Quick Answer
When installing windows in earth sheltered homes, it's essential to prioritize energy efficiency, natural light, and reduced thermal bridging. This can be achieved by using large, south-facing windows with low-e coatings and double glazing. Proper sealing and flashing are also crucial to prevent water infiltration.
Window Selection and Placement
In earth sheltered homes, windows play a critical role in regulating indoor climate. Ideally, windows should be placed on the south-facing wall to maximize natural light and heat gain during winter. A minimum of 10% of the floor area should be allocated for south-facing glazing. For example, in a 1,000 square foot home, a minimum of 100 square feet of south-facing windows is recommended. Use large, fixed windows for reduced thermal bridging and improved energy efficiency.
Sealing and Flashing Techniques
To prevent water infiltration and air leaks, it’s essential to properly seal and flash windows in earth sheltered homes. Use a continuous bead of silicone sealant around the perimeter of the window frame, and ensure that the sealant is fully cured before backfilling. Flashing around windows should be installed above, below, and around the frame to prevent water from entering the building envelope. A minimum of 2 inches of flashing material should be used above the window frame to ensure adequate protection.
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