East” damaged Cae Gof clubhouse facilities.
A seventh league win from 11 starts lifted them into eighth spot with the goals all coming in the first half from ex-Bont boys.
Rob Symons opened the scoring; dancing Danny Woolfenden struck twice while Grange retaliated to complete the scoring.
In Division One, Cornelly Utd gained a second consecutive 5-3 away win to move up into fifth place in the table. Having flown to a 5-3 victory at Cardiff Airport during the festive season, the Wasps led 4-1 midway through the second half at Aber Valley.
But Aber going down to 10 men proved a game changer, and they bucked the trend in reducing arrears to 4-3 before Cornelly came again late to complete another amazing 5-3 scoreline.
Jason James contributed a goal hat-trick, moving him on to 13 goals for the campaign, while 24-goal hitman Ryan Penny-Hughes and Arran Jefferies also found the back of the net.
Leaders Porthcawl Town maintained an unbeaten tag with a comfortable 5-0 success over Clwb Cymric in the capital city.
The highlight was a mature performance from 17-year-old debutant Sam Phillips, and a wonder strike from Joseph Jones.
Pintsize attacker Morgan Thomas netted twice with the remainder credited to Ieuan Thomas and top scorer Jorge Crofts.
But Llangynwyd Rangers suffered an 11-0 loss at promotion-seeking Blaenrhondda while Division Two promotion hopefuls Vale Utd dropped more points – this time at AFC Wattstown.
Last time out the boys from leafy Corntown were held to a 1-1 draw at Llangeinor, and last Saturday in the Rhondda Valley they led for a longtime on the back of a Reece Hicks strike.
Though powerful Wattstown levelled with 10 minutes to go through Leon Anstee, Vale remain in third place.
And Llangeinor stretched an unbeaten league run to five matches with a 4-2 victory at Cwmbach Royal Stars.
Rhys Jones contributed two goals with single strikes going against the name of key striker Simon Lock and Rhys Thomas.
But in Nathaniel Cars Welsh League Division Three, Caerau lost 8-0 to classy Penrhiwceiber Rangers at the Glassbrook.
Rob Davies became the third Caerau manager of the season – following Adrian Shearan and Simon Livick at the Riverboat helm – and the race is now on to gel a much changed young team containing a clutch of newcomers.
Llantwit Major sat out last weekend’s programme, and they resume league action on Saturday away to Cwmbran Celtic.
When the sides met at Windmill Lane back in September, Celtic won the day, 1-0, with Chris Ham getting a tasty winner.