Plank Make — Lunar Logs to Planks
Plank Make turns a log into a plank for the sawmill fee plus 2 astral and 15 earth. Construction players buy planks on the GE; you sell the spread. Some weeks oak prints, some weeks mahogany is negative. Check prices before you buy a load of logs.
Skip if: the GE spread is gone, you do not have 86 Magic / Dream Mentor, or you would rather run the sawmill without the spell.
Only if the spread exists
Plank Make on Lunar
Banking at Lunar Isle
Click intensive, zero combat
Requirements- 86 Magic — Plank Make
- Lunar Diplomacy then Dream Mentor
- Astral runes + earth runes (or an earth staff / mud battlestaff / tome of earth)
- Cash for the sawmill fee on every cast, plus a log stack
Rune pouch for astrals. Lunar Isle bank is the usual spot. Steam staff / tome of fire do nothing here — the spell spends earth, not fire.
How to run it- Check oak, teak, and mahogany log → plank on the GE tracker. Subtract sawmill fee + rune cost.
- Buy the log that is actually green. If none are, stop.
- Lunar spellbook, earth staff, inventory of logs, cast Plank Make until the inv is planks.
- Bank, repeat. Sell planks. Do not sit on a 10k stack if the margin flips overnight.
What actually drives profit| Log | Sawmill fee | Notes |
|---|---|---|
| Oak | 250 | Often the only positive margin |
| Teak | 500 | Faster XP, thinner GP |
| Mahogany | 1,500 | Highest fee — frequently dead |
Plank Make is 90 Magic XP per cast regardless of log. There is no Construction XP. GP is 100% the GE spread minus fee and runes — hardcoded “175 GP per oak” pages rot in a week.
Sawmill insteadNo 86 Magic: cart logs to the Varrock or Prifddinas sawmill. Slower, same fee, no astrals. Butler plank making is for Construction training, not a money maker — you pay the butler on top of the fee.
Common mistakes- Buying mahogany because a guide from 2024 said it was “highest GP/hr.”
- Forgetting the sawmill fee in the spreadsheet.
- Earth runes from the GE while an earth staff is sitting in the bank.