Passivhaus Aluminium Windows in Alicante 2025

If you live in Alicante, you know what it’s like to sleep with the fan on full blast in August. That’s why in 2025 many people are switching to aluminum Passivhaus windows: it’s not for show, it’s about comfort and your energy bill. Put simply: a window system with Uw ≤ 0.85 W/m²K, low-e triple glazing and Class 4 airtightness makes a difference from day one. Here’s a real example: an apartment in Playa de San Juan, south-facing. With old sliders, the living room was an oven at 16:00. After switching to casement sashes with a thermally broken aluminum frame and a warm-edge spacer, the indoor temperature dropped by 3–4 °C without turning on the AC. Plus, with a g-value around 0.5 you keep the sun from blasting in like a blowtorch while still preserving daylight. Noise? You can tell the difference when the TRAM goes by: the glazing cut about 40–45 dB and conversation no longer competes with the street. The best part? you end up running the air conditioning fewer hours and the indoor temperature stays stable, even during heat waves. This isn’t magic: it’s infiltration control and solar management designed for our coastal climate.

I'll be blunt: you can buy a good window and ruin it at installation. The trick is to seal the perimeter well, address the shutter box, and measure. In a townhouse in Elche we did this: a thermally insulating subframe, expanding tapes around the perimeter, EPDM membranes to the exterior, and low-expansion foam only as infill, not as a seal. We switched the roller shutter to a monobloc unit with an airtight shutter box and double-brush guides. Before plastering, smoke test; at the end, blower-door: we went from constant drafts to ≤ 0.6 ACH50. Practical result: goodbye dust, less traffic hum, and more even temperatures between rooms. Watch out for "micro-ventilation": it's not Passivhaus. If you want fresh air without losing efficiency, think about a double-flow ventilation system with heat recovery; your CO₂ levels drop and you won't open windows at 35 °C at four in the afternoon. Installer details that make a difference: insulating shims under the frame, sealed junctions with the sill flashing, and finishes that allow expansion without cracking. That's what separates a good headline from a good result.

Let's talk numbers and salt spray. In 2025, an installed aluminum Passivhaus window typically ranges from 650 to 1,100 €/m²; if you add a roller shutter with an airtight box, add 15–20%. Typical lead times: 6–8 weeks in peak season. Grants? In the Valencian Community, energy-retrofit subsidies linked to European funds are still active: if your project reduces your home's energy demand, you can qualify for attractive percentages; request an energy performance certificate before and after, plus photos and itemized invoices. Next Generation grants continue in 2025, check with your city council or the Generalitat for requirements and quotas. On the coast (Santa Pola, El Campello), pay attention to the finish: ask for certified "Seaside" lacquer, hardware, and A4 stainless steel fasteners. And maintenance: a fresh water rinse once a month on profiles and tracks extends the life of the assembly; in Alcoy or Elda, with less salt spray, you can space it out to quarterly. Useful tip: check shutter seals and brushes every summer; replacing a seal kit in time prevents noise and leaks. In the end, it's not just about paying less for electricity, but about gaining quiet and comfort every day of the year.