FireApproved
On this page
  1. Why it matters
  2. How an 8180 row is built
  3. The 8180-2299:0500 walkthrough
  4. The sibling and the underlayment trap
  5. The paths after you finish the row
  6. What people mix up
  7. How to check
  8. Limits
  9. Related records

Home / Guides / How to read a record / How to read a Class A roof listing

How to read a Class A roof listing

Last verified 2026-08-25.

A Class A roof listing is a tested stack. Read covering, deck, slope, and underlayment. OSFM category 8180 is that stack in the WUI handbook. 8180-2299:0500 is one Metal Sales Image II assembly. The sibling 8180-2299:0501 is not the same deck. An underlayment row is not a finished roof. Search the BML for the ID. A bag of shingles is not the listing.

You are holding an 8180 handbook row. The covering name is the easy line. The product is the deck, the slope, the underlayment, and the covering as tested.

This page walks those rows. Covering versus assembly is the concept. Class A covering is not a bag is the purchase-moment myth. How to read a listing is the five-document map. Do not stop at any of those hubs.

Why it matters

Embers and brands hit the roof you built, not the brochure. ASTM E108 classifies a covering applied as intended on a deck. Change the deck or skip the named underlayment and you do not have that class. See ASTM E108 / UL 790. If you write “Class A metal” and skip the ID, plan review has nothing to match.

How an 8180 row is built

Category 8180 is non-wood roof covering and assemblies for the WUI. The 2 September 2025 handbook names a listee, a DESIGN (the stack), a test protocol, and a rating. On these rows the protocol is ASTM E108 and the rating is Class A Roof Covering.

Search the listing ID at the GOVmotus index. That URL is a search box, not a permalink. Listings change. Confirm the live record. Do not spec from this site’s summary.

OSFM states listing is not a statutory mandate for most WUI products. Presence is not a permit. Absence is not a ban. See listed is voluntary.

UL 790 is the twin method. If your job cites a UL file instead of 8180, read covering, deck, slope, and underlayment the same way. This page does not host a UL Product iQ screenshot.

The 8180-2299:0500 walkthrough

Open Metal Sales Image II (8180-2299:0500). The 2 September 2025 handbook row says:

FieldWhat 0500 namesWhy it is not optional
Listing ID8180-2299:0500The sibling 0501 is a different stack
CoveringMetal Sales Image II standing-seam metal, named fastenersThe brand is not the listing
Slope5:12A shallower roof is not this row
Deck15/32 inch AC exterior-grade plywood, moisture not greater than 8%OSB is the other row
Existing underlaymentOne layer ASTM D226 #15 Type II felt, T50 staples 18 inches on centerNamed, not “felt”
New underlaymentTwo layers of GAF VersaShieldSkipping it is not this class
Existing coveringOne layer of Class A shinglesThis is a recover stack as written
New coveringImage II, #10-16 pancake or #8-15 truss-head wood screwsFasteners are in the listing
Protocol / ratingASTM E108, Class A Roof CoveringNot E84, not a bag

1. Letters and number. 8180 is the category. 2299:0500 is the row. Do not write 2299:0501 and mean this stack.

2. Slope. 5:12. If the drawing is 3:12, this row does not apply.

3. Deck. 15/32 inch AC plywood, moisture cap 8%. The sibling row uses nominal 7/16 inch OSB plus 1/2 inch DensDeck. Same covering family. Different assembly.

4. Underlayment. Existing felt plus two layers of VersaShield. That is not “any underlayment.”

5. Existing covering. The handbook names a single layer of Class A shingles under the new metal. If you are stripping to the deck, you are not in this recover description. Confirm with the official and the live record.

6. Fasteners. The listing names the screws. A generic clip note is not that line.

The sibling and the underlayment trap

8180-2299:0501 is still Image II, still 5:12, still ASTM E108 Class A. Deck is OSB plus DensDeck. Underlayment is Titanium UDL 30 stapled with a 3 inch overlap. Covering is 16 inch 26-gauge Image II with the rib placed 6 inches from the OSB joint. If you mix 0500’s VersaShield with 0501’s OSB, you have invented a third assembly.

Owens Corning Titanium FR (8180-2372:0001) is a base sheet. The handbook’s approved Class A systems pair that underlayment with named clay tile, concrete tile, 26-gauge steel, or 0.032 inch aluminum, each on a named slope and a 15/32 inch plywood deck. The covering must itself be recognized in a listing report for Class A spread of flame per ASTM E108. The underlayment listing is not the roof.

The paths after you finish the row

  1. OSFM 8180. You have a named stack, ASTM E108, Class A. Put manufacturer, model, listing ID, deck, slope, and underlayment on the drawings. See show the product on the drawings.
  2. UL 790 / other listing body. Same four fields. Do not paste an 8180 ID onto a UL file, or the reverse.
  3. Prescriptive covering with no 8180 row. Oregon R327, where adopted, is a Class B-rated assembly floor, not Class A. Wood shakes are out. CWUIC 504.2 is Class A in mapped California areas, with named exceptions.
  4. Insurer or HOA Class A. IBHS Essential and some community specs still ask for Class A where R327 is Class B. Spec the stricter roof if you need both. That is not “the code.”

What people mix up

  • Writing “Class A shingles” or “Class A metal” with no ID, deck, or underlayment.
  • Using 8180-2299:0500’s covering name on 0501’s deck.
  • Treating 8180-2372:0001 as a finished roof.
  • Treating a 5:12 listing as a 3:12 listing.
  • Bookmarking GOVmotus as a permalink.
  • Telling an Oregon official that R327 requires Class A.
  • Treating presence in 8180 as a permit, or absence as a ban.
  • Inventing a UL file number you did not open.

How to check

  1. Search the BML for the listing ID. Open the handbook row or the live GOVmotus result.
  2. Copy covering, deck, slope, underlayment, and fasteners onto the drawing. All of them.
  3. If two 8180 numbers share a covering family, read both. Pick one stack.
  4. If the row is an underlayment, name the covering it is paired with.
  5. Name the adopted code. Class B floor in Oregon where R327 applies. Class A assembly in CWUIC mapped areas.
  6. Confirm the live record the week you submit. Listings get suspended.

If you cannot match deck, slope, and underlayment, do not spec it from our summary.

Limits

This page does not host the OSFM handbook. It does not replace covering versus assembly or ASTM E108. It does not rank brands. Two Metal Sales rows and one underlayment row are examples, not a catalog of 8180.

CMP-005 (covering versus bag at true scale) is not published yet. Read the listing text.

FireApproved is not the listing body and not the AHJ.

Questions

Is the covering name the Class A listing?

No. OSFM 8180 rows name a covering on a deck, slope, and underlayment, tested to ASTM E108. Metal Sales Image II appears on more than one 8180 number. Match the listing ID and the stack, not the marketing name.

Can I use 8180-2299:0500 on a 3:12 OSB roof?

That handbook row names a 5:12 slope and 15/32 inch AC exterior-grade plywood, plus named underlayments and an existing Class A shingle layer. A different slope or deck is a different assembly. The sibling row 8180-2299:0501 uses OSB plus DensDeck and a different underlayment. Confirm the live record.

Is an 8180 underlayment a finished Class A roof?

No. Owens Corning 8180-2372:0001 is Titanium FR underlayment used as a base sheet in named Class A systems with listed clay tile, concrete tile, steel, or aluminum coverings on named decks and slopes. It is not a covering specification by itself.

Does Oregon require this 8180 row?

No. Where R327 is adopted the floor is a Class B-rated assembly equivalent. OSFM listing is a California program and is voluntary for most WUI products. Deschutes County will accept handbook products when they are shown on the drawings. That is local practice.

Sources