How to take care of PVC windows so they last 30+ years

Modern PVC Windows are not just frames with glass. They are complex systems: premium profiles, thick energy-saving double glazing with Low-E coating and argon, reliable hardware. They can last for decades, but even the highest quality constructions require regular maintenance.

Window care is not a complicated ritual, but rather a few simple habits that can truly extend their lifespan. Every time you open the sash, you notice signs of its functionality: smooth operation, tight sealing, and clean glass. These little details define comfort in the home for many years.

Cleaning the Profile

PVC is durable, but aggressive agents and abrasives can damage it. Warm water, a soft sponge or microfiber cloth, and occasionally a special PVC cleaner are sufficient.

Avoid powders, acetone, and bleach - they quickly ruin the profile, making it yellow and brittle.

Light maintenance ensures that the frame looks like new and enhances the overall feeling of comfort in the room.

Care for the Double Glazing

Modern double glazing with a thickness of 48–72 mm, Low-E coating, and argon is very reliable but requires delicate care.

• Use regular glass cleaners or water with vinegar.
• Do not wash in direct sunlight to avoid streaks.
• Use a rubber squeegee or microfiber cloth.
• Abrasive agents or metal scrapers damage the surface and coating.

Clean glass allows more light, retains heat better, and makes the space more pleasant to live in.

Water Drainage Channels

Small holes at the bottom of the window drain condensate and rainwater. Clogged channels with dust or debris can lead to water accumulation inside, which is harmful to the frame. It's enough to wipe them with a cotton swab or rinse with water once a season.

A small detail, but it truly saves the structure for decades.

Rubber Seals

The seals are responsible for tightness, warmth, and silence. Ignoring them can lead to drafts and noise.

• Once every 6–12 months, wipe the seals with a damp sponge.
• Treat with silicone or glycerin lubricant to prevent the rubber from drying out.

This simple operation preserves the elasticity of the parts and extends their lifespan by decades.

Hardware

Quality hinges and scissors last a long time, but without lubrication, they squeak and start to stick.

• Once a year, apply machine oil or silicone lubricant to moving parts.
• Check the sash operation - it should be smooth and easy.
• If the sash is misaligned or sticking, consult a specialist. Light adjustments: tighten the pressure, switch the eccentric to winter mode, and adjust the lower hinge with an Allen key.

PVC Painting

Profiles are usually already colored and laminated, so painting is typically not necessary. If changing the color:

• Use special paints for PVC.
• Prepare the surface (matte sandpaper + adhesive primer).
• Apply 2–3 layers of paint with a roller or spray gun.

Improper painting can shorten the profile's lifespan, so factory lamination is the most reliable option.

Technical Parameters of Modern PVC Systems

• Mounting depth: 76–80 mm
• Number of chambers: 6–7
• Maximum thickness of the glazing unit: up to 72 mm
• Uf of the profile: 0.81–0.97 W/m²K
• Sound insulation: 46–48 dB
• Safety class: RC2–RC3
• Sealing: 2–3 contours

These parameters are important not only for energy efficiency but also for the durability of the structure.

How often should you wash the profile and glass?

Once a season. Warm water and a soft sponge are sufficient.

Can you use kitchen chemicals?

No, aggressive agents destroy the surface.

How often should you lubricate the hardware?

Once a year, to ensure the sash operates smoothly.

The seals have dried out - what to do?

Wipe and treat with silicone grease. If they are severely damaged - replace them.

Can profiles be painted?

Yes, but factory lamination is better - without the risk of reducing the lifespan.

When should you call a master?

Misalignment of the sash, drafts, jamming of hardware, or fogging of the double-glazed unit.

Is maintenance needed even for premium systems?

Yes, regular cleaning, adjustment, and lubrication of hardware extend the lifespan of any modern PVC windows.