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How Can We Stop Running Out of Sub-Base or Slabs Halfway Through a Patio Job?

Landscapers lose days to short or wrong material orders for paving, sub-base and walling. We build a takeoff that turns each priced job into an accurate order.

Updated 3 min readBy SpiderHunts Technologies

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Quick answer — TL;DR

Materials go wrong on landscaping jobs because the order is worked out again by hand, often by someone who did not price the job, from a quote that never listed the quantities. We build a materials takeoff that calculates slabs, sub-base, bedding, jointing, edging and walling from the job's line items, applies your own waste allowances, and produces a merchant order and a delivery plan tied to the job start date.

Day three, and the MOT has run out

The crew has dug out, laid the membrane and started compacting the sub-base when it becomes clear there is not enough Type 1 on the drive. Someone rings the merchant. The next grab lorry is Thursday. Meanwhile the sandstone arrived as the wrong calibrated thickness, and there are forty slabs more than the patio needs sitting on pallets the customer wants off their lawn.

Most landscaping businesses know this day well. The quote was priced properly, but the order was put together on the morning of the delivery by someone looking at the drawing and doing the sums in their head.

Why the order and the quote disagree

The price and the order are usually worked out separately. The quote holds a total for the patio. The order needs tonnes of sub-base at a given depth, bags of cement, jointing compound by coverage, the number of slabs in each size for a random pattern, and edge restraints. None of that was written down when the job was sold.

  • Quotes hold prices per element, not the quantities behind them.
  • Waste allowances for cuts, breakages and random laying patterns are guessed each time.
  • Changes agreed with the customer after the quote never reach the order.
  • Deliveries are booked by phone, so nobody can see what is coming to which site on which day.
  • Leftover stock from the last job is not counted, so it gets bought again.

Where the money leaks

A short order costs crew days: people standing on site waiting for a lorry, or driving to a builders' merchant for bags in the van. An over order costs cash tied up in slabs that sit in the yard until they are written off, and return charges when the merchant will take them back at all. Wrong items cause both. Then there are the customer conversations about why the pallets are still on the lawn.

How we build the takeoff

  1. Each quoted element carries its dimensions and specification: patio area and depth of dig, sub-base depth, bedding type, paving product and size mix, edging, walling courses.
  2. A takeoff engine converts those into quantities using your own rules: compacted depth per tonne, bags per square metre of bedding, jointing coverage, and your waste percentage for each product type.
  3. When a variation is agreed on site, the element is updated and the takeoff recalculates, showing what extra needs to be ordered.
  4. The order is grouped by supplier, with product codes from your merchants, and sent by email or through a supplier portal if they offer one.
  5. Deliveries are placed on a calendar against the job start date and the order in which the crew will need them, so aggregates arrive before slabs.
  6. Returns and leftovers are logged against the yard stock list, which the next takeoff checks first.
ElementWhat the takeoff works out
PatioExcavation volume, sub-base tonnage, bedding, slabs by size, jointing
Paths and edgingLinear metres of edging, haunching, bedding
WallsBlocks or stone per course, coping, mortar
TurfRolls, topsoil depth and volume
FencingPosts, panels or boards, postcrete, gravel boards

The rules are yours. If your team always lays 150mm of sub-base on clay, or adds more waste for a random pattern than for a single size, that is what the takeoff uses.

A normal first morning on site

The order for next week's job is produced from the job itself, checked by the person who priced it, and sent days ahead. The crew leader sees on their phone what is being delivered and when. When the customer adds a step down to the lawn, the extra blocks and coping are ordered that afternoon instead of on the day the crew runs out. Over a season, you also get a record of how the actual materials used compared with the takeoff, which lets you tune your waste figures from evidence rather than feel.

Signs the ordering needs fixing

  • Crews regularly wait for a second delivery.
  • Your yard has pallets of slabs nobody can match to a job.
  • Orders are worked out on the day by whoever is free.
  • Variations agreed on site are ordered late or not at all.
  • You cannot say what materials are due at which site this week.

FAQ

Frequently asked questions

The questions readers ask us after this guide.

Still have a question?

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Ask about your project

Does it know how much sub-base a job needs?

It applies the depths, compaction factors and waste figures you give it. It does not decide the build-up for a site, which stays with the person who surveyed it.

Can it send orders directly to our merchant?

Where the merchant accepts orders by email or has an ordering portal or file format, yes. Otherwise it produces a clean order you send yourself.

What if we price in a spreadsheet?

That is common. We can work from your spreadsheet as the starting point and move the quantities into a proper takeoff without changing how you price.

What affects the cost?

The number of product types and suppliers, how varied your build-ups are, and whether it needs to connect to quoting, job or accounts software.

Will it handle natural stone with mixed sizes?

Yes, if you give it the pack mix or the size ratio you normally use. Random patterns are handled with your own allowance for cuts.

Keep reading

More on Problems We Solve

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