fixtures must be disposed of in a way that avoids damage
3. Floor, wall, building element surfaces likely to be splashed must be IMPERVIOUS and EASILY CLEANABLE
4. Surfaces of building elements likely to be splashed CONSTRUCTED in a way that prevents splash from PENETRATING BEHIND linings or into concealed spaces

Question 11

What is the Objective of H1 - Energy efficiency?

Answer 11

To facilitate efficient use of energy

Question 12

What is the Functional Requirement of H1?

Answer 12

Building constructed to achieve adequate degree of energy efficiency when that energy is used for:

1. Modifying temperature, humidity, providing ventilation
2. Providing hot water to sanitary fixtures/appliances
3. Providing artificial lighting

Question 13

What is the Performance requirement of H1?

Answer 13

Spaces in the building where temperature or humidity are modified must be constructed to-

1. Provide thermal resistance
2. Limit uncontrollable airflow

Question 14

What is the Building Performance Index (BPI)?

Answer 14

1.55 kWh/DM m^2 heat required to maintain 20 degrees Celcius