Root damage to sewer lines leads to clogged, overflowing, and slow-flowing drains, sometimes accompanied by a gurgling noise from the toilet. If a problem occurs in your property sewer it is your responsibility to have it fixed. To see which sewer lines are your responsibility see the diagram in the section “How to Cut Sewer Overflow”.

Root damage can also let stormwater into the pipes. During heavy rain, this extra water can overload the sewerage system causing it to overflow into our waterways and pollute the environment.

Avoiding damage to your sewer

Points to consider when planting trees:

• Plant gardens and trees away from sewer lines
• Avoid planting species which are likely to cause problems (see below)
• Consult your local nursery or gardening guide to find out how large a tree or shrub will grow. A tree’s roots will generally extend about one and a half times the distance of the adult plants branches.
• Depending on the age of your home Council may have a plan of your property’s sewerage pipes. Contact Shoalhaven City Council’s Development Services on 4429 3211 to find out more.

Problem species are listed at the bottom of this page. You should avoid planting these species.

Fixing the damage

If your house sewerage pipes have been blocked by roots you will need to get a licensed plumber to clear them. As well as removing the roots you should consider fixing the damage in a way which will minimise future problems.

• Contact a plumber who will estimate where the blockage is located
• Your plumber can recommend the best solution for your particular problem.

If you stop plant roots from re-entering your sewer lines you will save yourself the expense of having to keep on clearing them and you will also protect the environment by keeping stormwater out of the sewer.

Some plants to avoid

The following is a guide only. It is advisable to talk with your local nursery or arborist if you have any concerns about particular species.