3.1701.1 Holes, Penetrations, and Connection Seam

Topic: 
Additions
Subtopic: 
Attached Additions
Desired Outcome: 
The exterior of the seam is weathertight and connection between house and addition is properly sealed to minimize air leakage and moisture movement between unconditioned and conditioned space
TitleSpecification(s)Objective(s)
3.1701.1a
Work assessment

Installer prework assessment will be conducted to determine:

  • Structural integrity
  • Roof leaks
  • Insect infestation
  • Accessibility
  • Mechanical attachment
  • Location of marriage wall seams
  • Number, type, size, and location of penetrations

Ensure work space is safe and ready for air sealing

Verify scope of work

3.1701.1b
Hole, seam, line, and penetration sealing

Marriage wall seams will be sealed continuously at walls, floors, and ceiling connection

All accessible holes and penetrations in the addition envelope Envelope The separation between the interior and exterior environments of a building that includes a combination of air and thermal barrier will be sealed

Backing or infill will be provided as needed, when accessible

Minimize air leakage

Maintain durability and/or flexibility

Ensure sealant is effective and durable

3.1701.1c
Materials

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

Select materials to ensure durable and permanent repair

3.1701.1d
Addition exterior wall air sealing

All holes and penetrations on exterior surface of exterior walls will be sealed to ensure resistance to outdoor elements

Intentionally ventilated walls will not be sealed at vent locations (e.g., weep holes)

All holes and penetrations on the interior surface of exterior walls will be repaired

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

Minimize air leakage

Maintain durability

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

Ensure sealant is effective and durable

3.1701.1e
Addition interior wall air sealing

All accessible holes and penetrations in top and bottom plates will be sealed

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

Minimize air leakage

Maintain durability

Ensure resulting closure is permanent and supports expected load

Ensure sealant is effective and durable

3.1701.1f
Addition floor air sealing (decking, subfloor, floor decking)

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

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

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

Ensure sealant is effective and durable

3.1701.1g
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, if required

Create a permanent seal

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

3.1701.1h
Floor repair

Floor repair material will meet or exceed strength of existing floor material

Repair will span from joist to joist and blocking added as needed to support floor

Patches smaller than 144 square inches will not require repairs from joist to joist

Floor repair material will be glued, fastened, and air sealed

Ensure floor is structurally sound

Minimize air leakage

3.1701.1i
Structural materials

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

Select materials to ensure durable and permanent repair

3.1701.1j
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

3.1701.1k
High temperature application

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

Prevent a fire hazard