Roof Sailing Roof Ventilation Systems

Question 1

What is the primary purpose of proper attic ventilation in a roofing system?

Accepted Answer

To regulate temperature and moisture levels in the attic

Answer

To reduce the weight of the roof

Answer

To improve the appearance of the roofline

Answer

To increase solar panel efficiency

Question 2

According to FHA and most building codes, what is the minimum net free ventilation area (NFVA) required per square foot of attic floor?

Accepted Answer

1/150

Answer

1/100

Answer

1/300

Answer

1/600

Question 3

In a balanced ventilation system, intake vents are located where on the roof assembly?

Accepted Answer

At the soffit or eaves

Answer

At or near the ridge

Answer

In the gable ends only

Answer

Just below the ridge

Question 4

Which type of roof vent is installed at the peak of the roof and runs continuously along the ridge?

Accepted Answer

Ridge vent

Answer

Turbine vent

Answer

Power attic vent

Answer

Soffit vent

Question 5

What problem can occur when a power attic ventilator (PAV) is installed without adequate intake ventilation?

Accepted Answer

The PAV draws conditioned air from the living space, increasing energy costs

Answer

Roof deck delamination

Answer

Ice dam formation

Answer

Shingle granule loss

Question 6

Which condition is a direct result of insufficient attic ventilation during winter months?

Accepted Answer

Ice dam formation at the eaves

Answer

Premature shingle cracking

Answer

Sagging roof deck

Answer

Accelerated granule loss