Do you mean Insuring the possibility of you scratching glass ?
The only portion of my Insurance that covers me messing up glass is the
" Care - Custody - Control Rider ". Mine was 5k and we upped it to 10K coverage. If you don’t understand what this means please query search field and read past post. There are valuable discussions regarding this topic.
A Short Example : Lets say we clean windows on a new house and scratch all the windows causing $50,000.00 in damages and they all need replaced. My Insurance would pay $10,000.00. I pay the balance of $40,000.00.
But… if I am cleaning windows on the same house, and one of my workers accidentally knocks over a space heater and the house burns down. My Insurance will build them a new house and cover all their expenses and my cost is limited to my deductible. Then they will promptly cancel my policy…LOL !