FireApproved
On this page
  1. Why it matters
  2. How it works
  3. The paths
  4. What people mix up
  5. How to check
  6. Limits
  7. Related records

Home / Guides / How the documents differ / Colorado Wildfire Resiliency Code adoption

Colorado Wildfire Resiliency Code adoption

Last verified 2026-08-25.

This page is Colorado law.

Colorado’s live book is the 2025 Colorado Wildfire Resiliency Code, not unmodified IWUIC. The Wildfire Resiliency Code Board established it on 1 July 2025 through 8 CCR 1507-39. CWRC 101.1 is written to be adopted by a named jurisdiction. Confirm the local ordinance.

You are looking at a mapped Colorado lot and asking whether Class 1 or Class 2 binds a new roof or a reroof. The answer is the official fire-intensity map plus the local adoption. This site does not read your parcel.

Why it matters

Class 1 is a thin package. Class 2 adds walls, eaves, decks, glass, and doors. Mixing them is a failed inspection. Oregon R327 and California CWUIC are different books.

How it works

CWRC 303.2 records fire intensity as low, moderate, or high. CWRC 303.3 sends low to Class 1 structure hardening and moderate or high to Class 2. Class 2 includes Class 1 (404.1).

Class 1 (403) is a Class A roof (ASTM E108 or UL 790), noncombustible gutters, and attic/rafter/underfloor vents listed to ASTM E2886 or covered with 1/8-inch noncombustible mesh.

Class 2 (404) adds eaves, exterior walls, underfloor enclosure, decks, glazing, doors, and vehicle-door gaps.

Existing work is not a full gut. CWRC 101.5, 101.6, and 101.7 name a 500-square-foot footprint trigger, a 25 percent roof trigger, and a 25 percent exterior-wall trigger.

The paths

  1. Local ordinance that meets or exceeds CWRC. Spec that text.
  2. Mapped low intensity. Class 1 roof, gutters, vents.
  3. Mapped moderate or high. Class 2, which includes Class 1.
  4. Unmapped or excepted. Confirm the official. HUD first installs are exempt from structure hardening (101.2.3).

What people mix up

  • Treating DFPC’s book as self-executing without a local stamp.
  • Using IWUIC IR 1 / 2 / 3 class numbers. CWRC has Class 1 and Class 2 only.
  • Importing California Zone 0 or Oregon R327 onto a Colorado drawing.

How to check

  1. Open the CWRC and the Board page.
  2. Ask the building official which ordinance is adopted.
  3. Use the official Fire Intensity Classification map. Do not treat this page as a lot determination.
  4. Match Class 1 versus Class 2 to the map class, then spec roof, vents, and walls from that class.

Limits

This page does not quote a local ordinance we have not opened. It does not decide insurance credit. It is not IBHS.

Questions

Is CWRC already in force on every Colorado lot?

No. The Wildfire Resiliency Code Board established the 2025 book on 1 July 2025 through 8 CCR 1507-39. CWRC 101.1 is written to be adopted by a named jurisdiction.

What is Class 1 versus Class 2?

Low fire-intensity maps take Class 1 structure hardening (roof, gutters, vents). Moderate or high take Class 2, which includes Class 1 and adds walls, eaves, decks, glazing, and doors. Confirm the official map and the building official.

Does this site read my parcel?

No. DFPC points at a Fire Intensity Classification map. Link the official tool. Do not treat this page as a lot determination.

Sources