Should you really seal the large gaps in your balcony?
Release date:
2025-09-01
Why do some gaps appear when installing doors and windows on balcony enclosures—this issue is especially noticeable in older residential areas. When it comes to balcony enclosure materials, it’s best to choose **thermal-break aluminum** doors and windows. Meanwhile, plastic steel doors and windows for balcony enclosures are gradually being phased out of the market, with fewer and fewer consumers opting for this material each year. As a result, thermal-break aluminum has become the most popular and dominant material currently available for balcony enclosures.
1. If the gap around the balcony enclosure is significant—specifically, 5 cm or more—then the window and door manufacturer likely underestimated the dimensions when installing the enclosure. However, if the discrepancy is less than this amount, it’s possible that this occurred during balcony renovations in older residential areas. But in newer developments, it would almost certainly indicate a mistake on the part of the manufacturer.
2. It’s possible for balcony windows and doors to have significant gaps in older residential areas, as balconies in these neighborhoods often deviate significantly from standard dimensions—particularly in terms of unevenness. When designers from window and door manufacturers take measurements during the design phase, they typically use the lowest point as their reference to ensure proper alignment. This approach guarantees that the windows and doors will be installed perfectly level. As a result, you may notice larger gaps on one side of the balcony while the gaps on the other side remain narrower—this is especially true at the bottom. Additionally, if the balcony itself has a sloped angle, window and door manufacturers usually incorporate a sloped fixing frame into the window sash itself to accommodate the unique shape.
3. In new residential communities, balcony enclosures typically don’t have very large gaps, since balconies in these areas are usually built to precise standards with minimal variations. As a result, measuring the dimensions of doors and windows for balcony enclosures in new developments is generally straightforward, and the measurements tend to be quite accurate. However, manufacturers still leave a small amount of extra space just in case—after all, some customers might consider even 1–2 cm of gap as significant. But window and door manufacturers can’t produce perfectly seamless installations, as the frames still need to be adjusted horizontally during the installation process. If there were absolutely no gaps at all, it would become impossible to properly align the frames, potentially leading to uneven installation across the entire structure.
Why do some gaps appear when installing doors and windows on balcony enclosures—this issue is especially noticeable in older residential areas. When it comes to balcony enclosure materials, it’s best to choose断桥铝 (thermal-break aluminum) doors and windows. Meanwhile, plastic steel doors and windows for balcony enclosures are gradually being phased out of the market, with fewer and fewer consumers opting for this material each year. As a result, 断桥铝 has become the most popular and dominant material currently available for balcony enclosures.
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