النوافذ المنزلقة

In home and building construction, a نافذة منزلقة is a type of operable window characterized by one or more sashes (movable frames holding the glass) that open horizontally by sliding along tracks installed at the top and bottom of the frame. Unlike a double‐hung window (which has two vertically stacked sashes that move up and down), a sliding window is essentially “turned on its side”—so its sashes run left and right.

a. Basic Structure and Configurations

1. Two-Panel (Two-Lite) Sliding Window:

   • One panel is fixed in place (non‐movable), and the other panel slides horizontally to open.

   • The operable sash can slide either to the left or to the right, depending on installation.

2. Three-Panel (Three-Lite) Sliding Window:

   • Usually features three glass panels within a single frame.

   • The center panel is often fixed, while both outer sashes slide inward toward the center.

   • Alternatively, configurations may vary (e.g., two operable sashes sliding past a fixed center or other custom arrangements).

Sliding windows are typically wider than they are tall, making them well‐suited for wide openings (such as panoramic views of a landscape or overlooking a patio). They often come with optional insect screens and can be ordered with your choice of which sash is operable.

b. Operation and Maintenance

• How to Open/Close:

  1. Unlock the window sash’s locking mechanism (often a latch or hook lock).

  2. Slide one sash horizontally along the track to either the left or right until the window is open.

  3. Push the sash(s) back to their fully closed position and re‐lock to secure.

• Cleaning:

  • To clean both sides of the window glass, you must remove the movable sash from its track.

  • While sliding windows do not tilt in (unlike some double-hung or casement windows), sash removal is generally straightforward: lift the sash up and pivot one side out, or lift straight up and out, depending on the manufacturer’s design.

  • After cleaning, reinstall the sash by reversing the removal steps.

c. Pros and Cons

• Pros:

  1. Ease of Operation: A single gentle push opens or closes the window—ideal for hard-to-reach areas (e.g., above a kitchen sink).

  2. صيانة منخفضة: Fewer mechanical parts (no pulleys or springs) mean less can go wrong over time.

  3. المتانة: Straightforward track mechanisms tend to last longer without sagging or sticking.

  4. Unobstructed View: Because there are no muntins or meeting stiles down the center (in some models), you get a broad, clear glass area, allowing maximum natural light.

• Cons:

  1. Cleaning Challenges: Removing sashes to clean the exterior glass is a bit more involved than tilt-in windows, which fold inward for easy access.

  2. Partial Opening: In a two-panel sliding window, only one side can open at a time, whereas in double-hung windows both sashes can open.

  3. Potential Water Build-Up: Without adequate drainage channels in the sill, water can collect and possibly cause issues. It’s important to select sliding windows designed with proper weep holes or drainage paths to prevent moisture problems.