I'm in the process of rehabbing a 1925 rowhome in Baltimore City. A
large block of solid marble was used for the front door threshhold.
It is around 5 feet long, 4 inches thick, and 8 inches wide.
The problem I have run into is that the door frame is not securely
fastened to the marble. This allows the bottom of the frame to slide
around on top of the marble.
What is the best way to fasten a door frame to marble? Obviously I am
very worried about cracking or damaging the marble, and I also do not
want to use a repair technique that will detract from the appearance
of the entryway.
The best technique I have come up with is drilling straight down into
the marble and dropping in a bolt through the wood around the frame
and into the marble. this bolt would be just large enough to fit snug
in the hole without putting pressure on the marble. Trim would be
placed on top of the bolt.
Any ideas or suggestions would be greatly appreciated. Or if you
think the idea that I had is good, how does one go about drilling into
marble? How can I be sure that I don't crack it?
Thanks so much in advance for any suggestions or insight you can
-R. Neil Covington
PS -- A picture of part of the threshold is at
Unfortunately a previous owner painted the marble, which is another
issue I will have to resolve.