Quick Answer
Foam board is often considered superior to cellulose insulation for certain applications, particularly in cold climates, due to its higher R-value and resistance to moisture damage.
Insulation R-Value Comparison
When it comes to insulating a hemlock log home, the R-value of the insulation material is crucial. Foam board insulation typically has an R-value of R-4 to R-6 per inch, depending on the type and density of the foam. In contrast, cellulose insulation has an R-value of R-3.5 to R-4 per inch. For a typical 8-inch thick hemlock log, foam board insulation can achieve an R-value of R-32 to R-48, while cellulose insulation would only reach R-28 to R-32.
Moisture Resistance and Durability
Foam board insulation is also more resistant to moisture damage than cellulose insulation. While cellulose can absorb and retain moisture, foam board insulation remains dry and maintains its R-value even when exposed to water. This makes foam board a better choice for areas prone to high humidity or water exposure, such as bathrooms or kitchens. Additionally, foam board insulation is less likely to compress or settle over time, which can reduce its effectiveness and lead to air leaks.
Installation and Cost Considerations
When installing foam board insulation in a hemlock log home, it’s essential to choose the right type of foam board for the job. Closed-cell foam board insulation, such as XPS or EPS, is a popular choice due to its high R-value and moisture resistance. However, it’s more expensive than open-cell foam board insulation, which can be a more budget-friendly option. The cost of foam board insulation can range from $0.50 to $1.50 per square foot, depending on the type and quality of the foam. This can add up to a significant cost for a large log home, but it can provide long-term energy savings and improved comfort.
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