AI-generated cabin concept, used for illustration.
In this guide
Air sealing aims to reduce unintended leakage. It should be coordinated with the ventilation the cabin actually needs, rather than treated as an instruction to close every opening you can see.
Identify the purpose of the opening
A gap around an unintended joint is different from a designed vent or an appliance's required air path. Before modifying unfamiliar openings, have the relevant building or service professional identify their function.
Your Home: ventilation and airtightness distinguishes planned ventilation from uncontrolled leakage. The ENERGY STAR: seal and insulate offers a US starting point for considering air sealing and insulation together.
For an existing cabin, describe the comfort problem: where a draft is felt, under what weather conditions and whether it changes when equipment runs. That gives an assessor a better starting point than a request to seal the entire building indiscriminately.
Request a coordinated scope
Ask which locations will be treated, what products are appropriate and how the result will be checked. Include ventilation and any combustion-appliance considerations in the professional review.
An illustrative decision is to investigate a persistent draft near a window before buying new heating equipment. The cause may involve installation details, but it should be established rather than guessed from the symptom alone.
Keep a record of the work and any changed operating instructions. The goal is controlled airflow and improved comfort in a functioning building, not merely a longer list of places filled with sealant.