An uninsulated basement ceiling may account for up to 10% of a house's heat loss
The lack of insulation under the ground-floor ceiling above the basement can cause a loss of 5 to 10% of a building's thermal energy. Specialists point out that insulating from below is a relatively simple and inexpensive solution.
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Why the cellar lets heat escape
Many homeowners insulate walls and the roof but forget the cellar. Meanwhile, an uninsulated ceiling above the cellar can let out 5 to 10% of a building's heat energy (Чому будинок швидко втрачає тепло: експерти вказали на можливу проблему – UNIAN) (Чому будинок швидко втрачає тепло: експерти вказали на можливу проблему. - УНІАН – uazmi.org). According to information provided by the portal Kerteszkedj, the problem can be noticeable in living spaces even when they are well heated.
Cold floors as a warning sign
The example cited in the publication concerns a owner of a single-family house whose feet regularly felt cold in a well-heated living room. After insulating the cellar ceiling, the floor became warmer and the room retained heat better.
How much insulation can help
Specialists estimate that proper cellar insulation can reduce total heat losses by more than half. In some single-family homes this translates into lowering heating costs by about 5%. The result, however, depends on the condition of the building, the structure of the ceiling, the temperature in the cellar, and the type of heating system.
Cost and method of execution
Insulating a cellar ceiling from below with insulation boards costs about 20–50 euros per square meter. The work is relatively simple and does not require intervention in the building's other partitions, which is why it is often chosen as the first stage of thermal modernization.
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