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Kittitas County IR1 one-hour exterior-wall path

Kittitas County Code 20.10 prints material approved for at least one-hour fire-resistance-rated construction on the exterior side as one IR1 exterior-wall path.

This record covers only a documented one-hour product path. The complete exterior-side wall construction, foundation-to-roof extent, official IR class, water and defensible-space inputs, project scope, and County approval remain checks.

code · Unincorporated Kittitas County IR1 construction · Last verified 2026-08-27 · JSON (CC BY 4.0)

Published requirement text

“Materials approved for not less than 1-hour fire-resistance-rated construction on the exterior side.”

Kittitas County Code Title 20, Section 504.5 — Kittitas County

Where this instrument is documented

Instrument kcc-14-12-20-10.

Set a location to read how this instrument lands where you are.

PlaceForceReachDatedChecks openSource
Kittitas County active application documented unincorporated county adopted 2021-03-02 7 Kittitas County Code Title 20, Chapter 20.10 Wildland Urban Interface Code

Each place page carries that place's boundary, project scope and open official checks in full; this page's JSON twin carries them per application.

Machine-readable constraints

AttributeOperatorValue
fireResistanceMinutes gte 60

Products with documented matching attributes

Open the Build rules that quote this requirement

ProductCategoryStatusDocumented match evidence
Arclin Firepoint 2500 exterior wall sheathing assembly siding Listed
1 cited field

Sources

Kittitas County IR1 one-hour exterior-wall path. FireApproved. https://fireapproved.com/requirements/kcc-20-10-ir1-one-hour-exterior-wall/. Last verified 2026-08-27.