The roofing reference
Every roofing material, product, and code — in one sourced place.
A structured, provenance-disciplined reference for homeowners, contractors, and adjusters. Every entry is backed by a cited, dated source.
- MaterialsShingles, membranes, metal, tile38
- ProductsNamed lines by manufacturer4383
- ManufacturersGAF, Owens Corning, CertainTeed…314
- SuppliersDistributors & branch locations277
- Trade OrganizationsNRCA, ARMA, MRA, TRI…93
- Permitting AuthoritiesPermit rules across 41 states5289
// popular entries
- Material
Class 4 Impact-Resistant Shingle
Asphalt (often SBS-modified rubberized) shingles that pass UL 2218 Class 4, the highest impact rating, resisting a 2-inch steel ball dropped from 20 feet without cracking.
- Product
GAF Timberline AH
GAF's Timberline AH Shingles, also sold as Timberline American Harvest Shingles, are architectural asphalt shingles that GAF described as architecturally stylish yet practically priced. GAF's product page cited a custom-designed color palette of subtle blends with contrasting colors, Advanced Protection Shingle Technology, and Dura Grip adhesive.
- Permitting
City and County of Denver - Community Planning and Development
The permitting authority for the consolidated City and County of Denver. Community Planning and Development issues building permits, including residential and commercial reroofing permits, and licenses contractors.
- Material
TPO Membrane
A single-ply thermoplastic polyolefin membrane with heat-welded seams, widely used on low-slope commercial roofs. Typically white and highly reflective (cool roof).
// roofing permits by state
- Colorado291
- Arkansas12
- California442
- Connecticut140
- Florida148
- Georgia48
- Idaho43
- Illinois21
- Indiana84
- Iowa24
- Kansas96
- Kentucky15
- Louisiana56
- Maine126
- Maryland23
- Massachusetts156
- Michigan760
- Minnesota57
- Missouri25
- Montana11
- Nebraska45
- New Hampshire136
- New Jersey462
- New Mexico12
- New York58
- North Carolina60
- North Dakota35
- Ohio113
- Oklahoma75
- Oregon73
- Pennsylvania1043
- Rhode Island39
- South Carolina70
- South Dakota17
- Tennessee24
- Texas65
- Utah16
- Virginia69
- Washington150
- Wisconsin139
- Wyoming10
// browse by attribute
Roofing by city
Per-city hubs: local permit rules, roofing suppliers, and hail materials for Colorado cities.
Roofing permits by county
All 64 Colorado county rollups plus cross-cutting views: 2024 I-Codes, permit exemptions, SAFEbuilt towns, contractor licensing, and Wildfire Resiliency Code adopters.
Roofing materials by attribute
Class 4 impact-resistant, by slope, by material family, and Class A fire-rated.
Roofing suppliers by city
Distributors and supply houses by their Denver-metro and Front Range branch cities.
Roofing products by attribute
Specific product lines rated Class 4 impact-resistant or Class A fire-rated — real SKUs, not just categories.
Roofing manufacturers by material
Which manufacturers make asphaltic, metal, single-ply, synthetic, and tile/slate roofing products.