hey, tracey! :--)
this is actually an *involuntary* behavior, it is a physical reaction triggered by the dogs emotions... so while it can be addressed behaviorally, the likelihood of these men (who are there to do the job) being aware of their own body-lingo + movements as TRIGGERS for the dog to leak, is pretty darned low, IMO.
it is not that they do not care - it takes a LOT of awareness to monitor ones own body-parl to avoid upsetting somebody else, we move in ways that are habitual.
i would suggest an alternative -
buy at least Two cotton belly-bands sized to fit the dog, and move him entirely out of the kitchen area (or wherever else they may need to work). the belly band is to be LINED with inexpensive, UNscented self-stick menstrual pads - no perfumes, etc, just plain. (perfumes, deodorants, etc, can cause a dogs skin to break-out or irritate tender areas.)
at least 2 or 3 times a day, when U take him out to potty, slip off the belly band + check to see that it is DRY. change the pad lining if it is wet, and change it at least once every 24 to 48 hours, even if it is DRY - to prevent bacteria accumulating.
this way, he can go anywhere in the house without fear of leakage, and if he does, the pad catches the urine... no big deal. since nobody can TELL that he is leaking / did leak, he will also not get any involuntary angry or irritated feedback, not even body-language or sighs, etc, for leaking...
it becomes a non-event.
since it becomes an entirely un-remarked event, the emotional turmoil associated with it tends to calm, and this will help him to stop leaking altogether, over time.
i would start getting him accustomed to the belly-band soon, in his familiar place - the kitchen... then move him into the living-room with the family, within a few days to a week. by the time the destruction starts (pulling the old heating system out), he should be comfortable in the new area.
if need be, to get him far-enuf away from the noise + strangers, put him in the bedroom with the door shut And A Note explaining *not* to let the dog out, please - and not to enter!
a radio tuned to all-music can help make the sounds of ripping out chunks of wall and conduit (light classical, something happy - NOT talk-radio or loud strident haranguing, happy and calming);
if there are no all-music stations, THRU A DOGS EAR is a CD just for dogs, of music designed for their enjoyment; it comes with the book of the same name!
there is also the old reliable, white-noise... tune to the static between stations on a low volume, as a masking noise.
i would think these would get him off on the right paw...
and the co-operation of the construction crew becomes un-necessary,
cheers,
--- terry