I am confusted (but that's not hard). He made a 2" cut? How deep is
the stonework and concrete? Did he cut through to the bottom of the
concrete? On 16', how many cuts did he make?

I am probably wrong, but I thought an expansion joint had to go all the
way through the concrete to allow room for expansion. Otherwise you
are allowing room for the top to expand, but not the bottom.

Okay, I'll be quiet and let someone more knowledgable than me answer.

wrote:
Had a fieldstone walkway put in recently, roughly 16' long. It sits
on 2" crushed gravel, then concrete, then mortar. Mason used type S
mortar for higher strength. The jobsite is in the northeast (upstate
NY).

The mason cut expansion joints in there using a concrete saw. There is
roughly a 1/4" gap that has a depth about 2". I have masked and
caulked the gap with GE's silicone masonry grey-tinted caulk and it
looks good. However, I caulked the top and sides of the cut with the
thought being that should water get inside under the caulk joint and
expand, it woudl negate the effects of the caulk on top. SO basically
right now the entire cut is sealed from the elements from all three
sides. I am wondering if this was a bad idea. in the unlikely event
the concrete foundation shoudl crack and water should get inside the
small space, there is no way for the water to get out. Worst case
scenario, this happens during winter and the water freezes and cracks
the walkway. The last thing i want is for my nice new walkway looking
like crap after one winter.

I had considered this while I was caulking, however since the cut was
made by hand with a power saw, the depth varies and woudl not provide
guaranteed adequate drainage anyway. In other words, it could still be
possible that water could become trapped in the gap even without
caulking the sides.

I forgot to mention, a high quality stone sealant has alreadt been
applied over the entire walkway surface.

This was my first experience caulking a stone sidewalk so i wanted to
ask the gurus here if this was the best way to prepare this walkway for
the winters here in upstate NY.

Thanks,