Read the evidence
A cold chair beside a door is an observation. A failed door seal is one possible explanation. Air sealing addresses uncontrolled air movement through unwanted openings. It does not solve every source of discomfort.
Cold surfaces, uneven heating and open windows can feel similar. Begin with a question you can investigate without dismantling anything: is outside air entering at the closed door edge?
A useful goal identifies a location, an ordinary activity and a check. Avoid promising a bill reduction before you have measured anything. The starter plan will separate observations, proposed work and the evidence needed to judge it.
Supplied case
Rowan owns a small house. The reading chair feels drafty beside the closed north entry on windy evenings. No water damage or equipment fault has been reported.
Write one comfort goal and one unanswered question in the goal section.
Attempt first, then compare the worked response
Goal: reduce the draft at the reading chair while keeping the north door easy to open. Question: does air enter at the closed door edge?
The response describes the experienced problem without assuming that insulation or a replacement door is necessary.
Check your response: Name the location, preserve normal door operation and leave the cause open for investigation.
Concept reference: U.S. Department of Energy, Consumer Guide to Air Sealing the Home.