Thermal conductivity, pressed steel frame, insulated wall.

In summary, the conversation discusses the use of exterior commercial frames (.053") embedded in an 8" thick concrete wall with layers of polystryrene (3# density) on each side. The frame rests on foam inside and outside the building and is grouted solid with poured in place concrete. The main question is whether there is a significant difference in thermal conductivity between a one piece continuous frame and a two piece frame with a thermal break near the exterior of the building. This is a debated topic in both residential and commercial ICF construction and a formula and test methodology to confirm the difference would be helpful. There is also a consideration of how the thickness of the metal frame, specifically a hot dipped zinc coated steel frame, may affect the thermal
  • #1
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Exterior commercial frames (.053") embedded in a concrete wall 8" thick with 3" layers of polystryrene (3# density) on each side of concrete cavity.

Frame rests on foam inside and outside of building. Frame is grouted solid with poured in place concrete.

Is there an appreciable (to be defined in % change) difference in the thermal conductivity of a one piece continuous frame from outside to inside of building as compared to a two piece frame that has an isolation (thermal) break along its length near the exterior of the building.

Hotly debated topic in residential and commercial ICF construction.

Formula and test methodology to confirm would be helpful.

Is the thermal conductivity in this example change by thickness of metal. is a thin metal frame any more or less conductive than a heavy gauge pressed steel frame?
 
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  • #2
frame is hot dipped zinc coated steel
 

1. What is thermal conductivity?

Thermal conductivity is a measure of how well a material can transfer heat. It is the rate at which heat passes through a material per unit of thickness, when there is a temperature difference across the material.

2. How does thermal conductivity affect a pressed steel frame?

The thermal conductivity of a pressed steel frame can impact its ability to retain heat. If the thermal conductivity is high, the frame may lose heat quickly and result in a less energy-efficient structure. However, if the thermal conductivity is low, the frame can help to insulate the building and retain heat.

3. Why is insulation important for a steel frame?

Insulation is important for a steel frame because steel is a highly conductive material, meaning it can transfer heat quickly. Without proper insulation, the steel frame can become very hot or cold depending on the outside temperature, making the building uncomfortable and less energy-efficient.

4. Can insulation be added to a pressed steel frame?

Yes, insulation can be added to a pressed steel frame. There are various types of insulation materials that can be added to the frame, such as foam or fiberglass, to help reduce thermal conductivity and improve energy efficiency.

5. How can thermal conductivity be improved in an insulated wall?

One way to improve thermal conductivity in an insulated wall is to use materials with a low thermal conductivity, such as foam or fiberglass insulation. Additionally, ensuring proper installation and sealing of the insulation can also help to reduce heat transfer and improve thermal conductivity.

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