Aren concrete walls cold?
Actually, the interior concrete wall, being completely sealed off from the exterior weather, tends to stabilize the interior temperature. Concrete stores heat and cold efficiently and gives it off slowly into the room. This causes a wonderful thermal “lag time” – meaning that the heat absorbed into the wall during the day is then released into the room at night when the air temperature cools. By the early morning, the concrete has cooled to just above whatever the interior ambient night temperature was, and as the morning warms into the heat of the afternoon, the wall again gives off coolness into the room that it gained during the night. This thermal lag stabilizes the room temperature – especially in the summer – and prevents “spikes” in temperature, which keeps cooling bills lower in summer and winter.
