Title
The importance of roof drain height
The importance of roof drain height
Date
11/2020
11/2020
Author(s)
Mark Graham
Mark Graham
Page(s)
18-20
18-20
Keyword(s)
roof; drain; deck; plumbing; drawings
roof; drain; deck; plumbing; drawings
Abstract
Proper roof drain height above a roof deck is an important design consideration and integral part of properly draining a roof system’s surface. For a new construction project, roof drain placement usually is identified to the plumbing contractor in the construction document’s plumbing drawings, and the specific roof drain intended is identified in the plumbing specifications. Unfortunately, when designing plumbing systems, plumbing system designers and plumbing contractors usually have little knowledge of a building’s specific roof system design and the intended thickness of any above-deck roof insulation. Unless the topic of roof drains specifically is raised in a project construction meeting, the plumbing contractor usually places roof drains based on his or her previous experience. This may result in unintended conditions for the roofing contractor to address in the field.
Proper roof drain height above a roof deck is an important design consideration and integral part of properly draining a roof system’s surface. For a new construction project, roof drain placement usually is identified to the plumbing contractor in the construction document’s plumbing drawings, and the specific roof drain intended is identified in the plumbing specifications. Unfortunately, when designing plumbing systems, plumbing system designers and plumbing contractors usually have little knowledge of a building’s specific roof system design and the intended thickness of any above-deck roof insulation. Unless the topic of roof drains specifically is raised in a project construction meeting, the plumbing contractor usually places roof drains based on his or her previous experience. This may result in unintended conditions for the roofing contractor to address in the field.