By David Parks · eXp Realty · The Apollo Group · 2 min read
Window and door inspections check that openings operate, seal, and protect against water and air leaks. Fogged glass, rot, and failed seals are the most common findings.
Windows and doors affect comfort, energy bills, safety, and curb appeal. They are also common places for water to enter.
| Key point | What it means |
|---|---|
| Single-pane windows | Found in older homes; low efficiency but can be repaired or restored. |
| Double-pane insulated windows | The standard for decades, often with low-E coatings. |
| Wood, vinyl, fiberglass, and aluminum frames | Each has its own wear patterns. |
Condensation or fogging between the panes, which means the seal has failed. Soft or rotting wood at sills, cracked glass, sticking sashes, damaged weatherstripping, and gaps around trim. Doors should open, latch, and seal evenly without daylight showing around the edge.
Basement bedrooms need an egress window large enough to escape through. Sliding glass doors and larger panes in doors should have safety glazing. If many windows are failing, ask for a replacement quote, since the total cost can add up quickly.
This article is general information, not legal, tax, financial or inspection advice. Every home and situation is different, so confirm details with a licensed inspector, lender, attorney or tax professional.
David is a Greater Denver real estate advisor with eXp Realty and The Apollo Group (Colorado broker license FA100103211). He has closed more than $55 million in volume, earned eXp Icon status in 2025, and holds a 5.0 rating on Zillow from 27 verified reviews.
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