Scope (Note cat, class, affected areas, what was demo'd and justification for demo)
I know you are asking for info to invoice, but in this world, this is all part of the invoicing.
Work Auth
Affected Photos (showing damaged areas before anything is done)
Completed Photos (showing all work completed to point of equipment)
Equipment Photos (show ever single piece installed)
Dry Logs (This is where most people lose the battle)
Your dry logs need to show the drying progress from start to finish.
Every affected material has an initial reading, and each day it should decrease towards the dry standard reading you've procured out of that structure.
You should be taking air readings. RH/T/GPP, for; Outside air, Unaffected area, Each drying chamber, each dehu output (to get GDEP).
Your chambers should be at or below 40Rh within 24 hrs. Unattained you'll get pushback (and something is wrong with your drying plan).
You should maintain at least 4-5 GDEP to maintain justification of dehumidification.
You also need to justify your equipment.
You can't justify an XXL Dehu (160PPD or >) on a Class 1 loss that only needed 24PPD.
You can't justify 16 airmovers on that same loss that calcs would rec 6-8 for.
This is either going to be hard math you should provide by the
IICRC calcs, or use a drying app such as MICA.
Most class 1 are dry in 2-3 days. If its going to 5 or longer, expect pushback without serious justification. Most class 2 are 2-4 days. Most class 3 are 3-5 days. Prepare to justify most times you go over 5.
Certificate of completion/satisfaction (signed by insured)
Xactimate is the standard. Either price by it or expect pushback in the majority of cases.
If you are planning on doing more than a handful of water losses annually - get and learn Xactimate. Anyone can be proficient inside a few days armed with their entry book/coursework and a few example estimates donated by someone to you.
Steer clear of Symbility - it's 20-35% under Xact pricing.