Excavation, land levels and site conditions are the biggest cause of price influxes.
In general, standard equipment for a pool dig is a 5-6 ton excavator and 10m3 trucks, requiring 4.0m of straight easy access for the trucks and 2.4m width for an excavator, plus a minimum height of 3.5m. Our standard dig allowance is $3000 for this equipment, which allows 5-6 hours of dig time. Most inner city properties do not have this much space available and can be quite challenging. Most require a Bobcat, and as the block sizes get smaller, the access gets narrower and smaller machines are needed. The minimum width required for the smallest excavator is 1.0m. Smaller machines take more time and therefore cost more money, and we factor this into our provisional dig allowances.
Our excavation is always a provisional sum. Our years of experience allow us to make educated decisions on what we feel is an appropriate amount depending on your access and site conditions. We offer you an open book on excavation, with all dockets available for your viewing. If the cost of the dig is under the allowance, then you will receive a credit towards your contract. Likewise, if the cost is over the provisional allowance, then you will receive a bill for the additional cost.
Level properties make easy conditions for digging a pool. There are exceptions, depending on the amount of room to manoeuvre the digger if there are structures close by, and whether the level site is on natural ground or if it’s been levelled and is actually on fill. Filled sites may require additional engineering such as extra steel or piers to support the pool into natural ground.
Sloping blocks are very common and there are two ways to deal with this scenario. Cut into the block and build retaining walls, or construct the pool out of ground. There are costs for both and the best way depends on the relationship between the pool and the house. The amount of slope to the block has a huge influence on the cost. The more work that needs to be done, the greater the price. Sloping blocks shouldn’t be considered a negative though. With the right landscaping, they are often the pools and properties that have the wow factor.
The soil conditions can also affect the price as mentioned earlier. Filled sites might require more engineering. Reactive soils may need additional steel. Rocky sites might need extra equipment such as rock breakers or just need more time. Some of these factors can be assessed with soil tests but cannot always be accurately determined until the excavation is under way. We assess each job individually to make sure that the best and most cost effective outcome is reached in consultation with you.