Aluminum Windows and the New 2025 Regulations in Alicante

If you’re thinking about changing your windows in Alicante in 2025, pay attention: the old “just put in some sliding ones and that’s it” no longer cuts it. The new energy requirements are getting stricter—especially for renovations—and that means they’ll ask you for better insulation performance. Where do you notice it? A “run-of-the-mill” window may fall short on thermal insulation and airtightness. And here, with the sun beating down and the sea humidity, it shows fast: the living room overheats by mid-afternoon, the air conditioning can’t keep up, and the bill goes up.

A typical example: an apartment in the San Juan Playa area with old windows and a “classic old-style” roller-shutter box. In winter you don’t get as cold as in Burgos, sure, but you do notice drafts and occasional condensation, and in summer the heat stays trapped inside. With the 2025 regulations, the goal is for the home to lose less energy, and that pushes you to choose profiles with thermal break and glazing that actually does its job. The key is to understand that it’s not just about changing the aluminum: it’s about properly sealing the home.

I’ll tell you the way I’d tell a friend: when someone says to me, “I want aluminum because it lasts,” I ask: “and what about the noise, the heat, and the air that sneaks in?” In Alicante, with traffic, motorbikes, and terraces, sound insulation can be the change you appreciate the most. And what matters here is the whole set: profile + glass + hardware + installation. A well-adjusted tilt-and-turn usually seals better than a basic sliding window, and you notice it because you no longer hear the avenue as much and you don’t have to turn up the TV volume.

Another very real point: the glass. If you install double glazing without thinking it through, you might end up the same. For example, solar-control glass helps keep the living room from turning into an oven in August (if the sun hits it directly, you’ll notice it on day one). And watch out for the roller-shutter box: a lot of air leaks come from there. If you improve it, you’re gaining comfort without touching a single meter of wall. With the 2025 regulations, they’re going to look at your overall performance, so it’s worth choosing wisely, not by catalogue.

The number-one mistake I see in renovations (in Elche and also in Alicante city) is replacing the window and leaving everything else “as it was.” It looks new, yes, but then surprises show up: poorly finished silicone, uninsulated shutter boxes, or unprotected foam that degrades and lets air in again. The result? You still have drafts and you think “windows don’t work.” With the new 2025 regulations, it’s also more likely they’ll ask you to justify performance or, at the very least, that the installer specifies what you’re having fitted. And that’s where it helps to go in with a clear checklist: what type of opening you want, what glazing, and how the perimeter is going to be sealed.

A real case: a home with minimal work—thermal-break frames are installed, but the warped subframe isn’t corrected. The sash ends up closing under strain, and within a year the misalignments start. That’s why, rather than obsessing over “the best brand,” focus on a properly done installation and on details like sealing with the right tape or mastic and proper leveling. If you do it this way, you’ll notice the improvement in your bill and in comfort from the very first summer.