Choosing the right insulation for your home is crucial. This article explores whether the cost is the only advantage of Styrofoam (EPS boards) over rock wool. We will also look at the differences in installation costs per square meter for these two types of insulation and which one more effectively reduces heating expenses.
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When installing a contact facade you have two primary options: Styrofoam (EPS boards) or rock wool. Both solutions come with their own set of pros and cons. Material costs and installation costs per square foot are important factors to consider. Given that home insulation is typically a long-term investment meant to last decades, making an informed decision is crucial.
The Importance of Good Insulation
The decision to insulate your home is inherently good, regardless of whether you choose rock wool or Styrofoam. Insulating your home can be compared to wearing a jacket in winter – regardless of whether it’s down or regular, it keeps you warm. Similarly, any facade will significantly reduce heating costs and make your home warmer. Although there are differences between the two materials, both will provide substantial benefits.
Main Advantages of Rock Wool
Superior Breathability
One of the primary advantages of rock wool over EPS boards is its superior breathability. Rock wool allows walls to “breathe,” preventing moisture buildup, whereas Styrofoam creates a hermetic seal that can trap moisture. This is measured by the water vapor diffusion resistance factor (µ). Lower values indicate better breathability.
For example, air has a µ value of 1, rock wool has a µ value of 1.2, and Styrofoam has a µ value of 30. This means rock wool facilitates better moisture transfer, making it preferable for certain applications.
Fire Resistance
Another significant advantage of rock wool is its fire resistance. Made from natural stone, rock wool can withstand temperatures above 1800 degrees Farenheit (aprox. 1000 degrees Celsius), making it a safer choice in case of fire, especially for larger residential buildings and high-rises. To fully leverage this advantage, other materials used in the facade construction, such as adhesives and coatings, must also be non-combustible.
Sound Insulation
Rock wool also provides better sound insulation due to its structure, which absorbs sound rather than reflecting it, as Styrofoam does. While this difference might not be noticeable in everyday use, it can be significant for buildings with specific noise reduction needs.
Flexibility in Application
In certain scenarios, rock wool is the only viable option, such as when insulating curved walls where rigid EPS boards are unsuitable.
Advantages of Styrofoam (EPS Boards)
Cost-Effectiveness
One of the main reasons many private homes and smaller residential buildings use EPS boards is their lower cost. When insulating large areas, even a small difference in material cost per square foot can add up, making Styrofoam a more economical choice. Both materials will effectively insulate the building, but the lower cost of Styrofoam can be a decisive factor.
Ease of Installation
EPS boards are easier and quicker to install. They are perfectly flat, adhere easily to facades, and often do not require additional fastening with anchors, unlike rock wool. This ease of use means there are more contractors offering Styrofoam insulation services, making it a more accessible option.
Long-Term Performance
Despite being derived from petroleum, Styrofoam is not harmful to health. It maintains its properties up to temperatures of 175 degrees Farenheit (aprox. 80 degrees Celsius), making it suitable for most applications. Although it might not be ideal for high-temperature areas like chimneys, it has proven its durability over decades in many buildings.
Conclusion
Both Styrofoam and rock wool have their unique advantages and are suitable for different applications. The choice between them depends on your specific needs, budget, and the particular requirements of your building. By considering the benefits and limitations of each material, you can make an informed decision that ensures effective, long-lasting insulation for your home.