Bid exclusions and clarifications: how to write a proposal that protects you
Two bids for the same scope can be thousands of dollars apart because one includes something the other leaves out. Your proposal's inclusions, exclusions and clarifications are what make your number mean something. Written well, they win jobs and prevent change-order fights later.
- State what's included as clearly as what's excluded.
- Tie every clarification to a drawing, spec section or addendum.
- Keep exclusions specific; a long list of vague exclusions makes your bid hard to level and can cost you the job.
The four parts of a scope letter
- Basis of bid: drawing set and date, spec sections, addenda received (by number).
- Inclusions: the scope you're carrying, in plain language.
- Exclusions: specific items you are not carrying.
- Clarifications and assumptions: how you interpreted unclear items, and conditions your price depends on.
Good exclusions are specific
"Excludes anything not specifically listed" helps no one. Compare:
- Vague: "Excludes blocking." Better: "Excludes wood blocking for casework and toilet accessories; includes 20 ga. metal backing at locations shown on A-501."
- Vague: "Excludes fire caulking." Better: "Excludes firestopping at penetrations by other trades; includes head-of-wall joint system per detail 7/A-601."
- Vague: "Excludes overtime." Better: "Based on a 40-hour week, day shift; overtime or shift work at the rates attached."
Common clarifications for drywall and ceiling contractors
- Finish levels by area (see drywall finish levels 0-5).
- Who provides lifts, hoisting, dumpsters and temporary power (see estimating general conditions).
- Fire-rated assemblies carried, by UL design number (see estimating fire-rated assemblies).
- Number of mobilizations and assumed sequence.
- Ceiling grid and tile by manufacturer and product, with seismic requirements if any.
- Price validity (for example, 30 days) and material escalation language.
Why it matters on bid day
GCs level bids against a scope sheet. If your exclusions are clear, the GC can add a known number for the excluded item and still see you as low. If they're vague, the GC may assume the worst. Our bid leveling guide shows the process from the GC's side.
After award
Make sure your proposal, with its exclusions, is attached to or referenced in the subcontract. If it isn't, ask for it to be added before you sign. Then use it as the baseline for every change order.
Published October 27, 2026. We do not use affiliate links on this page; see our Affiliate Disclosure.