Answers to questions about window warranties

Introduction

Window warranties are an important part of buying PVC windows. Knowing what is covered, the warranty periods for different components, and the correct procedure for claims will save time and money.

What a warranty typically covers

• Profile (frame and sashes): manufacturing defects such as cracks or delamination.
• Insulated glass units (IGUs): manufacturing defects and loss of hermetic seal (fogging between panes) not caused by external damage.
• Hardware: mechanical failures of handles, hinges, locks under normal use.
• Installation: defective installation work if performed by the contracted installer/manufacturer.

Note: Warranties protect against manufacturing and installation defects, not accidental damage, misuse, or extreme environmental effects.

Typical warranty periods

• PVC profile: 5–10 years (varies by manufacturer).
• IGU (double/triple glazing): 2–5 years for seal integrity; some manufacturers offer longer coverage for glass quality.
• Hardware: 2–7 years depending on the hardware brand.
• Installation: 1–5 years on installation work.

Always check the written warranty card and your contract for exact terms — they can vary by model and configuration.

Conditions that may void the warranty

• Unauthorized interventions: DIY disassembly, structural changes, or adding hardware without approval.
• Mechanical damage: impacts, scratches, broken glass.
• Improper use: using aggressive cleaning agents, prolonged exposure to moisture beyond recommended limits.
• Lack of maintenance: neglected lubrication, clogged drainage, or degraded seals.

How to register and keep your warranty valid

1. Keep the contract and stamped warranty card.
2. Inspect windows immediately after installation (operation of hardware, absence of visible defects).
3. Take photos before and after installation, especially if repairs are expected.
4. Perform periodic maintenance: lubricate moving parts, check seals and drainage.

What to do when you find a defect

Step 1 — Act quickly

Document the issue (photos, date, operating conditions). Early reporting simplifies validation of a manufacturing defect.

Step 2 — Contact the seller/installer

Contact the company that installed the windows. Provide copies of the contract and warranty card, describe the problem and attach photos.

Step 3 — Expert inspection

The company will arrange an engineer visit. If recognized as warranty-covered, they will repair or replace the item free of charge. If not, you should receive a written report.

Step 4 — If there is a dispute

• Request a written explanation and a technical report.
• Order an independent expert inspection.
• If necessary, protect your rights through legal channels with contract and expert conclusions.

Frequently asked questions (FAQ)

How long does a window warranty last?

It depends on the component: profile 5–10 years, IGU 2–5 years, hardware 2–7 years. Check your contract.

What if the IGU fogs up inside?

Fogging indicates a failed seal. Document it and file a warranty claim — the IGU may be replaced if the defect is covered.

Is the warranty transferable to a new owner?

Most warranties transfer with the property if you have the contract and warranty card, though some may require notifying the manufacturer.

Will adjusting the hardware myself void the warranty?

Unauthorized repairs or adjustments can void the warranty for affected components.

What does an installation warranty cover?

Installation defects such as misaligned sashes or poor sealing around the frame are typically covered if performed by the contracted installer.

Practical tips to preserve the warranty

• Inspect and test windows during acceptance: opening, closing, locks, and visual defects.
• Perform annual maintenance: clean drainage channels, lubricate hardware, check seals.
• Use recommended cleaning products and lubricants.
• Keep all documents and receipts.

Conclusion

Correct document management and timely checks at installation are essential to protect your warranty rights. If you have questions, contact DK-Logi support — we help verify warranty terms and provide guidance for claims.