Figure 9: Bottom Side Approach — Columns are still thermal bridges that can be a real problem in very cold climates like climate zone 8 and climate zone 9 — in which case small heaters are added to this space or the columns wrapped with «heat tape.» (buildingscience.com)
Short Pump purchased 4 - foot by 6 - foot carts that feature small heaters. (nreionline.com)
Note that with this approach the columns are still thermal bridges that could be a real problem for you in very cold climates like climate zone 8 and climate zone 9 — in which case small heaters are added to this space or the columns wrapped with «heat tape» - no kidding. (buildingscience.com)