Firstly the answer is YES. Now, lets see why bubble foil is a good insulation.
Bubble foil, also known as bubble insulation or reflective bubble wrap, is a type of insulation material that consists of layers of bubble wrap sandwiched between reflective foil surfaces. It is designed to have reflective properties to reduce radiant heat transfer, minimizing thermal bridges, acting as vapor barriers and more. Here are some considerations regarding the effectiveness of bubble foil as insulation:
Reflective Properties: The primary function of bubble foil is to reflect radiant heat. It can be effective in reducing heat gain during hot weather and minimizing heat loss during colder conditions. Reflective bubble insulation has R value. The R value depends on the bubble height. When installed against air spaces the assembly R value increases depending on heat flow direction and ambient temperature.
R-Value: While bubble foil has reflective qualities, its thermal resistance, often measured by its R-value, is relatively low compared to traditional insulation materials like fiberglass or foam board. The R-value indicates a material’s ability to resist heat flow, and higher R-values generally imply better insulation performance. Bubble foil is often used more for its reflective capabilities than for its R-value.
Bubble Height Impact on R-Value: the R-value of reflective bubble insulation depends on the height of the air bubbles. Generally, a greater bubble height can contribute to a higher R-value. The trapped air within the bubbles acts as insulation against conductive and convective heat transfer.
Installation and Ambient Temperature Impact: The assembly R-value, or overall insulation performance, can increase when reflective bubble insulation is installed against air spaces. The effectiveness of the insulation also depends on the direction of heat flow and the ambient temperature. In some cases, reflective insulation can work more effectively when facing an air space, as it enhances the reflective properties
Application: Bubble foil is commonly used in specific applications, such as attic spaces, crawl spaces, or as an additional layer in wall assemblies. It is often used in conjunction with other insulation materials to provide a combination of radiant and thermal insulation.
Cost and Ease of Installation: Bubble foil is relatively inexpensive and easy to install, making it a popular choice for certain DIY projects or temporary insulation needs.
In summary, bubble foil can be a suitable choice for specific applications where reflective insulation is desired, and where a low-cost and easy-to-install solution is needed. Consideration should be given to the specific requirements of the space, local climate conditions, and whether additional insulation materials are needed for optimal results. Consulting with a local insulation professional can provide tailored advice based on your specific needs and circumstances.
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