3.1001.4 General Penetrations (Electrical, HVAC, Plumbing, Vent Termination, Recessed Lighting)

Topic: 
Attics
Subtopic: 
Penetrations and Chases
Desired Outcome: 
Penetrations sealed to prevent air leakage and moisture movement between unconditioned and conditioned space
TitleSpecification(s)Objective(s)
3.1001.4a
Work assessment

Installer prework assessment will be conducted to determine:

  • Structural integrity
  • Roof leaks
  • Insect infestation
  • Accessibility
  • Number, type, size, and location of penetrations

Ensure work space is safe and ready for air sealing

Verify scope of work

3.1001.4b
Air sealing penetrations

Backing or infill will be provided as needed to meet the specific characteristics of the selected material and the characteristics of the penetration or hole

The infill or backing will not bend, sag, or move once installed

All accessible damaged vapor barrier Vapor barrier A material that retards the passage of water vapor and contains a perm rating of less than 1 will be repaired

Penetration through the air barrier Air barrier The separation between the interior and exterior environments of a building that slows air flow to the point that no smoke movement is visible at 50 pascals of pressure difference across the boundary will be repaired

Ensure closure is permanent and supports any load (e.g., wind, insulation, mechanical pressures)

Ensure sealant is effective and durable

3.1001.4c
Sealant selection

Sealants will be used to fill holes no larger than recommended by manufacturer specifications

Sealants will be compatible with all adjoining surfaces

Sealants will be continuous and meet fire barrier specifications, according to authority having jurisdiction

Create a permanent seal

Ensure sealant meets or exceeds the performance characteristics of the surrounding materials

Create a continuous seal

3.1001.4d
Ceiling hole repair

Ceiling repair material must meet or exceed strength of existing ceiling material

Ceiling repair must span from truss to truss or add blocking as needed for support

The backing or infill will not bend, sag, or move once installed

All accessible damaged vapor barriers will be repaired

Penetrations through the air barrier Air barrier The separation between the interior and exterior environments of a building that slows air flow to the point that no smoke movement is visible at 50 pascals of pressure difference across the boundary must be repaired

Ensure ceiling is structurally sound

Minimize air leakage

Ensure closure is permanent and supports expected wind and mechanical pressure loads

Ensure sealant does not fall out

3.1001.4e
Materials

Materials will be used or installed in accordance with product manufacturer specifications

Select materials to ensure durable and permanent repair

3.1001.4f
High temperature application

Only noncombustible materials will be used in contact with chimneys, vents, and flues

Local codes will be referenced

Prevent a fire hazard