Crystal uPVC French Door - Left Hand Master - 1190mm x 2055mm - White

It means that when you are standing outside and looking at the door, the primary opening door (the master door) is on the left side. The door on the right is the slave door that opens after the master.

The U-value measures how well a door insulates. A lower U-value, like 1.2 W/m²K for this door, indicates better insulation, meaning less heat escapes from your home, leading to potential energy savings.

The package includes the complete door unit: frame, clear triple-glazed glass, handle, the five-point Yale locking mechanism, and a 150mm cill.

Use a soft cloth dampened with water and a mild, non-abrasive detergent. Rinse with clean water and dry with a soft cloth. Avoid harsh chemicals or abrasive pads.

The door unit, including the frame, glass, and hardware, is supplied assembled for installation. Professional installation is recommended.

The product comes with a 10-year manufacturer's warranty, subject to terms and conditions.

While technically possible, professional installation is strongly advised to ensure correct fitting, sealing, security, and to comply with warranty requirements.

Check for obstructions around the frame and ensure the locking mechanism is fully disengaged. The door may require minor adjustment by a professional installer if the frame has settled.

Some condensation between the panes indicates a seal failure and the unit may need replacement. Condensation on the *inside* or *outside* surface is normal and depends on temperature and humidity, especially if trickle vents are closed.

Ensure the door is fully closed and aligned within the frame. Clean and lubricate the lock mechanism with a suitable lubricant. If the issue persists, contact the manufacturer or a locksmith.

Check the weather seals around the door frame for damage or misalignment. Ensure the door is properly closed and locked. Adjustments to the door or seals may be necessary, potentially requiring professional assistance.