Botched window installation job?
I recently had 10 Marvin wood replacement (insert) windows installed in my old Victorian to replace some badly weathered double-hungs. The windows seem to be high quality, but I'm disappointed with the installation job. They must not have taken very accurate measurements, because the windows are all significantly smaller than the opening. Typically there is a 5/16"-7/16" gap on both sides of the window, and a gap of 1/4"-2/3" on top -- so I have lost a good amount of glass and incoming light.
The installer insisted that this wasn't a problem. But he didn't seem to know what he was doing, and just wanted to complete the job as quickly as possible. He was about to cut into my windowsills and put the entire replacement window deeper into the house, rather than cutting off the exterior stop. Luckily, I caught him and talked him out of that.
They put in a bead of expanding foam to fill the gap around the window on the interior, but there is a big vacant slot surrounding the window on the exterior, which has not been filled. I'm not sure what should be done there, but it clearly should be filled with something... A few of the windows are a bit tilted, by about 1/32" per vertical foot.
On the interior, I can't re-use my original 1/2" trim, because it isn't wide enough to cover the foamed gap and go up to the groove on the insert's frame. My trim would have worked fine if the window was sized correctly for the opening. Now, I'll need to make new trim, at least 15/16" wide.
I'm usually DIY for my home projects, but hired this out because I thought that a professional would be able to do a better job with fitting, installation etc. So this has been very disappointing...
What do you think of this situation? What is the appropriate size of the surrounding gap? I'm hoping to collect some opinions/advice before I make a complaint. To re-replace all of those windows would be a major pain, since I'd have to prime and paint them all myself (weeks of frustrating work). Would I be justified in asking for a refund of the installation costs? This was a $12,000 job, covering both materials and labor.