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.
  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.