Old pipes cause tree root invasion, says GUST

The Grow Urban Shade Trees group has claimed that old pipes are usually the cause of tree root invasion, rather than the trees themselves.

"Trees often get a bad rap when it comes to broken pipes and, frustratingly, precious trees are needlessly removed," said group member Ms Jenny Wilder.

She quoted advice from North Sydney Council: "Tree roots don't invade pipes unless they are leaking and water and nutrients are seeping into the soil.

"Most old sewer pipes, usually clay pipes, are in sections and are in aged condition.

"They start leaking at the joints and fibrous roots penetrate pipes, expand and block them."

Ms Wilder said: "Be sure to educate yourself and others on the reality that pipes crack when they are old and only then will roots become opportunistic.

"This problem is resolved by replacing old clay pipes with new PVC pipes or re-sleeving the line.

"It must be remembered that removing the tree does not fix the hole in the pipe and other vegetation is likely to capitalise on the opportunity for moisture and nutrients."

SOURCE:

Social media, 10 Aug 2021

Jenny Wilder, GUST