So you verbally said ok to the picture of the window that clearly hasn’t got a massive black border around it. All you were saying ok to was the size of the clear part of the window then surely? They can’t black most of it out later. When I signed off windows I had to write my name in blood pretty much.
"Ah, well maaaaaate, tha' wunts an 'ilti guuun ter fix they bolts ter 't steels lahk "
It was another of those 'If I were you, I'd ' conversations. And I'm sick of them. Sick, sick, sick up to here I tell ya.
Except today: oh delicious today, today's the day this Teddy Bear had a brief picnic.
"Oh really, that's interesting: fancy a trip up the ladder to have a look at these then ?"
At first they don't look much, until you drill one in a steel beam in less than 20 seconds with a Bosch impact , and bingo.....
Well, give the old codger his due, he wheezed up the steps and inspected the self-drilling facade screws
" Would sir care to drill another one in for me? It'll take sir less than 20 seconds ?
" Nahhh, yer awreyet : bet that cost a bob-or-two." said Mr By Now Shame Face.
" Bob or two yes, erm... Minus the cost of hiring a Hilti and the special bolts they spit.....
Didn't tell him that they work better if you spit on the end of the screw.
"Mind you don't fall off the ladder, (you miserable git) I muttered under my breath.
Did you sign the drawings? If so, just try to negotiate. If not, claim that they should have worked to the structural opening sizes supplied by you and that you considered that the drawings they sent were only indicative of a standard detail and were not being relied upon for finished window sizes.