Liquid Wallpaper (Silk Plaster) Coverage Calculator
Estimate the exact number of silk plaster bags required for your renovation. Calculates dry mix needs based on wall area, texture thickness, and application waste.
About
Renovating with liquid wallpaper or silk plaster requires precise material estimation to avoid color batch discrepancies. Unlike traditional rolls where you simply measure length, silk plaster consumption depends heavily on the applied thickness and the specific texture of the dry mix. Professional applicators know that running out of material mid-wall is a disaster because a new batch might not match the shade exactly.
This tool calculates the required dry mix weight by analyzing your total wall surface area and subtracting non-coated zones like windows or doors. It factors in a critical safety margin for amateur application errors or uneven walls which often consume more material than the manufacturer states. We incorporate standard water mixing ratios to help you prepare the correct consistency for troweling.
Formulas
The estimation logic first determines the net surface area to be coated by subtracting apertures from the gross wall dimensions.
We round the final bag count up to the nearest integer since partial bags are rarely sold. The margin accounts for material stuck in the bucket or uneven application thickness.
Reference Data
| Material Texture | Avg Coverage (per 1kg) | Water Ratio (L/bag) | Application Thickness |
|---|---|---|---|
| Fine Silk (Smooth) | 4.0 - 4.5 m2 | 6.0 L | 1.0 - 1.5 mm |
| Medium Relief | 3.5 - 4.0 m2 | 6.0 L | 1.5 - 2.0 mm |
| Coarse / Stone Effect | 3.0 - 3.5 m2 | 5.5 L | 2.0 - 2.5 mm |
| Cotton Base (Soft) | 3.5 - 4.5 m2 | 7.0 L | 1.5 mm |
| Cellulose Base (Budget) | 3.5 - 4.0 m2 | 6.0 L | 1.5 mm |
| Premium Glitter Mix | 3.0 - 3.5 m2 | 5.0 L | 2.0 mm |
| Outdoor/Facade Grade | 2.5 - 3.0 m2 | 5.0 L | 3.0 mm |
| Repair Margin (Pro) | Add 5% | N/A | Standard |
| Repair Margin (DIY) | Add 15% | N/A | Variable |