Tried a new lime mix on a chimney rebuild and the difference was huge

I was repointing an old chimney in Cincinnati and swapped my usual type N for a type O mix. The type O was way softer and more forgiving on the hundred-year-old bricks, didn't force any cracks. Anyone else use a different mortar spec for historic work?

2 comments

2 Comments

bennett.noah3d ago

Interesting, I've actually had type O fail early on softer bricks. What was your mix ratio?

thomas3463d ago

It's funny how the "right" mix can still go wrong depending on the material. I see that a lot with other stuff too, like how a perfect paint won't stick to a certain wall.