Tenting of Wet Sprinkler Systems

Detail ID 3.0103.4
Topic
General Pressure Boundary
Subtopic
Intentional Attic Openings
Desired Outcome

Contiguous thermal and pressure boundary that prevents sprinkler system from freezing

SF Single Family Site-Built Housing
MH Manufactured Housing
MF Multifamily Housing

Specifications

  • SF
  • MF
Specification Objective

Select sealants that:

are compatible with their intended surfaces,

allow for differential expansion and contraction between dissimilar materials,

meet the requirements of the applicable fire safety code (e.g. thermal or ignition barriers), and

for use inside the pressure boundary select low volatile organic compound (VOC) sealants that meet independent testing and verification protocols

Select safe and effective sealants

  • SF
  • MF
Specification Objective

Select materials that:

adequately support applied load and are permanent air barriers,

meet the requirements of the applicable fire safety code (e.g. thermal or ignition barriers), and

for use inside the pressure boundary select low volatile organic compound (VOC) materials that meet independent testing and verification protocols

Select safe and effective materials

  • SF
  • MF
Specification Objective

Install a rigid enclosure around entire sprinkler system exposed within the attic maintaining a minimum 3" clearance from all portions of the system

Durably enclose entire sprinkler system

  • SF
  • MF
Specification Objective

Insulate enclosure to an equivalent R-value as the rest of the attic

Prevent sprinkler system from freezing

  • SF
  • MF
Specification Objective

Apply a continuous seal at all seams, cracks, joints, edges, penetrations, and connections of the enclosure while applying sufficient pressure to push sealant into any gaps or cracks and contact any backing or infill material required

Sealant exposed to the interior of the enclosure must meet the same fire rating as the enclosure

Fully adhered, safe, and durable sealant

  • SF
  • MF
Specification Objective

Install only noncombustible materials and sealants with an ASTM E136 listing in contact with any device producing 200 degrees F or more (chimneys, vents, flues, etc.)

Foam plastics, where permissible, will be provided with ignition and thermal barriers as required by applicable fire safety code

Prevent fire hazards

Previous Detail:
Whole-House Fan - Operable
View Sub-Topic:
Intentional Attic Openings