Understanding Thermal Efficiency in Window Frames: A Quick Guide
- comfortglaze
- Dec 9, 2024
- 1 min read
When it comes to Double Glazing, window frames and their thermal efficiency play a key role in the overall performance of the window. Let’s compare the R-values, which measure thermal resistance, across four common types of window frames:
1. Aluminium: The least thermally efficient, standard aluminium frames achieve an R-value of around R-0.37.
2. Thermally Broken Aluminium: With a thermal break, this type of aluminium frame improves efficiency, reaching an R-value of about R-0.50.
3. uPVC: A more efficient option, uPVC frames offer an R-value of around R-0.69, providing better insulation.
4. Timber: The top performer in thermal efficiency, timber frames achieve an R-value of approximately R-0.77, making them the best choice for energy efficiency.
Note: These R-values are based on the assumption that the window includes a high-performance, low-E glass, thermally improved spacer and argon gas filled double glazed unit.
The R-valur, for a standard aluminium frame with single glass achieve an R-value of around R-0.15.
In summary, while aluminium frames are the least efficient, upgrading your glass can significantly improve the thermal efficiency. uPVC, or especially timber frames, are the most thermally efficient. If you have existing timber frames, it really is worth looking at getting them retrofitted rather than installing brand new frames.
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The analysis of window frame materials reveals significant differences in thermal efficiency that can impact energy costs and comfort levels. When considering upgrades, especially Vegastars https://vegastar.nz/ in mind, one must weigh the benefits of investing in uPVC or timber frames against the initial costs. The long-term savings and environmental impact could make these options worthwhile, especially for old homes.