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, LLCFinancingInstallation & Repair · Asphalt shingles
NRCATrade manual
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.
Source: National Roofing Contractors Association · Industry publication · 2012
The National Roofing Contractors Association's guidance for asphalt shingle roof systems — the industry's own statement of what constitutes acceptable design and installation, covering deck preparation, underlayment, flashing, ventilation and the detailing that decides whether an assembly performs.
Why a contractor cares. NRCA guidance is the standard of care your work is measured against, and it is what a manufacturer's instruction sits on top of rather than replaces.
Why a public adjuster cares. When a scope omits a component the assembly requires, the argument that it is optional collapses against published industry guidance. This is the document that says what the trade considers necessary rather than nice to have.
A summary written by the National Roofing Directory, not an extract. The work itself is National Roofing Contractors Association's and is not reproduced here.
Provenance · Obtained from publicly circulated copies; no ownership claimed; removal honored on request
Source restriction · The copy carries a per-licensee NRCA reprint stamp: "Reprint permission granted to Robert Manson at Delta Engineering & Inspection Inc. No further reproductions authorized. May 11, 2016."
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
More from Installation & Repair
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
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
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
