No-dig pipe relining
across Prospect

A resin-soaked liner is drawn through the existing drain, inflated so it presses against the pipe wall along the whole length, then cured until it hardens. The result is a continuous pipe formed inside the old one with no joints along the lined section. On ground that moves, the joints are what fail, so removing all of them at once is the entire repair rather than a partial one. The old pipe stays put and becomes the mould.

Because of what is under the yard. Prospect sits over Sydney's largest body of igneous rock, and dolerite is quarried for road base precisely because it is hard. So the cost of any excavation depends on how far down the workable material goes, and that is genuinely variable across a single property. A liner is installed through existing access points and never breaks ground, so what is underneath simply stops being a factor in the price.

Here, yes, and that is worth understanding. A relining price is set by the length of the run, its diameter and how many bends it has, all of which we can see on camera before quoting. An excavation price depends on ground conditions nobody has measured yet. One of those is a price and the other is an estimate, and on this ground the gap between them can be large.

Yes, and we will say so when it is. A section that has genuinely collapsed or been crushed cannot be lined, because a liner needs sound pipe to form against. A shallow repair close to the house in accessible ground can also be perfectly sensible. What we will not do is recommend an excavation without addressing what happens if rock is met earlier than hoped.

The clay above the rock. Dolerite weathers to a heavy clay that shrinks when dry and swells when wet, and that movement works old joints apart a fraction at a time over decades. Once one has opened, roots find it and soil washes in. It is the reason so many lines here block on a cycle rather than once.

Usually. What rules it out is a section that has collapsed or been crushed, or one so far gone there is nothing left to press against. A camera settles it before anyone quotes and the footage is handed over either way. If lining will not work we say so rather than selling one that fails.

A sectional patch over one failed joint is about $900 to $2,200. A full run to the boundary is usually $3,500 to $7,000, priced on length, diameter and bends. A camera inspection is $250 to $450 and comes off the reline if you proceed. We price excavation alongside, with the rock question stated rather than left out of it.