Jump to content
Sign in to follow this  
Mike Lamb

20-year-old building – Spalling limestone

Recommended Posts

Would sealing the exterior of the limestone blocks slow deterioration? Or would block replacement be the best remedy?

IMG_4167.JPG

IMG_4170.JPG

IMG_4168.JPG

Share this post


Link to post
Share on other sites

I'm curious about the efflorescence.  Why does it seem to favor the border between the spalled and un-damaged areas?

Share this post


Link to post
Share on other sites

If a lime mortar would have been used, the moisture in the wall would migrate out through the joints.  Portland based mortar is forcing the moisture through the face of the stones. 

Sealing on the exterior would be useless.  When the faces of the stones erode back about 1/2", they can be patched with Lithomex, which is lime-based.

  • Like 1

Share this post


Link to post
Share on other sites
10 hours ago, Marc said:

I'm curious about the efflorescence.  Why does it seem to favor the border between the spalled and un-damaged areas?

Just a guess, but I suspect that the worst of it occurs where the most water emerges. You can't see it because it's fallen off along with the face of the stone. 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...