Frequently asked questions about window warranty periods

Frequently asked questions about window warranty periods

Buying PVC windows is an important investment in home comfort and energy efficiency. One of the key decision factors is the warranty period — it protects you from manufacturing defects and can save on repair costs during the initial years.

Typical warranty lengths for windows

• PVC profiles: commonly 5–10 years depending on the brand.
• Hardware (locks, hinges): usually 2–7 years depending on the component and brand.
• Insulating glass units (IGUs): typically 5–10 years for hermeticity (no internal fogging).
• Seals and gaskets: 1–5 years since rubber ages faster.

Warranty lengths vary by manufacturer and product line. Always check the contract and product certificate.

What does the warranty usually cover?

The warranty generally covers:

• manufacturing defects in profile and IGUs;
• loss of hermeticity of the glass unit leading to condensation between panes under normal use;
• hardware failure caused by material or production defects;
• significant deformation of sashes due to production faults.

Note: warranty applies only if installation and operation comply with manufacturer instructions.

When does the warranty start and end?

• Warranties commonly start from the date of installation or delivery, as specified in the contract. Most often it is the date of installation confirmed by a handover act.
• Keep all documents: contract, invoices, handover acts — you'll need them to file a claim.

What is usually excluded from warranty coverage?

• Damage caused by improper installation if not performed by certified installers.
• Mechanical damage from external factors (impacts, vandalism).
• Misuse, unauthorized adjustments, or use of aggressive cleaning agents not recommended by the manufacturer.
• Normal wear and tear: seal degradation, minor scratches or color changes due to weather (if stated as exclusions).

How to file a warranty claim correctly

1. Contact the seller or service department as soon as possible.
2. Prepare contract, handover act, receipts and photos of the defect.
3. Wait for a technician inspection — typically within 7–30 days.
4. After inspection, the company will either repair/replace free of charge or provide a written refusal with reasons.

Tip: keep written records of all communication and retain original documents.

Practical tips to extend service life and avoid warranty disputes

• Use certified installers — many warranties require professional installation.
• Follow care instructions: use mild cleaners, maintain seals, and periodically lubricate hardware.
• Avoid DIY modifications and aggressive chemicals on seals or laminated surfaces.
• Seasonal checks and small adjustments are cheap preventive measures.

FAQ — short answers to common questions

1. Can I extend the warranty?

Some manufacturers or suppliers offer extended warranty packages for an additional fee. Ask your seller for options.

2. What if the service refuses my warranty claim?

Request a written refusal with explanation. If needed, consult consumer protection authorities or an independent expert.

3. Does warranty cover broken IGU due to vibrations?

If the cause is a manufacturing defect — usually yes. If caused by external mechanical impact — no.

4. Can I demand a full window replacement under warranty?

Generally warranties provide repair or replacement of defective parts. Full replacement is possible only in case of a serious manufacturing defect.

5. What is considered normal wear?

Natural aging of seals, minor scratches, and gradual color changes due to weather are typically not covered.

6. Is a handover act required for a warranty repair?

Yes. A document confirming installation and handover is a primary proof when filing a claim.

If you have further questions, contact our sales or service team — we will review your documents and advise on the next steps.