Renewal tends to be expensive, and can't get any windows that others can't.
GSG does Andersen and Harvey.
Your casement cranking mechanisms could probably be replaced by you.
They are not that hard, and general fail due to dirt/gunk in the track that the arm rides own that is attached to the sash.
Homeowners tend to use something like WD40 to lubricate when they should be using a spray silicone. The WD40 causes the dirt to bind and gunk up.
The north and west are building humidity... common window condition... and over time they let the wood swell and rot. Andersen windows are warrantied only to a point. They are not lifetime like many on the internet state.
The 100 Series Fibrex composite doesn't do a double hung. You could also replace these yourself... several island owners in the area of done so with just a little consultation with us. But GSG would also do them.
The other option depending on colors/etc are vinyl.
It is important to know if you intend to do actual replacement (insert units) or new construction (the entire old window is removed including the wooden frame)... so that they can be quoted correctly.
Inserts are measured from the interior and the unit is made 1/4 inch smaller in each dimension. We are currently doing the New Hampton School with Paradigm inserts. They come quickly, so we suggested one based on our measurements and then adjustment for the other to keep the fit tight, but not overly tight.
Fiberglass or vinyl are the best options to avoid that 'rot' over time... also less issues with hardware as no wood to swell from humid conditions. The fiberglass manufactures generally have a two year warranty on hardware and twenty year warranty on glass with a ten year warranty on paint (this is for manufacturing defects and chipping/fading - it doesn't cover damage done on site). The better vinyl will have either the same warranty, or in some cases longer warranties for initial buyers (when you transfer your home the warranty for that buyer is back to that 2/10/20).
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