Passivhaus Aluminum Windows in Seville: 2025

In Seville, 2025 is turning out to be the year when a lot of people are finally taking proper home insulation seriously—like, for real. And when I say “for real,” I mean windows: if heat gets in through there, it doesn’t matter how good your air conditioning is. Passivhaus aluminium windows are showing up in apartment renovations in Los Remedios, Nervión, or Triana because the problem is the same: blinds down at 5 p.m., the living room like an oven, and the A/C working flat out. Sound familiar? The key here isn’t “more power,” it’s less heat coming in and fewer leaks. With profiles featuring a proper thermal break, well-chosen double or triple glazing, and hardware that seals the way it should, you notice the home holds up better: fewer heat spikes, fewer weird drafts, and less street “micro-noise.” And watch out, it’s not magic: it’s that the whole system is designed to control infiltration. In a city with hot nights, that translates into sleeping without constantly fighting the thermostat.

Let me paint a very real scenario: a west-facing flat, the sun hitting hard in the late afternoon, and that feeling that the heat is getting in “through the gaps”. With standard windows, you do the usual: lower the blind, shut everything, turn on the AC… and even then the living room takes forever to settle. With a properly installed Passivhaus window, the first thing you notice is the silence (yes, even on streets with traffic), but the big thing is that the interior becomes more “stable”: you don’t go from comfortable to roasting in 20 minutes. Also, in Seville the issue of condensation is very noticeable in certain homes: interior bathrooms, small kitchens, dampness due to poorly solved ventilation… With joinery that seals well and the right glazing, you reduce those cold spots where water forms. That said: don’t confuse “sealing” with “shutting yourself in”. The smart move is to combine it with controlled ventilation if you’re aiming for a full Passivhaus level. In practice, many people start with windows and already see a clear drop in AC hours.

If in 2025 you’re going to replace windows in Seville and they just drop “this is Passivhaus” on you with no further explanation, ask specific questions. First: what profile it is (brand and series) and what values it has. A decent thermal break is not the same as a borderline one. Second: the glass. In Seville, triple glazing doesn’t always pay off if it’s poorly configured; sometimes a well-specified double-glazed unit with solar control and the right gas works better for your orientation and how you use the space. And third—the point almost nobody checks: the installation. You can buy a top-tier window and ruin it with a mediocre install: foam with no interior/exterior sealing, warped subframes, junctions to the masonry without the right tape… Result: leaks, noise, and a “drafty feeling” even when it’s closed. Ask them to explain how they’ll finish the perimeter, whether they use expanding tapes or membranes, and how they’ll deal with the shutter box (the classic weak spot). And if your home is older, be careful with “rush” measurements: in a real renovation there’s always a wall that’s out of square. Better to measure, set out properly, and avoid botched jobs you end up paying for in comfort.