The stove manual specifies a 3/8" UL‑1618 Type 1 floor pad that must be non-combustible. What is the ideal combination of materials—such as cement board, tile, and insulation—that satisfies the listing requirements? How do these options compare to a DIY assembly in terms of safety and compliance? Let’s explore the best practices for constructing a safe and effective floor protector for your wood stove.
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Use a non combustible core like cement board over a sturdy base, topped with tile or stone, with layers built to meet the R-value and ember protection UL-1618 Type 1 requires.
A UL-1618 Type 1 floor protector isn’t fireproof. It just stops your floor from getting too hot with its R-value. The easiest way to make one yourself? A sandwich of cement board (like Durock) over mineral wool (like Roxul), finished with tile or metal. The mineral wool insulates, the cement board supports, and the tile or metal makes it last and look good.
Type 1: noncombustible layer only—e.g., plywood subfloor, cement board, then tile/stone. No R-value needed.
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A safe, compliant wood stove floor pad meeting 3/8" UL-1618 Type 1 can be built with cement board over non-combustible insulation, topped with tile. Factory-listed pads ensure tested protection; DIY must replicate certified assemblies precisely.
Cement Board and Tile:
-Cement Board: Provides a non-combustible base with excellent fire resistance.
-Tile: Ceramic, porcelain, or natural stone tiles offer heat resistance, durability, and aesthetic appeal. Ensure the tile and adhesive meet heat resistance requirements.
Insulation and Metal:
-Insulation: Use fire-resistant insulation materials like fiberglass or mineral wool to provide thermal protection.
-Metal: A metal sheet (e.g., steel or aluminum) can be used as a base layer, providing durability and heat resistance. Ensure proper insulation to prevent heat conduction.
For a UL 1618 Type 1 wood stove floor pad, use a non-combustible base like cement board, add optional mineral fiber for heat insulation, and finish with a tile, slate, or metal surface. Extend the pad beyond the stove edges, seal all layers, and use fire-rated mortar or grout. DIY pads can be safe and customizable if layered correctly, while prefabricated pads offer guaranteed compliance and easier installation.
A UL 1618 Type 1 floor protector typically uses:
Top layer: noncombustible sheet (ceramic tile, stone, or metal plate)
Middle layer: thermal insulating board (cement board or mineral board)
Bottom layer: rigid noncombustible base (cement backer or gypsum board)
Layer thicknesses and spacing depend on stove rating and clearances; UL 1618 specifies minimum thermal resistance and noncombustibility for each layer.
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