What to look for
- Clear product details: brand, series, frame material and glass
- Liability insurance
- Their own trained installers, or clear info on subcontractors
- An installation warranty, not just the window maker's
- Reviews that mention clean installs and no leaks
Questions to ask before you hire
- Is this a retrofit or full-frame replacement?
- Who will install the windows?
- What does the installation warranty cover, and for how long?
- Is removal and disposal of old windows included?
- How will you handle rotted frames you find during install?
Getting and comparing quotes
Make sure every quote is for the same number, sizes and specs. Window prices vary a lot by brand and glass, so a cheaper quote may simply be a lower-grade window. Ask what happens if they find rot after removing the old windows.
Red flags
- A 'today only' price that disappears if you wait
- Won't name the window brand or series
- Vague about who installs
- Asks for full payment before installation