The more detail the better.
The majority of contract disputes occur do to a different perception from one party to the other.
This can be avoided if the contractor takes the time to spell out every single item and every step of the way.
Pre-Job estimate analysis photos.
How the tear off will be done.
Dumpster Pan or dump truck.
Subcontract the job out or employees.
Tarping the torn off sectionm every night.
What quality of felt paper, 15# or 30# or synthetic.
Gutter Apron Drip Edge Flashing.
Gable edge Overhanging Drip Edge Flashing.
Replacing or re-using existing pipe vent flashings.
Installation procedure for counter flashings.
Brand of Ice and Water Shield underlayment.
Treatment procedure for any valley details.
Treatment procedure for any roof to wall tie ins.
Brand and style by name and color of the shingles
Added Intake Ventilation to Balance the New Exhaust
Brand of Premier Ridge Vent, not any rolled vent, ick.
How many nails per shingle.
Job Progress detail photos for every step done.
Customer satisfaction progress reports in writing
End of Job Punch List Walk Through before payment
Fully detailed written warranty
I have a collection of 135 other competitors old roofing proposals people give me and I feel they pretty much are all a disgrace, with a few very noticeable exceptions.
My own proposal is usually 8 pages of analysis and step by step details for the proper solution and I sit down with every home owner for as long as it takes. I also provide all of the manufacturers brochures which back up and properly authenticate all of my conclusions.
Most roofs only last for about 12-15 years, but if they were done correctly in the first place, paying attention to ALL of the proper details, their life would be as stated and be fully warrantable.