Roofing decision library
Roofing comparisons
Side-by-side roofing choices without declaring one universal winner.
Browse this collectionA comparison is useful only when the two choices solve the same roof problem and the proposals include the same underlying work.
Hold the base roof constant
- GAF Timberline HDZ vs. Owens Corning Duration — Compare nailing designs, Class 3 records, accessories, warranty paths, colors, and supply.
- GAF Timberline HDZ vs. CertainTeed Landmark — Compare standard Landmark and HDZ nailing designs, classifications, accessories, warranties, and supply.
- Owens Corning Duration vs. CertainTeed Landmark — Compare standard Landmark and Duration nailing designs, classifications, accessories, warranties, and supply.
- Architectural shingles vs. 3-tab shingles — Compare named product examples, pattern, application, classifications, repair matching, supply, and price.
- GAF Timberline UHDZ vs. HDZ: Class 4 vs. Class 3 — Compare two named Timberline products, package-qualified UL 2218 classes, appearance, algae terms, project price, and carrier records.
- Metal roofing vs. asphalt shingles — Compare named assemblies, attachment, detailing, service access, current quotes, and ownership priorities.
- Standing seam vs. exposed-fastener metal — Compare attachment, movement, inspectability, tested uplift, flashing, service, and comparable quotes.
- Synthetic underlayment vs. roofing felt — Compare named rolls, approved uses, fastening, exposure, handling, water resistance, and price.
- Ridge vents vs. box vents — Compare attic zones, low intake, roof geometry, rated net free area, placement, and other exhaust.
- TPO vs. PVC roofing — Compare named low-slope formulations, welded details, exposure compatibility, assembly design, repairs, and warranty limits.
- Roof repair vs. replacement — Compare inspection findings, defect location, surrounding serviceability, compatible material, access, and prior repairs.
- Roof overlay vs. full tear-off — Compare locally adopted code, product instructions, layer count, substrate condition, flashing access, and future removal.
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