Dublin claimed their first points of this season's Allianz Football League campaign on an emotional evening for the hosts at Croke Park.
Paying tribute beforehand to the late Shane O'Hanlon - the Dublin backroom team member passed away last weekend in Spain - Dessie Farrell's crew led virtually from pillar to post.
Con O'Callaghan, curiously wearing number nine but stationed close to Roscommon's goal at full-forward for the evening, was team captain in James McCarthy's absence and led the line superbly with 0-07.
It was a strong bounceback from Dublin following back-to-back defeats to Monaghan and Mayo and they will hope to keep up the winning habit when they play Kerry back at Croke Park in a week.
Roscommon trailed by just a point at half-time but struggled to cope with Dublin's dynamism after the break and registered a late consolation goal from Enda Smith.
They are still searching for their first win of the campaign and will hope that arrives next weekend at home to Monaghan.
For Dublin, the positives were many; O'Callaghan's strong showing as an inside forward gave them real bite in attack, Sean Bugler impressed throughout while the likes of Lee Gannon, Brian Fenton and Ciaran Kilkenny contributed significantly to the win too.
Substitute Niall Scully scored Dublin's only goal in the 55th minute with the brilliant Bugler setting that score up for him.
Dublin initially named an unchanged team from the side that lost by a point in Castlebar though John Small, Eoin Murchan and Peadar O Cofaigh Byrne were late additions.
Greg McEneaney, Jack McCaffrey and Colm Basquel made way while Brian Howard, Liam Smith and Cian O'Connor were added to the list of substitutes.
James Fitzpatrick, fresh off a strong Sigerson Cup run with Maynooth University, came into the published Roscommon lineup for Cian Connolly.
In all, it amounted to five changes to the Roscommon team from the lineout against Galway in Round 2.
Brian Stack, Conor Hussey, Evan Flynn, Shane Cunnane and Fitzpatrick replaced Niall Daly, Robbie Dolan, Donie Smith, Ben O'Carroll and Connolly.
A number of matchups immediately caught the eye; O'Callaghan and Roscommon full-back Stack, Enda Smith and O Cofaigh Byrne at midfield and the Daire Cregg-Murchan battle in front of Hill 16.
Cregg had a stormer midweek in the Sigerson Cup final for UCD, scoring nine points in the defeat to Ulster University, and hit the ground running here.
He plagued Dublin's defence, scoring two first-half points and going so close to grabbing a 17th minute goal. Murtagh set him free with a hand-pass over the top, allowing Cregg to get in behind Seán MacMahon along the right endline. Cregg's hand-pass for a point appeared to glance off MacMahon's outstretched fingertips before looping into the net though referee Sean Hurson gave a free out for a hand-passed goal.
Dublin edged the first quarter by 0-05 to 0-03 with O'Callaghan causing real bother for Stack and pinching two points. The Cuala man then won a free that goalkeeper David O'Hanlon converted and with 20 minutes on the clock Dublin held a double scorers 0-06 to 0-03 lead.
Roscommon were better in the second quarter and Smith twice shook off O Cofaigh Byrne for points while Cregg and Murtagh sniped a couple too.
Dublin, who struck seven first-half wides, led marginally at the interval, 0-08 to 0-07, thanks to Brian Fenton's long-range stoppage time score but it remained anyone's game.
Dublin had lost a bloodied Cormac Costello by that stage after being on the receiving end of a flailing arm to the face from colleague Lee Gannon.
Sean Lowry replaced Costello though was himself replaced in the third quarter by Lorcan O'Dell whose first act was to play in Ross McGarry for a 51st minute score.
Dublin were already pulling away from Roscommon at that stage following points from O'Callaghan and Bugler and the Scully goal left seven points between them, 1-13 to 0-09.
Bugler did well in the buildup to the goal, playing a neat one-two before laying off to Fenton who fed Scully for a routine close range finish.
O'Callaghan added three more points in the closing 20 minutes or so, one from a free that he won himself and another from an advanced mark as he displayed his full range of skills.
Dublin: David O'Hanlon (0-01, 0-01f); Theo Clancy, Eoin Murchan, Sean MacMahon; Lee Gannon (0-01), John Small (0-01), Cian Murphy; Brian Fenton (0-02), Peadar O Cofaigh Byrne; Ross McGarry (0-03), Sean Bugler (0-01), Ciaran Kilkenny (0-02); Cormac Costello, Con O'Callaghan (0-07, 0-01f, 0-01m), Paddy Small.
Subs: Sean Lowry for Costello (8-f/t, blood), Niall Scully (1-00) for Costello 47, Lorcan O'Dell (0-01) for Paddy Small 50, Greg McEneaney for John Small 55, Brian Howard for O Cofaigh Byrne 62, Killian McGinnis for McGarry 71.
Roscommon: Conor Carroll; David Murray, Brian Stack, Niall Higgins; Conor Hussey, Evan Flynn, Eoin McCormack; Shane Cunnane, Ruaidhri Fallon (0-01); Daire Cregg (0-04, 0-01m, 0-01f), Dylan Ruane, Enda Smith (1-02); James Fitzpatrick (0-01), Diarmuid Murtagh (0-03), Ciaran Lennon.
Subs: Cathal Heneghan for Fitzpatrick 50, Robbie Dolan for Hussey 50, Conor Cox (0-01) for Lennon 55, Adam McDermott for Ruane 62, Luke Glennon for Higgins 67.
Referee: Sean Hurson (Tyrone).
