10/17/2024
The previous post was showing a cross section of a wall in a "shipping container" house. The temperature distribution in the wall is colored; red being warm and blue being cold. Can you guess which side is indoors and which is outdoors? You can see where the blue cold from outside is penetrating into the house. Why is it so cold in that spot?
Engineers call this a thermal bridge. The heat inside your home is jumping onto this convenient bridge and escaping.
The next image shows the flow of heat (heat flux). In this case, the red colors indicate places where heat is escaping the fastest (ie. the thermal bridge).
Modern energy codes require the construction of walls to have a minimum insulative value. For most constructions, such as wood studs with fiberglass batt insulation, the insulative value is well known. However, non-standard constructions, such as steel container houses, can have very different constructions.
If you need help showing your calculations to the building code plans reviewer, please give us a call!