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How To Repair Plenum Boards

How to Make a Duct Board Plenum

Duct lath consists of compressed fiberglass backed with a foil vapor barrier. The insulating qualities of compressed fiberglass reduces the temperature loss from air moving through the plenum and stops condensation from forming on the exterior surface of the duct plenum.

Excessive condensation will damage finished materials surrounding the plenum and cause mold to grow in dampened wooden framing components. Properly cut and seaming the duct board plenum volition ensure minimal damage from condensation.

  1. Set a piece of duct board on a house surface with the foil vapor barrier sitting on the piece of work surface.

  2. Mark the duct board. Pull the record mensurate forth the piece of duct lath. Mark 1-1/2 inches in from ane end of the duct board with a soapstone. From the 1-1/2-inch marking, measure the height of your duct plus 1-3/four inches and place another soapstone mark. Mark the remaining width and height locations, adding 1-3/4 inches to each dimension. Set the curt side of the T-square confronting the side of the duct board. Align the long edge with a cut mark. Pull the soapstone along the border of the T-square to mark the line. Repeat the process to mark each cut line, including the 1-1/two-inch mark placed near the end of the duct board.

  3. Lay the duct board knife flat between the duct lath and the foil vapor bulwark with the tip of the knife pointing toward the one-i/2-inch line. Slide the duct board knife along the width of the duct board. Drag the knife perpendicular along the ane-1/2-inch mark. Remove the 1- 1/two-inch slice of cutting insulation.

  4. Pull the V-groove tool along each marked cut line. Keep the flat section of the V-groove tool flat against the peak of the duct board to ensure the notch is at the proper depth. Remove the notched insulation from each groove.

  5. Fold the duct board to align the 1-1/2-inch foil flap with the far border of the duct lath.

  6. Fold the foil flap over and staple the flap to the duct lath. Seal the connection with a length of foil tape.

  7. Cut ii pieces of duct board six inches longer and wider than the within opening of the plenum.

  8. Place soapstone marks 3 inches in from each edge of the cut end pieces. Extend each mark with the T-square.

  9. Remove the insulation from around the edges of the pieces with the duct board knife as described earlier.

  10. Secure the terminate caps to the plenum. Push button the cut pieces in each open end of the plenum. Slit the foil vapor barrier extending beyond the edges of the duct board with a duct board knife. Fold the ends of the foil onto the outside of the duct lath. Staple the foil to the duct board. Tape the flaps down with foil tape to complete the duct board plenum.

  11. Tip

    Article of clothing long clothing and a respirator to avert irritation from the fiberglass fibers.

The Drip Cap

  • Duct board consists of compressed fiberglass backed with a foil vapor barrier.
  • Properly cutting and seaming the duct lath plenum will ensure minimal damage from condensation.
  • From the 1-1/ii-inch mark, measure the height of your duct plus 1-3/four inches and identify another soapstone mark.
  • Pull the V-groove tool forth each marked cut line.
  • Extend each marking with the T-foursquare.
  • Slit the foil vapor barrier extending beyond the edges of the duct board with a duct board knife.
  • Fold the ends of the foil onto the outside of the duct board.

Source: https://homesteady.com/12358070/how-to-make-a-duct-board-plenum

Posted by: hansonnotne1961.blogspot.com

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