Which window material is best for indoor insulation in winter?
Release date:
2025-09-01
During autumn and winter, indoor temperatures are typically higher than outdoor ones. To prevent heat loss indoors and block cold air from entering (such as through drafts), the window’s thermal insulation and heat-retention capabilities play a critical role. In fact, factors like the window frame material, glass thickness, sealing quality, and even the window’s shape all determine whether you’ll enjoy a warm and cozy winter.
How can window frames become more cold-resistant?
Preferentially choose broken-bridge aluminum alloy.
When classified by window frame material, aluminum alloy and PVC windows are currently the two most common and mainstream options. Among these, insulated bridge-type aluminum alloy windows are widely regarded as the best choice for thermal insulation and cold protection. This innovative design effectively separates the inner and outer layers of aluminum while maintaining a strong, seamless connection, creating a new type of heat-resistant aluminum profile. As a result, these windows significantly enhance insulation performance, offering superior air-tightness compared to both aluminum and PVC windows—ensuring that even in areas prone to heavy winds and sand, indoor windowsills and floors remain dust-free.
PVC frames can be fitted with layered plastic.
The downside of PVC frame materials is that they tend to become drafty over time, and the gaps at the joints are often too large to seal effectively. In such cases, the best solution is to first apply a layer of sponge around the window frame, then cover the entire window with a plastic shield. This plastic not only absorbs heat efficiently but also creates an airtight barrier, helping to maintain a stable, comfortable temperature inside.
Pay attention to the painting quality of aluminum-clad wood frames.
Aluminum-wood windows feature an additional layer of aluminum alloy wrapped around solid wood, enhancing the door and window’s airtightness. This design effectively blocks out wind and sand, preventing ice and condensation buildup even during cold winter months—and it also keeps noise from sneaking indoors. However, wooden components require more careful maintenance, particularly paying close attention to the quality of the wood frame’s paintwork to avoid corrosion or air leaks.
How can glass retain heat better?
Prioritize using vacuum glass.
Vacuum glass is similar to insulated glass, but it offers superior thermal performance because the two flat panes of glass in vacuum glass are tightly sealed around the edges, the space between them is evacuated to create a vacuum, and the vent hole is then hermetically sealed. This results in excellent insulation—but at a higher price.
How can curtains improve insulation?
In winter, curtains need to address the issue of insulation—flocked curtain fabrics are thick and offer excellent warmth retention. According to research by Japanese interior designers, among all colors, deep red provides the best thermal protection and is ideal for use during the colder months.
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