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// CODE SNIPPET

502.4.3 Continuous Air Barrier

2010 Energy Conservation Code of NY > 5 Commercial Energy Efficiency > 502 Building Envelope Requirements > 502.4 Air Leakage (Mandatory) > 502.4.3 Continuous Air Barrier
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Except in unheated structures and as permitted by this section, a continuous air barrier shall be installed; sealing all seams, openings, and penetrations of the building and shall be sealed with caulking materials or closed with gasketing systems compatible with the construction materials and location. Joints and seams shall be sealed in the same manner or taped or covered with a moisture vapor-permeable wrapping material. Sealing materials spanning joints between construction materials shall allow for expansion and contraction of the construction materials. Such air barrier shall have all the following characteristics:
  1. Continuous throughout the envelope with all joints and seams sealed and with sealed connections between all transitions in planes and changes in materials and at all penetrations.
  2. Joined and sealed in a flexible manner to the air barrier component of adjacent assemblies, allowing for the relative movement of these assemblies and components.
  3. Installed in accordance with the manufacturer's instructions and in such a manner as to achieve the performance requirements.
  4. Penetrations of the continuous air barrier shall be made in a way such that the integrity of the continuous air barrier is maintained.

502.4.3.1 Compliance

Compliance for continuous air barriers may be demonstrated using any one of the following three methods:
  1. Materials. Using individual materials that have an air permeability not to exceed 0.02 L/s • m2 under a pressure differential of 75 Pa [0.004 cfm/ft2 under a pressure differential of 0.3 in. water (1.57 lb/ft2)] when tested in accordance with ASTM E 2178.
  2. Assemblies. Assemblies of materials and components shall have an average air leakage not to exceed 0.2 L/s•m2 under a pressure differential of 75 Pa [0.04 cfm/ft2 under a pressure differential of 0.3 in. water (1.57 lb/ft2)] when tested in accordance with ASTM E 2357 or ASTM E 1677. In addition these assemblies must meet the requirement for joints per Section 502.4.3.
  3. Building. Testing the completed building and demonstrating that the air leakage rate of the building envelope does not exceed 2.0 L/s•m2 under a pressure differential of 75 Pa [0.4 cfm/ft2 at a pressure differential of 0.3 in. water (1.57 psf)] in accordance with ASTM E 779 or an equivalent approved method.

Related Code Sections


502.4.3 Commercial Energy Efficiency, Continuous Air Barrier
Except in unheated structures and as permitted by this section, a continuous air barrier shall be installed; sealing all seams, openings ...
2010 Energy Conservation Code of NY > 5 Commercial Energy Efficiency > 502 Building Envelope Requirements > 502.4 Air Leakage (Mandatory) > 502.4.3 Continuous Air Barrier
C402.2.7 [CE] Commercial Energy Efficiency, Airspaces
airspace is located on the interior side of the continuous air barrier and is bounded on all sides by building components. Exception: The thermal ...
2020 Energy Conservation Code of NYS > 4 [CE] Commercial Energy Efficiency > C402 Building Envelope Requirements > C402.2 Specific Building Thermal Envelope Insulation Requirements (Prescriptive) > C402.2.7 Airspaces
N1103.3.7 [RE] Energy Efficiency, (R403.3.7) Ducts Located in Conditioned Space
completely within the continuous air barrier and within the building thermal envelope . The ducts are buried within ceiling insulation in accordance ...
2020 Residential Code of New York State > 11 [RE] Energy Efficiency > N1103 (R403) Systems > N1103.3 (R403.3) Ducts > N1103.3.7 (R403.3.7) Ducts Located in Conditioned Space
R403.3.7 [RE] Residential Energy Efficiency, Ducts Located in Conditioned Space
be located completely within the continuous air barrier and within the building thermal envelope . The ducts shall be buried within ceiling insulation ...
2020 Energy Conservation Code of NYS > 4 [RE] Residential Energy Efficiency > R403 Systems > R403.3 Ducts > R403.3.7 Ducts Located in Conditioned Space
C402.5.1 [CE] Commercial Energy Efficiency, Air Barriers
A continuous air barrier shall be provided throughout the building thermal envelope. The air barriers shall be permitted to be located on the inside ...
New York State Energy Conservation Construction Code (NYSECCC) > 4 [CE] Commercial Energy Efficiency > C402 Building Envelope Requirements > C402.5 Air Leakage—Thermal Envelope (Mandatory) > C402.5.1 Air Barriers
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