This isn’t the first time I’ve cracked my head against this particular wall.
I have no problem with providing supplementary information where the details are sketchy, or clarification where there is ambiguity in the wording, but that’s where I draw the line.
I get seriously irate when I have to deal with imbeciles who think that I am fooled by their shrill demands for supposedly “missing” information that through some mysterious quirk of the printing process, only becomes visible in their document after I point it out to them.
If the contractor can’t be arsed to read the specification, I’m certainly not going to read it to him.