Demolition of old building - when to cancel residential building insurance?

We have bought an old house with a very old residential building and fire insurance (2 separate contracts). The demolition is scheduled to begin in the next few weeks (radiators have already been removed and the clearing out is also done). However, after the interior demolition, there will be a break of about 3 months because the neighbor's power supply still needs to be switched via the roof truss and the electricity provider takes a very long time for that. The insurance letter arrived over the weekend with a note on the special termination right one month after the land register entry or receipt of the letter. Does it make sense to keep the residential building insurance (water damage, storm, hail) in place until the complete demolition (since you can definitely get out of it then)? I would have kept the fire insurance because in the event of a fire, the disposal of the construction debris is probably quite expensive.

I also let the insurances expire right in the middle of the demolition. If at all, it will be around €100 for the 3 months, just throwing that out there. Don’t dwell too long on this small matter and decide in a way that lets you sleep peacefully at night.

For €100, I can rent a mini excavator for a day and do earthworks that would otherwise cost me €500 if I outsourced them - that was my thinking on this topic :-)

The letter from the insurance arrived now over the weekend with a note about the special right of termination

They should know best until exactly when the insurance must run.