Types of Insulation for Metal Buildings

A metal building is a steel or aluminum structure designed primarily for storage or as a workshop. These buildings are considered a cost-effective alternative to traditional framed construction, and may be used in either commercial or residential applications. Metal buildings are often left unheated, so it is particularly important to choose the correct insulation when erecting these structures.

Types

Metal building installers may used fiberglass batts, rigid foam or sprayed insulation to insulate these buildings. Fiberglass is the most affordable option, and is sold in thick blankets, or batts. It may be unlined or faced with a reflective vinyl coating. Sprayed insulation is a midrange price option for metal buildings. This liquid foam is sprayed into new or existing walls where it expands to fill the entire space. Rigid foam is the most expensive of the three and can be used on walls, ceilings, floors or even foundation walls.

Benefits

An insulated metal building will be more comfortable for workers due to the reduction in thermal transfer through the walls and ceiling. Insulation can also help protect stored materials or equipment from dramatic temperature changes, and helps to control moisture and humidity levels. Properly installed insulation also can reduce energy consumption and utility bills in heated buildings by minimizing the amount of heated air that's lost through the walls.

Features

To compare different types of insulation, consider the R-value of each material. R-value is a measure of thermal resistance, and higher R-values are associated with more effective insulating materials. According to energysavers.gov, fiberglass batts have an R-value between 2 and 3, while lined versions can ranger from 3.7 to 4.3. Sprayed and rigid foam have R-values between 4 and 8, meaning they are more effective than fiberglass on average.

Drawbacks

As with most materials, more effective insulation materials generally come with higher price tags. The higher upfront costs should be weighed against the cost savings of proper insulation over time, which could be linked to better protection for stored materials or to lower energy bills. The cost of installation and maintenance should also be considered.

Considerations

Each of these four types of insulation can be beneficial in certain applications. Faced fiberglass helps reflect light and minimize utilities bills. Regular fiberglass is very affordable and easy to install, and can be a good choice for those on a tight budget. Foam is a very effective insulator and helps to minimize air leaks. It won't sag over time like fiberglass, and can be used on thin walls or tight spaces. Spray foam can be installed in existing walls without removing drywall and finishes.

References

• FAQ About Metal Building Insulation
• Faced Insulation for Metal Buildings
• Energy Savers Types of Insulation