Service estimate to run sewage machine down already pulled toilet to attempt to clear blockage. If blockage is unable to be cleared with the machine then the line will need to be jetted. Main line stoppage in house. House is being remodeled and is currently vacant. Toilet in hall bathroom already pulled and was filled up to top of flange. Ran sewer machine down all the way and did not hit anything. Went into walk in crawl space and opened up cleanout and ran machine down 70 feet and hit tree roots. Could not get past the tree roots. Informed homeowner that the line needs to be jetted to clear the tree roots. Customer signed off on the estimate under the impression that a portion of today's payment will be applied to the jetter estimate.