Calculate the number of roofing felt rolls required to cover the roof. Felt provides a water-resistant underlayment layer beneath shingles.
Enter your values below
Total roof area in square feet.
Coverage area per roll (default 432 ft² for standard 15 lb felt).
How this calculator works
Number of rolls equals roof area divided by the coverage area per roll (typically 216-432 ft² per roll).
Common questions about this calculator
