Do I have to acknowledge addenda in my bid?

Usually yes. Most bid forms ask you to list every addendum received. Missing one can get a bid thrown out, and pricing old drawings can cost you on the job.

What is the difference between an addendum and a change order?

An addendum changes the documents before the bid or contract. A change order changes the scope, price or schedule after the contract is signed.

What is an addendum and what is a revision cloud?

An addendum is a formal change to the bid documents issued before bids are due, and it becomes part of the contract. A revision cloud is the scalloped outline drawn around whatever changed on a sheet, usually tagged with a delta triangle and revision number, so bidders can find the change fast.

Worked example

Addendum 2 reissues a floor plan sheet with one wall moved.

1.Find the revision cloud and delta tag on the reissued sheet
2.Re-measure only what is inside the cloud
3.Update the affected quantities and note the addendum number on your bid

Your bid reflects the addendum without redoing the whole takeoff.

Measure it in MetreMate

Upload the reissued sheet and measure the clouded area on its own layer, so the original takeoff and the addendum changes stay separate.

See the Layers Manager feature

Related terms

Frequently asked questions

Back to the construction takeoff glossary

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