They intended to defraud this home owner engaged under contract for their own profit. This wasn't unforeseeable or accidental damage nor due to a misunderstanding on their part.
It's also not a dichotomy. It can be both criminal and civil. Victims always have the right to seek compensation in parallel with criminal punishment.
Another excellent legal statement from The Mafia /s
Aside from the obvious joke, I feel like a lot of people miss that you can pursue BOTH civil and criminal cases for a given crime. If a billionaire murders your spouse you absolutely can sue them for wrongful death. That doesn't preclude them to also going to jail for 20+ years.
It's probably easier to handle as civil negligence. Criminal damage has an intent component. Of course it would hinge on discovery - as soon as you find an email to the effect of "we know this will cause damage, let's test it on someone else's house", that counts as intent.
It's also not a dichotomy. It can be both criminal and civil. Victims always have the right to seek compensation in parallel with criminal punishment.