Frequently asked questions about window fittings

Frequently asked questions about window fittings

Window fittings (hardware) are the invisible mechanics of a window: hinges, handles, locks, limiters and tilt-and-turn mechanisms. Their quality, installation and maintenance determine the convenience of use, airtightness and safety. Below are answers to common questions DK-Logi customers ask when buying and servicing PVC windows and blinds.

1. What types of fittings exist?

• Tilt-and-turn — versatile, allows both full opening and tilt ventilation.
• Hinged (turn) fittings — typical for doors and large sashes.
• Sliding and roller systems for sliding/folding units.
• Closers, opening limiters, child locks and anti-rotation devices for handles.

Each type is designed for certain loads and usage patterns. Consider the weight of the glazing unit and frequency of use when choosing.

2. How often should hardware be serviced?

We recommend basic maintenance 1–2 times a year:

• lubricate moving parts with a silicone-based lubricant;
• check and tighten screws and inspect seals;
• clean from dust and debris.

In heavy-use situations (frequent operation, coastal salt air) shorten intervals to 3–6 months.

3. The handle turns but the window won’t close — what to do?

This can indicate worn locking cams or misaligned fittings:

• Check for visible damage or a broken keep (strike plate).
• Try tightening the handle screws (usually under a cover cap).
• If the issue persists — adjustment or part replacement is needed. Contact service to avoid damaging the seal.

4. Can I replace a handle or gasket myself?

• Handle replacement is usually straightforward: remove the cover, unscrew, and fit a compatible new handle.
• Replacing seals requires correct profile selection and careful installation. If unsure, hire professionals to avoid air or water leakage.

5. How to adjust the sash compression?

Adjustment is made via cams or adjustment screws on hinges and strike plates:

• Turn cams clockwise to increase compression;
• Turn counterclockwise to reduce it.

This work requires experience: excessive compression can deform the profile and accelerate wear.

6. What is micro-ventilation and is it safe?

Micro-ventilation (tilt position ventilation) provides continuous air exchange and reduces condensation risk. Modern systems use limiters to prevent unauthorized opening — practical and secure.

7. How to extend the life of fittings?

• Lubricate moving parts regularly;
• Adjust compression timely;
• Avoid rough handling (do not force the handle or hold the sash by the glass);
• Use quality fasteners and follow manufacturer’s installation guidelines.

8. Warranty and replacement — key points

Warranty terms depend on the manufacturer and installation conditions. Hardware usually carries a 2–5 year warranty. Incorrect installation or unauthorized repairs may void warranty.

FAQ section

• Q: Why do chips appear near the handle on PVC?
  A: Often caused by impacts or misuse. Use careful handling and protective pads in high-contact areas.

• Q: Can a child lock be installed after window purchase?
  A: Yes, most locks can be retrofitted — contact DK-Logi service for selection and installation.

• Q: How to tell if hardware needs replacement rather than adjustment?
  A: If operation remains poor after adjustment and lubrication, or there is corrosion or visible wear, replacement is needed.

• Q: What lubricant should I use?
  A: Silicone-based lubricants or specialized window hardware greases. Avoid light oils that attract dust.

Pro tip: if you notice any unusual behavior, take a photo and send it to service — often a photo is enough to determine the cause and select parts.

Conclusion

Good-quality fittings and regular maintenance ensure long-lasting, safe window operation. If you are unsure about diagnosis or replacement, contact DK-Logi authorized service: we will help select the right hardware, perform precise adjustments and provide warranty support.