How to Perform Window Inspection Like a Pro (Checklist)

Window inspection is rarely conducted alone, and it’s usually a part of a home inspection. But that doesn’t mean you have to go through that process just to find out whether your windows need a professional or not.

Using the following window inspection checklist, you can examine windows like a pro and fix minor issues. We’ll also tell you when to call an expert and who should pay for necessary repairs.

What You Need for a Window Inspection

Window inspection is quick and easy, and you can do it with simple equipment. A clear, dry day is best to check the windows, as you won’t have to deal with moisture issues and direct sunlight glare. You’ll need the following tools and materials too:   

• Notepad and pen (to record findings)
• Safety gloves and a stable ladder for exterior access
• Flashlight (to see dark corners)
• Screwdriver (to check hardware stability)
• Candle or smoke pen (to detect air leaks)
• Tape measure (to ensure windows fit within frames)
• Scraper (to remove old caulk or weather-stripping)
• Sealant/Caulk and a putty knife (for minor repairs)

Professionals use a moisture meter or an infrared thermometer as well. But don’t worry, there are other signs that help you detect moisture or heat loss.

Window Inspection Checklist

Here’s a handy window inspection checklist for a smooth, comprehensive evaluation:

Interior Inspection

• Start with opening and closing the window. If everything is smooth, no sticking or jamming, move on to other parts. Don’t forget to inspect tilting features as shown in this video tutorial (if applicable).
• Test the locks, handles, and hardware for looseness, stiffness, or damage.
• The glass shouldn’t have cracks or scratches. Also, make sure there’s no sign of moisture, condensation, or fogging on the panes and glass surfaces.
• Check the window casing and trim for visible signs of water damage, mold, or rot. Do the same for the windowsill and surrounding areas.
• Examine caulking for gaps, cracks, or deterioration. Use a candle or smoke pen to see if there’s any draft.
• Inspect weather-stripping for wear, compression, or missing sections that allow air leaks.
• If there are window screens, your window inspection checklist must include looking for tears, warping, or missing sections too.

Exterior Inspection

• Check the exterior frame for rot, swelling, and damage. Also, look for peeling, blistering, or cracking paint or finish to detect moisture problems.
• Inspect glass panes and seals for cracks or loose panes, as well as using a screwdriver for hardware.
• Check flashing around the window for damage or missing parts. If everything seems fine, you don’t need to worry about water intrusion.
• Examine exterior caulking and sealant joints for deterioration, gaps, or cracks; use a putty knife if needed.
• Make sure the exterior windowsill is rot-free and doesn’t have debris buildup that blocks the drainage.
• Look closely at any metal component and see if there’s rust or corrosion.
• Finish the inspection by verifying that window screens and storm windows are intact.

Common Window Problems and How to Fix Them

Condensation between glass panes, cracked glass, broken caulking, difficult-to-operate windows, and rotting or warping in frames are common problems to find during window inspection.

Minor issues you can often repair include re-caulking, replacing weatherstripping, tightening loose hardware, applying lubricant, or cleaning weep holes. Other issues like broken seals in double or triple-pane windows and major frame damage aren’t as DIY-friendly and require professional assistance.

Frequently Asked Questions

How often should windows be inspected?

Ideally twice a year and at least once a year.

Do home inspectors inspect windows?

Yes, assessing all doors and windows is a part of home inspection.

How do inspectors check windows?

They’ll evaluate all the points mentioned in the window inspection checklist. But thanks to using better equipment and experience, they can detect hidden issues more efficiently.

How much does a window inspection cost?

There isn’t a specific number for a window inspection cost, as it’s included in the total cost of the property inspection (which is typically about $300 to $500).

Who should pay for window installation or repair?

Normally, if the damage is caused by wear and tear, it’s the homeowner’s responsibility. And if it’s caused by the tenet (due neglect, for instance), it’s their responsibility.

The Bottom Line

Faulty windows can inflate your energy bills by up to 25-30%. Fortunately, a thorough window inspection could save thousands in future repair costs and energy consumption. Choose a bright day, clear any obstructions near the windows, grab your checklist, and inspect away!