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BBV173
Peeling paint on sap damaged chimney
BBV173

I need advice on how to fix this. One of our bedrooms has peeling layers of paint from walnut tree sap seeping onto the chimney for years. The tree is gone now but the paint comes off in little chunks everyday. At first I thought it was the plaster coming off but the more I look at it, I think it's just paint. But underneath is covered with the tree sap. Also, when I look at the seam of the chimney, I can see light! How should I fix this?
I was thinking of either putting sheetrock over it or wainscoating. I would put it over because I don't know if there is lathe between the plaster and chimney-I don't see any. If I did either of those, should I sc**** what I can? I don't think it is lead in the paint because I've checked other rooms on the floor. Or would it be possible to just repaint?

The pictures I tried to add don't work so here are links.

https://www.dropbox.com/s/9w634992dj3wev5/File%20Jun%2019%2C%208%2058%2016%20AM.jpeg?dl=0

https://www.dropbox.com/s/i5797aktt83pjcy/File%20Jun%2019%2C%208%2057%2050%20AM.jpeg?dl=0

ed21
Re: Peeling paint on sap damaged chimney
ed21

The first photo looks like like moisture is getting behind the siding. That will cause the paint to peal. Good prep and painting needs to be done. Also the joint treated to keep the water out. The proper caulk could help, but also sealing the edge of the siding would keep moisture from migrating from the chimney.
The second photo could be a similar issue with moisture coming through the chimney. Or from condensation from cold masonry in the warm, humid house. Sealing the crack and furring and dry wall with insulation should fix it.
Also the crack is letting out warm, moist air that condenses as it travels out the wall that also may be contributing to the exterior paint pealing problem.

Benjamin
Re: Peeling paint on sap damaged chimney
Benjamin

Ok that is not sap. What is being vented into that chimney and is there any sort of liner in it? My guess would be that you have a furnace venting into an old unlined chimney and you are getting condensation of the exhaust gasses in the flue. That water then wicks out and carries dirt with it. it could also be from faulty flashing or mortar above the roof line. But i can all but guarantee that it has nothing to do with sap

ordjen
Re: Peeling paint on sap damaged chimney
ordjen

Absolutely agree with holler2!

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