The industry
20 biggest suppliers & makers
QXO, Inc. (formerly Beacon Building Products)Supplier
SRS Distribution Inc.Supplier
Gulfeagle Supply (Gulfside Supply, Inc.)Supplier
IKO IndustriesManufacturer
Atlas Roofing CorporationManufacturer
TAMKO Building ProductsManufacturer
Malarkey Roofing ProductsManufacturer
Johns ManvilleManufacturer
EagleViewSoftware
JobNimbusSoftware
GreenSky, LLCFinancingThe roofing library · 9 documents · newest first
Manufacturer technical bulletins and installation references — the printed instructions that are enforceable alongside the code.
Every document here names its publisher. Documents were gathered from public circulation and are posted in good faith with attribution — no ownership is claimed, nothing is sold, and rights holders can have anything removed on request. Read the content notice
GAF's bulletin on whether new shingles can be used to repair an aged roof — it allows it when dimensions and exposure match, warns that a perfect color blend is "not likely," forbids trimming shingles to match, and notes aged shingles crack during repair. Central to matching disputes.
GAFGAF Residential Consumer Services · 2025
A verbatim, unedited text transcription of Chad T. Williams's peer-reviewed NAFE article on the Repairability Assessment Method — a structured way to judge whether an asphalt shingle roof can be spot-repaired without propagating damage. Figures are not reproduced; the published citation and copyright notice head the file.
NAFEJournal of the National Academy of Forensic Engineers — Chad T. Williams, PE · 2020
Chad Williams's peer-reviewed method for deciding whether an asphalt shingle roof can be repaired in place: a structured test of whether removing and replacing damaged shingles will itself damage the surrounding roof. The original published PDF, with figures.
NAFEJournal of the National Academy of Forensic Engineers — Chad T. Williams, PE · 2020
Owens Corning's bulletin confirming that its limited lifetime warranties require Owens Corning starter strip and hip-and-ridge products, and stating that an inverted three-tab or cut laminate used as starter is not acceptable because it puts the sealant in the wrong place.
Owens CorningOwens Corning · 2019
One-page GAF bulletin on how underlayment must be lapped over a hip when only one roof plane is being replaced, including removing end nails on the adjacent plane and re-nailing — the detail that turns a single-slope repair into work on the neighboring slope.
GAFGAF Technical Services · 2017
Metal Panels Inc.'s 38-page installation manual for through-fastened AG panels: design guidelines, storage and handling, panel and trim installation sequence, accessories and load tables, with the UL 90, UL 2218 Class IV and UL 790 Class A listings for the panel.
Metal PanelsMetal Panels Inc. · 2016
GAF's commercial technical advisory bulletin on hail that scours granules off a granule-surfaced membrane: what to inspect for, when coating the membrane is an acceptable repair, and the Diamond Pledge guarantee question that follows a coating repair.
GAFGAF Technical Services · 2015
NRCA's 570-page commercial low-slope manual covering roof system configurations, decks, air and vapor retarders, insulation and the membrane systems themselves, with the January and July 2016 updates. The standard technical reference for commercial roof disputes.
NRCANational Roofing Contractors Association · 2015
The National Roofing Contractors Association's 90-page guideline volume for steep-slope asphalt shingle systems — substrates, underlayment, flashing, ventilation and application detail — the trade-standard reference both sides cite in installation disputes.
NRCANational Roofing Contractors Association · 2012
