Home & Construction4 min read
Trench Excavation Volume and Spoil to Remove
A 30 m trench, 0.7 m wide and 1.2 m deep, removes 25.2 m³ of soil in place, and nearer 31.5 m³ once it is dug up and loose. Plan skips and trips.
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26 articles
- Home & Construction4 min read
Fence Post Count: Spacing and Corner Rules
A 38 m fence at a 3 m maximum spacing needs 14 posts, not 13: round the spans up, then add one. See the closed-loop, corner and gate adjustments.
- Home & Construction5 min read
How Many Tiles Do You Need? Area, Wastage, Boxes
A 24 m² floor with 0.6 m × 0.6 m tiles needs 74 pieces once you add 10% for cuts and breakage. See the maths, box rounding and layout wastage.
- Home & Construction5 min read
How Much Mulch Do I Need? Bed Volume and Depth
Mulch needed = bed area × layer depth. A 24 m² bed mulched 5 cm deep takes 1.2 m³, or 24 bags of 50 litres. Add about 10 % for settling and uneven ground.
- Home & Construction4 min read
Heat Loss Through a Wall: U × A × ΔT
A 30 m² wall with a U-value of 0.4 W/m²K loses 180 W when the indoor-outdoor difference is 15 °C. Halve the U-value and the loss halves too.
- Home & Construction4 min read
Hectare Conversion: Square Metres to Hectares and Acres
One hectare is 10,000 m². Divide the area in square metres by 10,000: 35,000 m² is 3.5 ha, which is about 8.65 acres. Includes acre-to-hectare steps.
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