The original quote to get the windows glazed that need to be done for requirements was about $6900. To get to entire house done it was nearly $10,000.
Thats not too bad... so $3k for 13 windows and double french doors...
Yeah, we discussed it prior to signing the contract an decided that it was worth the extra $3k and then we have all of the glass external items double glazed.
Hope this helps!
Cheers!