Improving R-Value with Wood Lathe and Plaster Wall Construction

When building a home, it's essential to prioritize insulation and energy efficiency. One effective way to achieve this is by using wood lathe and plaster wall construction. This method provides excellent thermal mass, which can help regulate indoor temperatures and reduce the need for heating and cooling.

In traditional construction methods, house wrap or tar paper is often used as a moisture barrier. However, these materials are no longer the most effective options. Instead, you can use water barrier paint to achieve better results. Another option is to install metal mesh over OSB (oriented strand board), followed by plaster and paint.

One of the benefits of wood lathe and plaster wall construction is its ability to provide a high R-value without compromising on aesthetics. The plaster finish can be smooth or textured, depending on your preference. Additionally, this method allows for irregularities in the wooden substrate to be hidden, creating a more seamless finish.

Another advantage of using wood lathe and plaster is that it can be done without expensive materials like rigid foam board insulation. Instead, you can use a combination of techniques like blood lath (metal lath nailed to studs) and Durrabond as a base coat for the plaster. This method provides excellent thermal mass and can help reduce energy costs in the long run.

For those who are concerned about rust, using galvanized products can be an effective solution. However, it's essential to note that metal lath may not be the most suitable option for all climates. In areas prone to high humidity or saltwater exposure, corrosion-resistant materials like blue board or cement-based boards might be a better choice.

In conclusion, wood lathe and plaster wall construction offers numerous benefits when it comes to improving R-value. By using water barrier paint or metal mesh over OSB, followed by plaster and paint, you can create a high-performance wall system that provides excellent thermal mass and energy efficiency. With the right materials and techniques, you can achieve a beautiful, functional space that's perfect for your needs.

Wood lathe and plaster wall r value