Metal panels and roofs are an important part of designing and constructing a durable steel building envelope system. However, these panels lack built-in insulation. As a result, insulation, air barriers, and vapor retarders need to be added to improve energy efficiency. For owners and users looking for energy-efficient solutions for metal buildings. Spray polyurethane foam (SPF) insulation is the best choice for steel buildings.
Closed-cell spray foam offers good insulation, air tightness, and structural strength. Therefore, it is the best insulation for metal buildings. In addition, it helps to control temperature and minimize condensation. To ensure proper application and performance of spray foam on steel buildings, it is important to follow best practices and design considerations.
In this comprehensive guide, we will describe the advantages of using spray foam insulation in metal buildings. Spray foam saves energy, improves air quality, and extends the service life of metal structure buildings.
Table of Contents
What is Spray Foam Insulation?
Spray foam insulation creates a solid barrier. It restricts airflow through walls, floors, and ceilings. In addition, it seals gaps around light fixtures and electrical outlets, and where walls meet windows and doors. This makes SPF suitable for new construction projects, attics, crawl spaces, and rim joists.
For construction projects, spray foam can be used wherever there is a cavity. This insulation is therefore widely used in industrial and commercial steel buildings. The great thing about this material is that it does not lose its structure.
Unlike other insulation materials that can compress or sag over time. Spray foam remains strong and stable long after installation. This is because it fills in any cracks and splits.
Common spray foam insulation is usually categorized into two types: open-cell foam and closed-cell foam.
Open-cell Foam
Open-cell foam is softer and more flexible. This is because its holes are not completely closed. This unique design allows the foam to be more flexible and malleable than other materials.
Open-cell foam is typically used in the rough-in stage of construction to fill cracks and voids in walls and floors. It is especially used to fill cracks and voids around pipes and wires.
Closed-cell Foams
Closed-cell foam consists of tightly arranged holes that prevent the passage of air and water. Due to their sealed structure, closed-cell foams are significantly more reliable than open-cell foams. On the other hand, closed-cell spray foam is a recommended insulation material for steel buildings.
Advantages of Spray Foam for Steel Buildings
Improvement of Structural Integrity and Stiffness
Closed-cell spray foam has high compressive strength. It is suitable for reinforcing metal structures, especially walls and roofs. In addition, it provides extra protection in adverse weather conditions such as high winds or hail.
Sound Insulation Properties
Closed-cell spray foam has a high sound insulation capacity. It reduces noise pollution from traffic and construction sites near buildings. This can help you build a quiet and comfortable indoor space.
Temperature Regulation
Spray foam insulation is more effective than standard fibreglass or cellulose insulation in regulating the temperature of metal buildings. During the hot summer months, the airtightness created by spray foam helps keep cold air inside. In cold winter, spray foam prevents warm air from leaving the room.
Reduction of Condensation
Spray foam prevents condensation in steel buildings. Its airtightness prevents moisture from collecting on interior surfaces such as walls and ceilings, preventing mold growth and potential health risks. In addition, closed-cell spray foam has a high compressive strength, enhancing the structural integrity and stiffness of metal buildings.
Advantages of Closed-cell Spray Foam Insulation for Metal Buildings
- Spray foam insulation has a higher R-value than other types of insulation. This means that it minimizes heat loss or gain and thus improves insulation performance.
- Spray foam insulation is easy to use and quick to install. It requires no special equipment or skills and is a low-cost solution.
- Spray foam insulation creates an airtight seal. This prevents heat transfer through gaps and cracks. As a result, this can greatly improve the energy efficiency of metal buildings.
- In addition, it prevents dust, pollen, and other allergens from entering the room. This can effectively improve indoor air quality.
Disadvantages of Closed-cell Spray Foam Insulation for Metal Buildings
- Spray foam insulation can cost more than other types of insulation. However, it is a long-term solution. Over time, it can save money on energy bills.
- Installation of spray foam needs to be done by an expert. This may increase the installation cost of the project.
- The application of spray foam insulation can be tricky. Any residual foam may need to be removed manually.
Cost of Spray Foam Insulation
- The installation cost of spray foam insulation varies. It costs about $1.25 to $4.50 per square foot.
- The overall cost depends on the square footage of your location. This is because the larger the area, the higher the cost of insulation.
- Thicker insulation costs more than thinner insulation, so be sure to include it in your budget.
- Labor prices vary depending on the complexity of the location and where you live. Typically, a labor rate of $0.44 to $1.55 per foot should be factored into the budget.
Best Practices for Using SPF Insulation in Metal Buildings
Recommended Application
Spray foam is a commonly used insulation for steel buildings. It can be used to fasten and fill metal roofs and walls.
Surface Preparation
Before applying SPF, make sure the surface of the metal panels is free of moisture, lubricants, dust, and other contaminants.
Application Techniques
The method of applying SPF may affect the performance and appearance of the foamed panel. The use of the recommended “picture frame” technique produces optimum insulation density, adhesion, and thickness.
Avoid the Use of Release Fabric Membranes
The use of release fabric membranes between the foam and metal panels in a wall assembly is not recommended. This is because it may create gaps between the SPF and the metal panels.
Minimize Stress-induced Deformation
Be aware that stress-induced deformation can occur on 29-gauge or thinner materials. To minimize this effect, use spray foam according to the manufacturer’s instructions.
Fire Safety and Thermal Performance
National and local fire codes should always be followed. Exposed SPF may require additional insulation or fire safety measures. Ensure compliance with thermal performance standards of energy codes.
Contractor-to-contractor cooperation
Make electrical and HVAC contractors aware of the use of SPF. This avoids covering junction boxes, maintains proper equipment sizing, and provides adequate make-up air. Prevent SPF chemicals from entering the building’s ventilation system.
Summary
Insulating steel buildings with closed-cell spray foam insulation has several advantages. These include increased energy efficiency, cost savings, improved air quality, and structural strength. Closed-cell spray foam provides excellent insulation, air tightness, and moisture resistance.
In addition, spray foam insulation protects your investment. And it ensures the long-term performance of steel buildings by creating a comfortable, efficient environment. That makes it the ideal insulation for steel buildings.
