Same manufacturer, two materials, one decision. What the vinyl 250 Series and the fiberglass Impervia actually differ on, including a warranty difference most buyers never notice.

A complete window quote names the series, the glass, the installation method and who handles rot, trim, flashing, permits and disposal. Here is the full line-item checklist, plus the cancellation right most homeowners never hear about.

Two quotes for the same house, $8,500 apart, and both can be honest. Here is what actually creates the spread, variable by variable, with a worked example.

Fibrex composite against vinyl, at a similar price point. The differences that actually decide it: double-hung availability, dark colors, and what happens to the warranty when you sell.

Andersen’s 100 Series is Fibrex composite, not vinyl and not fiberglass. What that means for colors, warranty and price position, and who should look at something else.

Full-frame replacement adds about $600–$1,000 per window over an insert. Here is what each method actually does, what you give up, and how to tell which one your house needs.

Three window quotes, thousands apart, and none of them comparable. Here is how to normalize them: cost per opening, the eight specs that must match, and what is usually missing.

Fiberglass costs two to three times more than vinyl and lasts longer. On a 15-window house that is a $9,000 decision. Here is when each one is the right call.