Blocks and Cutstock (8140-2126:0500)
This is a listed siding assembly. Listing 8140-2126:0500. This site cites SFM 12-7A-1. Match the model and orientation.
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Blocks and Cutstock's California wildfire-area listing has lapsed: it appeared in the 2025 handbook but not in the current listing.
The product is a treated radiata pine siding line, sold in several profile patterns under the Heritage Plus Siding & Trim name.
It once carried listing number 8140-2126:0500 in category 8140 of California's Building Materials List, tested against SFM 12-7A-1, placing it among products approved for wildfire-hazard areas. The State Fire Marshal's 2025 handbook, dated that September, still showed the listing.
Within the year it dropped off the live list, and nothing available explains why. A listing can lapse because it expired on schedule, because the manufacturer withdrew it, or because the product moved to a new listing number, and from outside, those three look the same.
For anyone specifying siding in a fire-prone area, last year's handbook entry is not enough on its own. What a reviewer checks is the current, active listing, and this product's number does not appear there right now. That gap is the reason to confirm its status directly before counting on it for a wildfire-zone project.