*
I’m working on a fieldstone chimney in the mountains built in 1912 that has crumbling lime mortar. I know using portland-cement mortar on old bricks is harmful, but is it correct to use it on granite? It is also in a seismic zone.
Discussion Forum
Discussion Forum
Up Next
Video Shorts
Featured Story
The "She Build" initiative is empowering women in Seattle, WA by ensuring they have safe, healthy homes.
Featured Video
How to Install Exterior Window TrimHighlights
"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.
Replies
*
b TVMDC
Kevin, portland should have no harmful effects on granite. But you bring up another important issue: seismic activity!
Where are you located. And are you just patching or rebuilding? Do you want to install an energy-efficient retrofit? In California, we usually demolish field-stone chimneys and rebuild them with red iron and 5/8" cdx shear wall with a retrofit firebox. The salvaged field-stones are then split and attached as veneer.
A little more info would be helpful.
*
I'm working on a fieldstone chimney in the mountains built in 1912 that has crumbling lime mortar. I know using portland-cement mortar on old bricks is harmful, but is it correct to use it on granite? It is also in a seismic zone.