How Long Do PVC Windows Last? Signs They Need Replacing + Real Lifespan

How Long Do PVC Windows Last Under Normal Conditions?

Modern PVC windows, with certified profiles and professional installation, have a lifespan of 30–50 years under normal use. Hardware (hinges, locks, handles) typically needs replacement after 15–20 years, but the profile and glass remain functional much longer.

Lifespans guaranteed by Neofort BIZ:

• Salamander bluEvolution PVC profiles: 5-year warranty, estimated 40–50 years lifespan
• Triple argon thermal insulating glass: 5-year seal warranty, estimated 30–40 years
• Roto/Winkhaus hardware: 2-year warranty, estimated 15–25 years (with maintenance)

7 Clear Signs Your PVC Windows Need Replacing

1. Permanent condensation between glass panes

Condensation between the panes (not on the interior glass surface) means the insulating glass unit seal has failed. The argon has escaped and the glass no longer insulates. Cannot be repaired — replacement mandatory.

2. Draughts or water infiltration

If you feel draught around a closed window, gaskets are worn. Water on the interior sill after rain means the perimeter seal has failed.

3. Difficulty opening or closing

Windows that jam, don't close properly or have a stiff handle have worn hardware or a deformed frame. If hardware adjustment doesn't help, replacement is needed.

4. Yellowed, brittle or cracked profiles

Old profiles (pre-2000) with lead-based stabilisers yellow and become brittle. Cracks in corners or on the profile surface indicate irreversible material degradation.

5. Significantly increased heating costs

A 20–30% unexplained increase in energy bills may indicate degraded window thermal performance. Test: hold your hand 10 cm from the window in winter — if you feel intense cold radiation, the glass no longer insulates.

6. Increased outside noise

If street noise levels haven't changed but you hear them louder, acoustic gaskets have worn. Modern triple glazing with Rw = 34–36 dB cuts ~40% of perceived noise vs old double.

7. Hard, cracked or missing gasket sections

EPDM gaskets harden after 10–15 years. Once hard, they no longer seal.

Repair or Replace? The Right Calculation

When repair is worthwhile:

• Worn hardware on otherwise sound windows → replace hardware only (€40–80/window)
• Worn gaskets → replace gaskets (€10–20/window)
• Broken glass or fogging → replace glazing unit only (€80–160)

When full replacement is more cost-effective:

• Yellowed or cracked profiles → cannot be repaired
• Old double glazed windows (pre-2010) → triple glazing reduces bills by 35–50%
• Uw > 1.5 W/(m²K) → replacement with triple pays back in 8–12 years

How to Extend PVC Window Lifespan

Mandatory maintenance twice a year (spring and autumn):

• Lubricate all hardware mechanisms with silicone oil (not WD-40)
• Check and adjust the 3-point hardware setting
• Clean gaskets with water and soap, apply silicone spray
• Check perimeter seal — if you feel draught, call service

FAQ — PVC Window Lifespan

How long do Salamander PVC windows last?

Salamander PVC profiles have an estimated 40–50 year lifespan under normal conditions. Commercial warranty from Neofort BIZ is 5 years. Hardware needs replacement or service after 15–20 years.

Can just the glass be replaced without changing the frame?

Yes, if the frame/profile is in good condition. A new glazing unit costs €80–160 vs €300–400 for the complete window. The technician checks whether the frame rebate allows a thicker unit (e.g. triple instead of double).

When should PVC window gaskets be replaced?

EPDM gaskets should be replaced at 10–15 years. Signs: feel cracked to the touch, no longer spring back, or draught with window closed.

Related: Window Thermal Coefficient Guide 2026 · Triple vs Double Glazing Savings

Neofort BIZ installs Salamander PVC windows with 5-year warranty and service in Bucharest and Ilfov. Request quote or service.