If I read your post correctly... it sounds like you "mentioned" to
your contractor that you wanted Jeld-Wen when you were originally
"negotiating" the contract, and he told you they prefer to install LBL.
In other words neither Jen-Wen nor Milgard were documented anywhere in
Did you at least list R-Values and window function similar to the
Jeld-Wen in the contract?
Without specifying the exact manufacturer in the contract you have no
recourse. If LBL was listed in the contract then hire a lawyer. If your
contract didn't specify things like vinyl versus aluminum, or they
must have argon gas, or listed a minimum R-value etc., then you more or
less left the entire decision on window selection to your contractor.
If this is the case, I'm afraid you have little recourse. Rule of
thumb, (for future reference) if a contractor cannot install or build
something specific to your request... then find a different contractor!
I had a customer who insisted I install Pella windows. The customer
even specified the series and model number. The windows were very
expensive and would increase the total job estimate/cost ("and"
would reduce my profit margin on the job!) It's easier for me to add
my markup on a less expensive window. That said, I would have at least
made sure the insulation qualities on my choice would be similar to the
Pellas. In the end, I installed the Pellas because the customer refused
to budge. In all honesty I could have installed a different window with
the similar specifications and insulation properties for less money to
them (and put more money in my pocket)... but they knew what they
wanted. If I didn't make the arrangements to install the Pellas they
would have found another contractor who would.
Next time... Two Rules:
1) "Never forget who's holding the checkbook"
2) "Get it in writing"