We do a complete clean up, including running a magnetic sweep around the building to insure that all nails and materials are found and disposed of. One call will bring a roofer, not a salesman Ceiling Spots Dark water stains in your roof or on your ceiling Caused by leaks in roof Check roof for damaged shingles Check chimney and vents for cracks in flashing Check rafters for leaks that travel away from the original source Algae Growth Growth of algae on shingles Caused by growth of airborne algae deposited on roof Unsightly appearance does not affect the service life of the material Common problem in warm, humid climates Algae-resistant shingles available regionally Curling Bending/twisting shingles Caused by lack of ventilation Caused by improper