Yes, there can be several benefits to doubling the insulation in a custom-built house rather than using a single layer. Here are some advantages to consider:
Enhanced thermal performance: Doubling the insulation effectively increases the R-value, which measures the insulation's resistance to heat transfer. A higher R-value indicates better insulation performance. By doubling the insulation, you create a thicker barrier that reduces heat flow, resulting in improved energy efficiency and reduced heating and cooling costs.
Better soundproofing: Increased insulation thickness can also provide better soundproofing. Sound waves have more difficulty penetrating thicker insulation layers, reducing the transmission of noise from outside or between rooms within the house. This can lead to a quieter and more comfortable living environment.
Reduced thermal bridging: Thermal bridging occurs when there is a break in the insulation layer, allowing heat to transfer through the more conductive materials, such as studs or beams, in the building envelope. By doubling the insulation, you can minimize thermal bridging and maintain a more consistent temperature throughout the house, resulting in increased comfort.
Future-proofing: Building codes and energy efficiency standards may evolve over time, with increasing emphasis on energy conservation. By doubling the insulation during the construction phase, you can exceed the minimum requirements and potentially future-proof your home against stricter regulations. This can be particularly beneficial if you plan to live in the house for many years.
Environmental considerations: Increasing the insulation thickness can contribute to a more sustainable and environmentally friendly home. By reducing the need for excessive heating or cooling, you lower energy consumption and decrease greenhouse gas emissions associated with energy production.
However, it's important to note that doubling the insulation may come with additional costs, both in terms of material and installation. It's advisable to consult with an architect, builder, or insulation specialist who can provide guidance specific to your location, climate, and budget to determine the most cost-effective and efficient insulation strategy for your custom-built house.