Roofing Reference Materials
Charts, tables, code requirements, and technical specifications every roofer and homeowner needs. Bookmark these pages for quick access during your project.
Cost & Pricing
Roofing Cost Index
Regional roofing cost data including material and labor pricing by market. Track price trends and compare costs across different areas of the country.
View referenceWarranty Comparison Chart
Side-by-side comparison of manufacturer warranties from GAF, Owens Corning, CertainTeed, and more. Coverage periods, transferability, and what voids a warranty.
View referenceMaterials & Coverage
Shingle Coverage Chart by Brand
How many square feet does a bundle cover? Reference chart for GAF, Owens Corning, CertainTeed, Tamko, and IKO shingles with bundles per square for each product line.
View referenceRoofing Material Weight Chart
Dead load weights for all roofing materials in pounds per square foot and per roofing square. Essential for structural load calculations.
View referenceRoof Lifespan Chart
Expected lifespan of every roofing material — asphalt shingles, metal, tile, slate, and more. Factors that shorten or extend roof life and when to plan replacement.
View referenceAverage Roof Size Chart
Average roof sizes by home square footage, stories, and roof style. Use these benchmarks to estimate material quantities before measuring.
View referenceBuilding Codes & Permits
Building Code Requirements
Key residential roofing code requirements including underlayment, ice barrier, ventilation, and fastener rules from IRC and local amendments.
View referenceRoofing Permits by State
State-by-state guide to roofing permit requirements. Which jobs need a permit, typical fees, inspection steps, and penalties for unpermitted work.
View referenceWind Zone Map & Requirements
US wind zone classifications with required shingle ratings, nail patterns, and supplementary fastening requirements for each zone.
View referenceSnow Load Map
Ground snow load values (psf) mapped across the US. Structural requirements for roof framing, ice dam protection zones, and minimum slope requirements by region.
View referenceRoof Design & Structure
Roof Pitch Multiplier Table
Complete reference table of pitch multipliers from flat (0/12) to extreme (24/12). Use these multipliers to convert footprint area to actual roof area based on your pitch.
View referenceRoofing Nail Patterns & Spacing Guide
Nail placement diagrams for shingles, underlayment, and flashing. Includes standard and high-wind zone patterns per manufacturer specifications.
View referenceRoofing Terminology Glossary
Comprehensive A-Z glossary of roofing terms. From "apron flashing" to "zinc strip," every term a homeowner or contractor needs to know.
View referenceColor & Style
Roof Color Guide
How to choose the right roof color for your home. Covers curb appeal, energy efficiency, HOA rules, and how color interacts with siding, trim, and climate.
View referenceShingle Colors by Brand
Browse shingle color options from GAF, Owens Corning, CertainTeed, Tamko, and IKO. Compare palettes, see popular picks, and find matching accessories.
View referenceNeed to Run the Numbers?
Use our free calculators alongside these reference materials to plan your roofing project with confidence.
Browse All Calculators