Roofing/Roofing Concepts (for Invoices or Estimates):

New Roof Installation
Roof Repair
Roof Removal and Installation
Replacement of Damaged Shingles
Asphalt Roofing Installation
Water Leak Repair
Flashing Installation and Sealing
General Roof Maintenance
Residential/Commercial Roofing Work
Complete Roof Replacement
TPO Membrane Installation
Wind or Rain Damage Repair
Gutter Cleaning and Repair

You may also use more professional phrasing, such as:

“Roofing Installation and Repair Services”
“Complete Roof Replacement Labor”
“Roofing System Supply and Installation”