Air-Vapor Barrier Box

Installation Instructions

LESSCO AIR-VAPOR BARRIER BOX INSTALLATION INSTRUCTIONS
FOR ELECTRICAL CONTRACTOR

If you should experience an unforeseen problem, you can contact us at (920) 533-8690.

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Install electrical box inside of the LESSCO® Box. Use hinge feature if needed.

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Install wiring through the LESSCO® Box into electrical box.

 

  1. Attach the LESSCO® Air-Vapor Barrier Box to the wall or ceiling framing member.
    • If the nailing configuration or size of the electrical box requires, cut the top and bottom of the new, improved LESSCO® Box where indicated. This allows the hinge action to take place. Then attach the LESSCO® Box as in step one.
  2. Install standard electrical box inside of the LESSCO® Box.
    • NOTE: Steps #1 and #2 can be accomplished simultaneously by holding electrical box inside LESSCO® Box, then attaching electrical box to framing member.
    • If the hinge action is being used, simply swing the outward portion of theLESSCO® Box away to provide more room to attach the electrical box.
  3. Make a small cut for wiring where indicated on the top or bottom of the LESSCO® Box. Make only one small cut for each wire. DO NOT make one large hole for 3 or 4 wires.
  4. Install wiring through the LESSCO® Box into electrical box. Complete wiring as usual.
    • If the hinge feature is being used, DO NOT run the wire through the opening created by the cut made for the hinge option.

LESSCO AIR-VAPOR BARRIER BOX INSTALLATION INSTRUCTIONS
FOR AIR SEALING/INSULATION CONTRACTOR

If you should experience an unforeseen problem, you can contact us at (920) 533-8690.

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Seal wires with acoustical sealant or silicone caulk.

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If hinge feature was used, tape openings at top/bottom of LESSCO® Box.

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Insulate cavity as usual.

 

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Cut air barrier at center of flanges of LESSCO® Box.

Tape the air barrier to the flanges of the LESSCO® Box

Tape the air barrier to the flanges of the LESSCO® Box

 

  1. Seal completely around the wires with acoustical or silicone sealant.
    • If the hinge option was used, the cut made at the top and bottom of theLESSCO® Box must now be taped shut with 3M Contractor’s Sheathing Tape.
  2. Insulate cavity as usual. Then install the continuous high quality air barrier.
    • If using the Airtight Drywall Approach (ADA), gaskets are now attached to the flanges of the LESSCO AVB Box.  Proceed to step #5.
  3. Cut air barrier at center of flanges of LESSCO® Box.
  4. Tape the air barrier to the flanges of the LESSCO® Box with a good quality, air barrier tape.
    • Make sure the 3M tape is folded into the insides of the LESSCO® Box to create a long lasting airtight seal.
      *3M blue 72 adhesive can also be used to seal the air/vapor barrier to theLESSCO® box, if desired.
  5. Insulate around the electrical box inside the LESSCO® Box. Your airtight installation is now complete.
  6. Apply finish wall or ceiling material as usual.