The Daggers took an early lead when Jordan Maguire-Drew tapped in before the visitors had Reece Hall-Johnson sent off for a two-footed tackle.
Luke Guttridge made it 2-0 at the break when he finished well after Oliver Hawkins headed the ball into his path.
Corey Whitely completed the scoring with a powerful shot from the edge of the area.
Match ends, Dagenham and Redbridge 3, Braintree Town 0.
Second Half ends, Dagenham and Redbridge 3, Braintree Town 0.
Substitution, Dagenham and Redbridge. Paul Benson replaces Oliver Hawkins.
Substitution, Braintree Town. Lee Barnard replaces Michael Cheek.
Substitution, Dagenham and Redbridge. Fejiri Okenabirhie replaces Luke Guttridge.
Goal!  Dagenham and Redbridge 3, Braintree Town 0. Corey Whitely (Dagenham and Redbridge).
Substitution, Braintree Town. Sam Corne replaces Harry Lee.
Substitution, Dagenham and Redbridge. Scott Heard replaces Sam Ling.
Substitution, Braintree Town. Zak Jules replaces Joe Maybanks.
Second Half begins Dagenham and Redbridge 2, Braintree Town 0.
First Half ends, Dagenham and Redbridge 2, Braintree Town 0.
Goal!  Dagenham and Redbridge 2, Braintree Town 0. Luke Guttridge (Dagenham and Redbridge).
Reece Hall-Johnson (Braintree Town) is shown the red card.
Goal!  Dagenham and Redbridge 1, Braintree Town 0. Jordan Maguire-Drew (Dagenham and Redbridge).
First Half begins.
Lineups are announced and players are warming up.
Dagenham & Redbridge boosted their National League promotion hopes with a comfortable win over 10-man Braintree.