How much does shotcrete cost for a pool?

What does shotcrete cost per cubic metre for a pool?

Two published Australian material prices, read on 8 October 2026:

• A Melbourne concrete supplier lists a 40MPa 7mm shotcrete mix, described as ‘typically used in underground applications or swimming pools’, at $300 per metre, with a 1.5 metre minimum shown as $450. In the concrete trade a ‘metre’ is a cubic metre. The page does not say whether GST is included.
• A concrete marketplace’s guide, updated August 2026, puts 40 MPa ready-mix at $390–$440 per m³ delivered. Its table says the bands include GST and its FAQ describes Sydney bands as ex GST, so treat the GST position as unclear. It also says suppliers charge minimum cartage on loads under 4 m³.

Those are prices for the concrete. A pool shell is sprayed by a crew with a pump or gun, a compressor and a nozzleman, over steel that has already been fixed and inspected. We found no Australian business that publishes a supply-and-spray rate per cubic metre for a pool; the shotcrete stage is quoted inside the shell price. US cost sites publish shotcrete prices, but in US dollars for US labour, so we have not converted them.

The quotable version: the concrete in a pool shell costs a few hundred dollars a cubic metre; what you pay for at the shotcrete stage is mostly the crew, the rig and the steel behind it.

How much shotcrete does a pool need? The shell-volume calculation

Work it out from the surface, not the water. For an 8m × 4m pool averaging 1.4m deep:

1. Floor: 8 × 4 = 32 m². Walls: 24m of perimeter × 1.4m = 33.6 m². Total 65.6 m².
2. Thickness. An Australian pool engineer’s guide gives AS 2783 cover of 40mm on the soil face and 30mm on the water face, with N12 bars the most common size in two layers. Cover plus four 12mm bar thicknesses is already 118mm before any gap between layers, which is why we use 150mm and 200mm as the two cases. Your engineer’s drawing sets the real figure.
3. In place: 65.6 × 0.15 = 9.8 m³; 65.6 × 0.20 = 13.1 m³.
4. Rebound. The American Shotcrete Association says rebound ‘may be estimated as 5 to 15%’ of the material. Dividing by 0.95 and 0.85 gives 10.4–11.6 m³ and 13.8–15.4 m³ ordered.
5. Material: 10.4 m³ × $300 = $3,107 at the bottom; 15.4 m³ × $440 = $6,792 at the top.

Steps, a bench, a bond beam and a spa add volume this sum leaves out. A flat-bottomed pool with a deep end differs too. Substitute your own floor area, wall area and the thickness on your drawing.

The quotable version: an 8m × 4m concrete pool takes roughly 10–15 cubic metres of shotcrete, and the concrete itself costs about $3,100–$6,800.

Why the shell stage costs far more than the concrete

A national cost guide verified in October 2026 prices a concrete pool’s installed base package at $1,800–$2,300 per m² of water area for a pool of about 8m × 4m, or $57,600–$73,600. The concrete in the table above is about 4–12% of that. One lead-generation guide’s worked Sydney example carries a ‘concrete structure (shotcrete)’ line of $38,000 for the same size; the concrete is roughly 8–18% of that estimate.

The rest of the structure line is what the money buys:

• Steel. The engineer’s guide puts the most common residential schedule at N12 bars at 150mm centres both ways, both faces. AS 2783 limits cracks to 0.2mm, which is what drives that much steel.
• The crew and rig. Pump or gun, compressor, nozzleman and finishers on site for the shoot.
• Engineering and inspection, because once shotcrete goes on nobody can see the steel again.

The stages, deposit limits and what is outside the shell price are set out in what a concrete swimming pool costs, stage by stage; this page does not repeat them. The dig before the shoot is in what pool excavation costs.

The quotable version: a pool’s shotcrete stage is priced as structure, not as concrete, because the concrete is roughly a tenth of it.

Is my pool shotcrete or gunite, and does it change the quote?

Both are sprayed concrete. The American Shotcrete Association calls gunite dry-mix shotcrete: the water is added at the nozzle. In wet-mix, ready-mixed concrete arrives in a truck and is pumped to the nozzle. An Australian pool engineer’s guide says shotcrete is the most common method for residential pools here.

So the method changes the crew hours and the waste, not what the finished shell must achieve. The ASA’s position is that a pool shell should be monolithic, with no cold joints. What to ask every quote:

1. Wet-mix or dry-mix, and what strength is specified?
2. What shell thickness is on the engineer’s drawing, and how many cubic metres are allowed?
3. Is a steel inspection booked before the shoot, and is the shell shot in one day?

Then compare pool quotes from concrete pool builders in Sydney, Melbourne, Brisbane or Perth with the same three answers on each.

The quotable version: gunite is dry-mix shotcrete; the method changes how long the crew takes, not the strength the shell must reach.

Common questions

Sources

• Concrete supplier’s product page, 40MPa 7mm shotcrete for swimming pools: $300 per metre, 1.5m minimum shown as $450 (supplier-published, Melbourne; GST treatment not stated; read 8 October 2026)
• Concrete marketplace price guide, updated August 2026: 40 MPa $390–$440 per m³ delivered; minimum cartage below 4 m³ (vendor-published; the page labels its bands both incl. and ex GST)
• American Shotcrete Association: efficiency of dry-mix shotcrete (rebound 5 to 15%, average 10%; dry-mix about one quarter the production rate of wet-mix)
• American Shotcrete Association: pool FAQs (dry-mix shotcrete, gunite, minimum 28 MPa)
• American Shotcrete Association Pool Position Statement #1: compressive strength of pool shotcrete, 4000 psi (27.6 MPa) minimum
• American Shotcrete Association Pool Position Statement #5: monolithic shotcrete for swimming pools, no cold joints
• Australian pool structural engineer’s reinforcement guide: AS 2783 crack width 0.2mm, cover 40mm soil face and 30mm water face, N12 bars, shotcrete most common for residential pools
• National pool cost guide (lead-generation), verified October 2026: concrete base package $1,800–$2,300 per m² of water area; plunge $45,000–$62,000; concrete from $55,000
• Lead-generation pool cost guide: worked 8m × 4m Sydney concrete pool, ‘concrete structure (shotcrete) $38,000’ (estimate, read 8 October 2026)
• HomeAdvisor: shotcrete cost (United States, US dollars; pool 400–1,000 sq ft US$8,000–$25,000)

General information only, current at 2026-10-08. Pool rules differ by state and by council, and penalty amounts are updated regularly. Confirm your own obligations with your council or a registered inspector before acting.