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If you feel cold air near a window or door, the useful first question is where and when the draft is noticeable—not which sealant to buy. A simple map can help you describe the problem without testing a hidden cavity or changing how the house breathes.
The U.S. Department of Energy’s home assessment guide recommends a walk-through of common areas such as window and door frames, outlets, baseboards, and service openings. It also says small or concealed leaks can be hard to find. Treat household observations as clues for an assessor, not as a measurement of all the air moving through the building.
Start with places you can see safely
Make a pass through ordinary, accessible rooms. DOE and ENERGY STAR list common areas such as doors, windows, attic hatches, and service openings; that list is a set of possible locations, not an instruction to enter hidden spaces. Note a draft from a normal standing position or a visible gap around a closed door or window. You can also look for visibly worn weatherstripping or caulk, but do not pull it out, probe a gap, remove trim, or decide that a specific material is the repair.
DOE’s home assessment guide describes a paper check for a normally closed door or window: place a small piece of paper where the closed edge meets the frame, close it normally, then see whether it pulls free without tearing. Skip the check if the opening sticks, is damaged, must remain available for exit, or would need force to close. Record the result as a clue only; it does not quantify leakage or identify a repair.
Do not use a candle, flame, incense, smoke, an exhaust fan, or a DIY pressure test. DOE materials describe specialized blower-door testing as a professional method; the same household guide also includes a smoke-and-fan procedure that is outside this article’s safety scope. Do not repeat it or switch off a furnace, water heater, fireplace, or other combustion equipment to test for drafts.
Draft observation map
Record only accessible areas. If you rent, use the same map to describe a maintenance request; do not alter building components.
| Zone | What to observe from a normal, safe position | Record |
|---|---|---|
| Windows and exterior doors | Draft felt near a closed opening; visible daylight or an obvious gap; visibly worn seal | Room/opening ID, date/time, weather, whether the opening was closed normally, and optional paper-check result |
| Room edges and visible service entries | Draft near a baseboard, wall-to-frame joint, or visible pipe/cable opening | Exact room and location; do not touch wiring, pipes, ducts, or equipment |
| Attic, crawlspace, basement, flue, or vent areas | Whether a concern is suspected or simply not inspected | Mark “not inspected—needs assessment.” Do not climb, enter, open a panel, or approach hot equipment |
| Room-level pattern | Whether the draft recurs in similar weather or HVAC conditions; whether it affects one room or several | Date/time, outdoor conditions, heating/cooling state if known, and any related moisture or odor concern |
Copyable note for a maintenance request
Room/opening:
What I noticed and where:
Date, time, and outdoor conditions:
Was the door or window closed normally?
Paper check, if safely used: stayed / pulled free / not tried
Other concern: moisture / electrical / near a vent or combustion appliance / none noticed
Photo or follow-up date:
When to hand the map to an assessor
Ask your utility or state/local energy office how to find a qualified home-energy assessor if drafts are widespread, the source is hidden, several rooms are affected, or you are considering work near a vent, flue, furnace, fireplace, or water heater. DOE explains in its assessment guide that assessors can use calibrated blower-door equipment, infrared imaging, and ventilation checks; those measurements are different from a room-by-room observation map.
Do not block vents, flues, combustion-air paths, or mechanical openings. Air sealing and ventilation work together, and DOE’s air-sealing guide warns that inadequate ventilation can allow moisture or harmful combustion gases to accumulate. For broader home projects, use the home-improvement preparedness guide; for a winter freeze checklist, see the winterizing home guide. Neither an observation nor this article approves a repair for your building.
