5 Questions to Ask Before Hiring a Window Installation Company

Window installation is a major investment, and once you begin reaching out to companies, the pressure to choose the right one can feel very real. With so many companies making similar promises, it’s natural to wonder who you can truly rely on.

At Goverla Windows & Doors, we’ve spent over 20 years installing windows for homeowners across the Fox River Grove and Barrington, IL areas. Transparency is something we take seriously, and that starts with asking the right questions from the very beginning.

Here are the five questions every homeowner should ask a potential window installation company:

• What are your credentials (licenses, insurance, and experience)?
• What warranties and service terms do you offer?
• What does your installation process look like?
• Can you provide references or show past work?
• How do you determine your estimate?

By asking these questions up front, you’ll be able to spot a trustworthy company and avoid the costly mistakes that come with a poorly vetted hire.

What Happens If You Hire the Wrong Window Installation Company?

Choosing the wrong window installer can have lasting consequences for your home. Poor installation often leads to:

• Drafts and air leaks that raise your energy bills
• Water damage or mold from improperly sealed windows
• Windows that stick, fog, or fail to lock correctly
• Voided product warranties due to faulty workmanship
• Financial liability if the contractor lacks proper insurance

These aren’t minor inconveniences. They’re the kinds of problems that compound over time and cost far more to fix than the original installation.

What Questions Should You Ask a Window Installation Company?

What Kind of Licenses, Insurance, and Experience Should I Look For?

Verifying a window installation company’s credentials is the first and most important step in protecting your investment. Here’s what to look for:

• Licensing: Proper licensing confirms the contractor meets your state and local standards.
• Insurance: Liability and workers’ compensation coverage protect you from financial risk if an accident occurs on your property.
• Experience: A proven track record of completed installations is one of the strongest indicators of quality workmanship.

What Warranties and Service Terms Can I Count On?

A company that stands behind its work will have no problem providing clear, written warranty information. Ask about:

• Manufacturer warranties covering the windows themselves
• Labor warranties covering the quality of the installation
• Service terms detailing what happens if something goes wrong after the job is done

Never accept verbal promises. Get everything in writing before work begins.

What Does the Installation Process Actually Look Like?

A trustworthy company will be able to explain its window installation process from start to finish. They should walk you through each step, which typically includes:

• Pre-installation prep and clear communication about timing
• Careful removal of old windows with no damage to your floors or walls
• Precise fitting, leveling, insulation, and sealing of new windows
• A thorough cleanup once the work is complete
• A final walkthrough where you inspect the finished product

If a company can’t walk you through their process step by step, that’s worth paying attention to.

Can I See References or Examples of Past Work?

Past performance is the best predictor of future results. Ask for:

• A portfolio of completed local projects
• Recent references you can contact directly
• Online reviews from verified customers

Companies proud of their work are typically happy to share it.

How Do You Determine Your Estimate?

A reliable estimate should be detailed, written, and based on an in-person assessment of your home. A trustworthy window contractor should be willing to break down the costs for materials, labor, and any additional services so you know exactly what you’re paying for.

What Red Flags Should You Watch for Before Signing a Window Installation Contract?

Even if a company answers your questions well, it’s still important to watch for warning signs before signing a contract.

Be on the lookout for:

• High-pressure sales tactics: Reputable companies will give you time to consider your options without forcing you to sign on the spot.
• Large upfront payments: A reasonable deposit is standard, but demanding a large portion or the full amount in cash before work begins is a major red flag.
• Vague or incomplete contracts: Your contract should clearly outline the scope of work, materials, timeline, and total cost. Avoid signing anything that feels ambiguous.
• Bids that are too good to be true: An unusually low bid might signal subpar materials, inexperienced labor, or hidden costs that will appear later.

Ready to Hire the Right Window Installation Team?

Asking the right questions gives you a solid framework for vetting any window installation company. Use them, and you’ll be far better positioned to choose a team you can trust with your home.

At Goverla Windows & Doors, we welcome every one of these questions because we have real answers to back them up. Reach out today for a free in-home estimate and see firsthand what quality window installation looks like.