Roofing Felt Calculator

Understanding Roofing Felt

Roofing felt provides an essential water-resistant barrier between your roof deck and shingles.

  • Types of Felt Different weights and materials offer varying levels of protection.
  • Coverage Area Roof pitch affects the actual surface area to be covered.
  • Installation Method Proper overlap and fastening techniques are crucial.
  • Weather Protection Additional considerations for different climate zones.

Material Comparison

15# Felt

Standard protection, economical choice for most applications.

30# Felt

Heavier duty, better protection, longer exposure rating.

Synthetic

Superior strength, lighter weight, better weather resistance.

Premium

High-end protection, advanced materials, and features.

Installation Tips

  • Proper Overlap Minimum 2-inch side laps, 4-inch end laps.
  • Fastening Use appropriate cap nails or staples.
  • Weather Conditions Install in dry conditions for best results.
  • Special Areas Extra attention to valleys and penetrations.

Maintenance Guide

  • Regular Inspection Check for damage or exposed areas.
  • Repair Needs Address any tears or loose sections promptly.
  • Ventilation Ensure proper attic ventilation to prevent moisture issues.
  • Replacement Replace felt during roof replacement.