Limestone caulk vs. mortar. Which is better?

Question

We recently had tuckpointing work done. We have exterior limestone window sills that were cracking at the joints and other places. The contractor used white/gray caulk, which is very visible. I told him I had expected him to use mortar instead of caulk, but he said caulk is more durable. Would mortar have been less visible and still relatively durable? Assuming the contractor wasn't clear about whether he'd use caulk or mortar, do I have a valid complaint?

Answer 1

Use mortar to match the look. But instead of water use a latex additive to mix the mortar. If the crack is wider than a 1/4 inch, cut up some fiber glass strands and add it to the mix

tcw

Answer 2

You can get sanded caulk that will match the color of the mortar, but will seal much better.  Check a local home center or a brick dealer to find the caulk.  Hope this helps.

Answer 3

What kind of contractor did you have doing the work?  It sounds to me that you had a painter trying to repair your masonry.  Or perhaps it was someone who normally installs windows.  In any case it sounds a bit like a "shoemaker."  "Contractor" is unfortunately a rather general term.  

A wise person will know that the craft and the tools a person normally works with is where he will tend to search first for a solution.  A mason should give you a solution that is within his trade and most probably apply a masonry solution to your problem. (possibly fine cement rubbed in with a sponge.)  

A painter or a window installer is always using caulk to cover gaps and to seal them.  They are going to also use what is familiar to them.  The more specialized the workman the more narrow the solutions that can be expected.

Conversely, if you have a general contractor you might expect his oversight to include the overall appearance and a solution you might have been more satisfied with.  

Caulking is a poor choice for masonry for reasons of appearance.  I don't even like the "masonry" caulks available. But, it can last longer and is quick and easy to apply.  (So is often required in expansion joints.)  I expect in your case quick and easy took precedence over appearance.  

What is the customary trade of your tuckpointing contractor.  It might be considered an "unworkmanlike" job.  Did you have a prior agreement to do the sills.  Was it an add on to an existing written contract.  Was it also documented?  Has he been paid?  Removing  the caulk will be a great deal of trouble. These questions point to wether you have recourse.  Sounds like a bit of a mess from here.  Good luck with it.

EDIT:  The caulk will not by itself blend in eithor in texture or color.  It will only get dirty.  You should express your dissatisfaction to your contractor.