Merchant Takeoffs.
All in.
FAQ
Why are drainage quantities split by depth?
A metre of 150mm pipe at 0.8m deep and the same pipe at 2.5m deep are completely different costs — more excavation, shoring, machine time and spoil.
Do you measure excavation and backfilling, or just the pipe?
Both. Trench volumes, bedding, backfill and cart-away are quantified along with the pipework. The surplus spoil leftover at the end of the drainage scope as a result of backfilling of 'approved' fill and or hardfill/bedding can either be stockpiled and left on site, or carted away and disposed of.
Where does the drainage scope end and plumbing begin?
The plumbing scope connects into the drainage. The drainage is works below ground up to any stormwater upstands, under slab pipework upstands or external gully traps. Plumbing scope belongs within the building generally.
What drawings do you need for a drainage take off?
Hydraulic drawings with invert levels, plus the relevant specification if available. If invert or level information is missing or conflicts between sheets, it will be flagged before you price — cheaper to catch it now than in the ground.







