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 · Low-slope membranes
NRCATrade manual
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.
Source: National Roofing Contractors Association · Industry publication · 2015
The NRCA Roofing Manual volume covering membrane roof systems — roof configurations, decks, air and vapour retarders, insulation and the membrane assemblies used on low-slope commercial roofs. It is the reference the commercial side of the trade works from.
Why a contractor cares. Commercial membrane work is where assumptions get expensive. The manual sets out what each configuration requires before it will perform as designed.
Why a public adjuster cares. Commercial losses turn on whether a repair can be integrated into an existing membrane at all. The manual is where the technical answer to that lives, and it is published by the contractors' own association rather than by either party to the claim.
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 Chuck Heidler at Simon Roofing & Sheet Metal Corp. No further reproductions authorized. Jan 10, 2018."
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
