Recent content by Valeriu2

For a 3m × 2m slab at 100mm you're at 0.6m³, call it 0.65m³ with 5–10% for uneven ground. At 1:5 cement:ballast that's about 9 bags of cement and roughly 1.4 bulk bags of ballast, so one 850kg bulk bag won't quite do it on its own; you'd need a second bag or a few 25kg bags to top up. Under it...

For a quick sanity check: outside London, single-storey build costs in 2026 are running at roughly £1,800–£2,800 per m² for a standard finish, with the shell alone at about £1,200–£1,700 per m². A full-width extension on a typical semi is about 6m × 4m = 24m², so the build-only range is roughly...