Your claim may be unrelated to the guarantee, because the damage was incidental to the work being performed. Regardless, the damage is certainly something that an insurer should look at as it ocurred because the contractor was on your property as part of the job.
You should notify the contractor in writing that you want compensation and request that he submit the claim to his insurance carrier. If you don't receive an amicable resolution, you can sue.
Answered on Jan 25th, 2013 at 12:19 PM