Flooring
Account for carpet roll width and variable levelling depth
Two common floor estimates need more than a square-metre total.
Some materials cannot be ordered accurately from net floor area alone. Carpet comes in specific roll widths, while levelling compound depends on the amount of build-up across the floor. Treat each as its own takeoff.
Check carpet in the intended direction
An illustrative 3.2 × 4.5 m room is 14.4 m². If carpet is supplied 4 m wide and laid with the roll length along the 4.5 m side, the basic cut is 4 × 4.5 = 18 m² before trimming or pattern allowances. The unused strip is not automatically usable in another room because pile direction, seams and matching matter.
Measure floor levels
For a 20 m² area that varies linearly from 3 to 7 mm of required build-up, the average is 5 mm and the geometric fill is 0.1 m³, or 100 L. Irregular hollows should be measured as zones; averaging only two arbitrary readings can conceal deeper areas.
Convert using the selected product
A levelling product may state consumption per square metre per millimetre, or a bag yield at a stated thickness. Use that basis directly. Do not use the density of sand or concrete as a substitute for the product's yield.
Resolve the system before ordering
Substrate preparation, primer, permissible thickness, reinforcement and drying conditions remain product-specific. The takeoff calculates material only after those conditions have been selected and checked.
Found a measurement or calculation issue? Send the example and your correction.