Replacing old windows with Salamander double glazing — complete apartment renovation guide Bucharest 2026

When is the right time to replace your windows?

7 clear signals that your windows need replacing:

• Condensation between glass panes — the thermal glass seal has failed. Cannot be repaired — must be replaced.
• Draughts with windows closed — seals have worn. Temporary fix possible, but replacement is more economical after 15+ years.
• High energy bills in winter — old windows can account for 30–40% of heat losses. Old Uw 2.8 W/m²K vs modern Uw 1.0 W/m²K = nearly 3× more heat lost.
• Excessive street noise — old windows: 20–25 dB. Modern Salamander: 38–47 dB.
• Difficulty opening/closing — repeated hardware repairs cost more than replacement.
• Yellowed or cracked profiles — old PVC without UV stabilisers degrades in 10–15 years.
• General renovation — best time for new windows is during renovation when walls are already exposed.

Real savings from replacing windows

For a 60 m² Bucharest apartment with old windows:

• Heat losses through windows: ~35% of total
• Heating cost reduction after BluEvolution 92 + Low-E + nZEB installation: 65–75%
• Annual estimated saving: 280–500 EUR
• Payback period: 6–10 years

Which Salamander profile for renovation?

GreenEvolution 76 — best value for standard renovations. Uw 0.73, up to 42 dB, 76 mm depth fits existing openings without structural changes.

BluEvolution 92 — high standard. Uw 0.70 (double Low-E) or 0.55 (triple). Up to 47 dB acoustic insulation.

BluEvolution 92 ALU — premium aesthetics. Aluminium appearance with PVC performance. Any RAL colour without yellowing risk.

Common mistakes to avoid

• Choosing by lowest price — cheap profiles cost more over 30 years
• Not checking hardware brand — insist on Roto or Siegenia
• Installation without Blaugelb Triotherm+ precasings — eliminates 30–40% of thermal performance
• Not ordering sills at the same time — costs 40–60% more when ordered separately later
• Ignoring glass type — glass is 70% of the window surface; always request Low-E with argon

Indicative prices — apartment window replacement 2026

> ⚠️ Note: All prices are indicative and subject to change. Always request an updated quote.

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Frequently Asked Questions

What are the signs that old windows need replacing?

The 7 clear signs are: condensation between the glass panes (damaged perimeter seal, unrepairable), draughts with windows closed, high winter energy bills, excessive street noise, difficulty opening/closing, yellowed or cracked profiles, and an ongoing general renovation.

How much of an apartment's heat loss comes from old windows?

Old windows can account for 30-40% of heat loss. An old window with Uw = 2.8 W/m²K versus a modern one with Uw = 1.0 W/m²K means almost 3 times more heat lost. Replacement directly reduces the winter heating bill.

Can condensation between the glass panes be repaired?

No. Internal condensation, between the two glass panes, indicates a damaged perimeter seal of the insulated glass unit — the glass no longer insulates. This defect cannot be repaired, the glass must be replaced. By contrast, draughts can be temporarily remedied by adjusting the hardware.

When is the best time to replace windows?

The best time is alongside a general renovation, when the walls are stripped anyway. Old windows offer only 20-25 dB sound insulation, while a modern Salamander profile offers 38-47 dB, plus a significant reduction in heat loss.