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Question DetailsAsked on 6/9/2016

how much should it cost to apply tar sealant to wood chimney

I have a wood exterior with metal interior chimney. Roofer wanted to charge $350 just to apply some Firestone rubber hydro sealant to the exterior. Feeling taken with this price!! Two story home with steep room.

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2 Answers


That price doesn't seem too high, especially if he has to use fall protection measures to work safely on your steep roof. Get a couple other quotes if you think the price is out of line. No need to feel taken because you are free to hire another contractor. Another contractor may provide a better recommendation anyway as tar is rarely a long term fix.

Answered 4 years ago by Jim Brewer


Price sounds fair or more than fair for the type of material (though I can't find that product in the Firestone catalog) - but that is definitely NOT the right thing to use on a wood exterior, if you meant covering the entire thing - that will lock in moisture and promote rapid rot, and likely start bubbling and peeling off in short order.

If you meant just sealing the interface between roof and flashing or at the flashing and the chimney race or maybe coating the flashing to stop rust through, then Firestone Lap sealant or other butyl mastic sealer should work well - and a Handyman or Chimney Sweep should be able to do this for about $100 or so. Though as other comment said - if a steep roof such that is is not accessible reasonably with a ladder, but requires rapelling gear - then the price sounds in range and the roofer is your better choice as far as professionalism of the sealing job goes.

Roofer might have a minimum charge and that is why it sounds so high - $250-350 is a common range for that, so you pay that whether replacing one loose nail or doing an hours work.

Answered 4 years ago by LCD

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