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Question DetailsAsked on 8/2/2013

cost to replace main stack

Need to replace the galvanized main stack. What is the average cost to replace it and what is the time frame?

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Assuming you mean double-walled galvanized furnace or furnace and hot water heater stack, can run about $500-1200 for a typical 2-story house.

If you mean just running a liner to downsize it because the furnace has been replaced and now vents directly outside so only the hot water heater is using the stack, then more like $250.

Will take a 2 man crew roughly 1/2 day - though if everything goes well and no nails have been driven through the stack during construction and it has not been sealed in place or insulated in the attic, can sometimes be done in 2 hours.

Answered 6 years ago by LCD




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