I. Basic Definition
Q: What is a window header line?
A: Also known as a window header line, it is a horizontal decorative line above the window, belonging to the exterior wall window casing component. It has a drip groove / eaves, serving both waterproof and decorative functions.
Q: What is the difference between window casing and windowsill trim?
A: Window header line (top): Window top, with drip, for water diversion and leak prevention.
Window casing (side): Sides of the window, for edge decoration and covering gaps.
Windowsill trim (bottom): Bottom of the window, sloped outwards for drainage.
II. Material and Specifications
Q: What is our material?
A: EPS: High cost-effectiveness, rich in shapes.
Q: Conventional dimensions?
A: Width: 12–20cm
Thickness: 8–15cm
Length: Custom, extending 15–30cm beyond the window width on each end
Custom sizes are also available.
III. Functional Role
Q: What is the core function?
A: 1. Waterproof and leak prevention: The drip groove cuts off the water flow, preventing rainwater from seeping into the window frame area along the wall.
2. Decorative beautification: Enhances the three-dimensional effect of the window, improves the grade of the building, and is suitable for European / New Chinese styles.
3. Wall protection: Covers the gaps between the window frame and the wall, preventing paint cracking and alkali efflorescence caused by sun and rain.
IV. Installation and Construction
Q: Installation key points?
A: 1. Base layer: The wall surface is flat and solid, without hollowing or cracks.
2. Fixing: Fix with expansion bolts + bonding mortar, leave a 3–5mm gap between joints, and seal with weather-resistant sealant.
3. Drip: The drip groove faces downwards, cut off 2–3cm from the window edge to ensure water drips vertically.
4. Slope: Outward slope **≥5%** to prevent water accumulation and backflow.
Q: Service life?
A: EPS: 8–15 years
V. Purchase and Design
Q: Purchase considerations?
A: The profile has a clear drip groove, and the structure is integrated without seams. The color is coordinated with the exterior wall, and custom stone-like / real stone paint effects are available.
Q: Design and matching suggestions?
A: 1. European style: Choose curved / richly detailed styles, paired with window casing of the same style.
2. New Chinese style: Choose simple straight lines + a small amount of carving, with a more subdued color tone.
3. Modern minimalist: Choose narrow flat styles, the same color as the wall or with a slight difference.