50mm & 25mm Kiln-Dried Basswood Venetian Blind Stack Height & Pelmet Depth Specification
Engineering stack height table, pelmet recess depth, slat weight (g/m²), Somfy motor torque sizing, and wet-zone Polymer (Faux-Wood) specification for 50mm & 25mm Basswood Venetian blinds.
- ✓17 cm stack height at 150 cm drop; 25 cm stack height at 250 cm drop (including headrail)
- ✓Minimum 10–12 cm ceiling pocket / pelmet depth & casement window clearance calculation
- ✓100% Waterproof Polymer (Faux-Wood) mandatory rule for bathrooms and kitchen sinks
Table 1 — 50mm & 25mm Natural Kiln-Dried Wood (White, Walnut, Mahogany, Oak, Grey, Black), Moisture-Resistant Polymer & Aluminum Venetian Blind Capacity & Stack Height Specification
| Venetian Blind System & Material | Slat Width / Thickness | Max Width | Max Area (Manual / Motorized) | Stack Height @ 150cm Drop | Stack Height @ 250cm Drop | Ladder Tape / Wire Guide & Wet-Zone Rule |
|---|---|---|---|---|---|---|
| Natural 50mm Wood Venetian blind (White, Walnut, Mahogany, Oak, Grey, Black) | 50 mm / 3.0–3.2 mm | 240 cm (Custom: 270 cm) | 4.8 m² (Motorized: 6.0 m²) | 17 cm (incl. headrail) | 25 cm (incl. headrail) | 25mm woven ladder tape or cord • Optional steel side-guide cable • Dry indoor spaces (Living Room / Office) |
| Natural Kiln-Dried Wood (White, Walnut, Mahogany, Oak, Grey, Black) Slim Venetian | 25 mm / 2.6 mm | 240 cm | 3.5 m² | 19 cm | 28 cm | Cord ladder • Ideal for shallow window recesses and sash-mounted installations |
| 100% Waterproof & Steam-Resistant Polymer (Faux-Wood / PVC Composite) | 50 mm / 3.2 mm | 240 cm | 4.5 m² (High density: ~2.6 kg/m²) | 19 cm | 29 cm | 100% waterproof, zero warping/swelling • Mandatory specification over kitchen sinks, bathrooms & conservatories |
| Micro & Standard Baked-Enamel Aluminum Venetian (6063 Alloy) | 16 mm / 25 mm (0.21 mm gauge) | 300 cm | 6.0 m² | 7 cm | 10 cm | Cord ladder & steel hold-down wire guide • Office glass partitions and double-glazing units |
| Perforated (Micro-Mesh) / Wood-Grain VIP Aluminum Venetian | 50 mm (0.23 mm gauge) | 300 cm | 7.5 m² | 11 cm | 16 cm | 25mm fabric tape or cord • Wide commercial facades and industrial loft interiors |
📐 50mm Wood Venetian Stack Height & Motor Weight Formula
Stack Height Formula: H_stack (cm) ≈ 5.5 cm (Headrail + Bottom Rail) + [Drop Height (cm) × 0.078].
Mass & Motor Torque: Kiln-dried Basswood weighs 2.2 – 2.6 kg/m². Blinds exceeding 3.5 m² require a 6 Nm – 10 Nm Somfy Tilt & Lift tubular motor.
📸 2K Architectural Application & Material Detail Visuals
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❓ Frequently Asked Engineering & Tender Questions
❓ What is the stack height of a 50mm natural Basswood Venetian blind when fully raised?
Including the 5.2 cm steel headrail and bottom rail, a 50mm Basswood Venetian blind stacks to 13 cm at 100 cm drop, 17 cm at 150 cm drop, 21 cm at 200 cm drop, 25 cm at 250 cm drop, and 29 cm at 300 cm drop.
❓ How much ceiling clearance is needed so inward-opening windows do not hit the blind stack?
Mount the headrail high enough above the window lintel to accommodate the full stack height plus 2 cm clearance (e.g., 23 cm above the sash for a 200 cm drop blind).
❓ Can natural wood Venetian blinds be installed in bathrooms or above kitchen sinks?
No. High humidity and direct water splashes cause natural timber slats to warp. Always specify 100% waterproof 50mm Polymer (Faux-Wood) or Aluminum Venetian blinds in wet zones.