Milne claimed six wickets and Riordan four as they dismissed minor premiers Albion for 120 in reply to their 143.

"I'm dead proud of my boys," Milne said.

"It's one of those things. Last year, and at the start of this year no-one gave us a chance."

After knocking off Court House in the preliminary final the previous week, Kookaburras went into the decider confident and quickly built momentum through Riordan (35) and Paddy Paul (45), the openers putting on 67 for the first wicket.

But they weren't really able to capitalise on the strong start as James Mack (5-28) tore through them.

"I thought we were probably 50 short," Milne said.

"(But) I knew 143 would be hard with our bowling attack. We bowl stump to stump."

Albion openers Brad Cady (24) and Zach Martin (24) though made a good dent in the run chase on Saturday to have them in a strong position at 2-49 overnight.

Play was delayed for two-and-a-half hours on Sunday, and Albion were quickly wishing it didn't go ahead as Milne and Riordan ripped their title hopes apart.

At one stage they lost 5-11 and looked like they might not even make it to drinks.

But skipper Brad Jenkinson batted superbly and with Luke Ryan providing dogged support, almost dragged Albion out of the mire.

They toiled for over an hour before Jenkinson on 39 off 99, skied one to Paul, sparking jubilant celebrations among the Kookaburras players and supporters.

First grade's win completed a rare and special double after the second grade grand final was washed out.

As minor premiers Kookaburras were crowned champions.