Shiplap Method of Fiberglass Duct Board Fabrication
The "Shiplap Method" of fiberglass duct board fabrication creates a secure and more stable end product. Although the results are superior to other methods, the Shiplap Method of fiberglass duct board fabrication does require a minimum of 3 tools (4 tools for 2" thick board).
The Tools Required for the Shiplap Method of Fibergalss Duct Board Fabrication:
1" Board: 2 Way Tool (Cuts #2, #3 & #4)
Black Tool: Female Shiplap Cut
Shiplap Method- Measurement Dimensions:
- Determine Total Board Length: Add all of the ID (inside dimensions) of all four sides of the finished duct + the add on.
- 1" Thick Board Add On: 6-5/8"
- 1-1/2" Thick Board Add On: 10-3/8"
- 2" Thick Board Add On: 4-7/8"
- Draw all Lines on the Board for the cuts. For the distance between lines, take the ID of the finished duct + the add on (see image below). Make sure to take the add on for the correct board thickness as the add on measurements vary by board thickness.
- Use the Black or Grey Tool to cut the first (left) edge.
- Use the Orange Tool to make the cut on the 2nd line. Cut with the #2/4 end of the tool. There is a center line on the front of the Orange Tool's handle base, make sure to line up that notch with the line on the board.
- Use the Orange Tool (reverse the tool if a "2 Way" tool) and use the #3 end of the tool to make the third cut. If using 2" board, use the Left Tool (#3 cut).
- Use the Orange Tool to make the cut on the 4th line. Cut with the #2/4 end of the tool. If using 2" board, use the Right Tool (#2/4)
- For the last cut, use the Blue Tool (Without Shiplap & Without Skinner). Make sure to line the center mark on the tool with the line on the board.
- Remove all scrap from the board and fold the board inwards to form the finished duct. Take the paper from the end cut and staple/tape to the other end of the board. Use of glass fab mesh and mastic on the seams are recommended to prevent air leakage.