Should Chimney Flashing Be Replaced When You Reroof?

Read the flashing line item closely

A reroof opens the joint between the roof covering and chimney. Ask which pieces of metal are coming out, which may stay, and how new roofing will connect to them. A line that says ‘flash chimney’ leaves questions about the uphill side, step flashing along the sides and counterflashing at the masonry.

Ask what the roofer can see before tear-off

The exposed metal, mortar and nearby shingles can show clues, but the condition beneath the flashing may only become clear when it is removed. Ask how the crew will document and price wood or masonry work if damage extends beyond the original scope.

Coordinate masonry work with the reroof

If deteriorated mortar, a failing crown or an unused chimney is part of the conversation, decide the chimney scope before new shingles are installed around it. Have the appropriate trade confirm whether a flue still serves an appliance or fireplace before discussing removal. Ask who takes responsibility for weatherproofing between visits.

Make the final handoff inspectable

Request photos of the joint before it is covered and a written description of how the flashing and water barrier were integrated. If one contractor handles the masonry and another handles the roof, confirm who addresses a later leak at the junction.