Roof Flashing

Question 1

What is a stack or vent terminal?

Answer 1

The outlet of a pipe which equalizes the atmospheric pressure within the plumbing system

Question 2

Why do we install roof flashing?

Answer 2

To prevent water from leaking into the building

Question 3

What is flashing?

Answer 3

A piece of sheet material, which is secured to both the pipe and the roof in such a way as to deflect any water flowing onto it

Question 4

Name three OBC permissible materials for roof flashing

Answer 4

Copper sheet aluminum sheet lead sheet

Question 5

In the case of a shingled pitched roof, the flashing must be located where

Answer 5

Under the shingles on the upper side and on top of the shingles on the downward side

Question 6

What is used to secure the flashing to the roof under the shingles?

Answer 6

Roofing nails

Question 7

If the vent terminal extends a distance of ____ meters above the roof level, _____ must be installed to secure the terminal against high winds

Answer 7

2 meters
Tie down wires

Question 8

What is the size minimum size for a shingle roof flashing?

Answer 8

500 mm x 500 mm

Question 9

What are the ways to protect against frost

Answer 9

The OBC code recommends that the vent terminal be increased by one pipe diameter above 150 mm or by insulating the pipe
Also a heat tracing cable can be installed
The vent terminal shall be installed higher than the top level of the snow

Question 10

Roof flashing is installed to ____ water from_____ into the building

Answer 10

Prevent
Leaking

Question 11

The flashing used must be approved by the

Answer 11

OBC

Question 12

The minimum height of any stack terminal is

Answer 12

6 inches high

Question 13

The flashing is to be installed by the

Answer 13

Plumbing contractor, but really roofer

Question 14

The installation of a flashing must not_______ the stack terminal in anyway

Answer 14

Obstruct

Question 15

If the roof is flat, the flashing should be______ layers of roofing material, which will then _____ to the flashing

Answer 15

Between
Seal

Question 16

If the vent terminal extends a distance of 2 m above roof level _______ must be installed to secure the vent terminal against

Answer 16

Tie down wires
High winds

Question 17

If the stack and vent is installed during temperatures of 80°F, the dome should be compressed approximately ______ before waterproofing joint is completed to the pipe in order to allow for movement

Answer 17

1/2”