That is most certainly illegal.
Is parkour on roofs illegal.
These will be the offences.
The main issue traceurs have had with law enforcement have been involving private property and trespassing laws.
If your parkour practice disturbs the general public.
However many public buildings have posted no trespassing signs which makes it illegal to be there at all.
Nowadays many traceurs want to start parkour.
The parkour itself is not illegal.
I know that s not the point you re arguing just thought i d mention it.
On the other hand stats are showing that it is expanding day by day and also catching the attention of law enforcing agencies.
Disregard for public property.
I understand your feelings for the subject.
Although parkour is famous many peoples still don t know about parkour.
But in the course of practice if any material like railings walls etc tend to break then the law comes into the picture.
But the one common question arises in their mind that is parkour illegal.
Speaking very generally there is no law that goes specifically against parkour saying it is unlawful to practice it.
People get away with it because in many places the roofs are easy to access.
And no offense joshbeast but you sound abrasive.
It can be a high risk activity which is why in some situations a traceur someone who does parkour can end up in legal trouble.
And let s be honest.
Parkour itself is not illegal but if you practice on private property you can get cited fined or even arrested for trespassing depending on local laws source.