Thermwell ST26A Aluminum Door Threshold 3x36 Low Rug

Product Description

The THERMWELL ST26A is an extruded aluminum door threshold designed for standard low rug applications in residential and light commercial entryways. At 3 inches wide and 36 inches long, this economy-grade threshold bridges the gap between the door bottom and the floor surface, reducing drafts and providing a smooth transition across the door opening. The extruded aluminum construction offers durable, corrosion-resistant performance suitable for frequent foot traffic. This threshold is a straightforward, field-ready component installed by general contractors, handymen, and door hardware technicians during new construction or replacement service calls.

The ST26A suits interior and exterior door openings where a low-profile threshold is required to accommodate standard-height rugs or mats on the interior side. Its 36-inch length fits most standard single-door frames without cutting, though it can be trimmed on-site as needed. The economy grade makes it a practical choice for rental properties, multi-unit residential buildings, and budget-conscious renovation projects. When the vinyl insert wears, it can be replaced using the RV36H replacement insert rather than replacing the full threshold body.

Key Features

• Extruded aluminum construction for corrosion resistance and long service life
• Standard low rug profile accommodates typical interior rug and mat heights
• 3 inches x 36 inches dimensions fit most standard single-door openings
• Economy grade offers cost-effective performance for high-volume or budget applications
• Compatible with RV36H replacement insert for easy vinyl renewal without full threshold replacement

Compatibility

Designed as an OEM-style replacement or new-installation threshold for standard 36-inch residential and light commercial door openings. Replacement vinyl insert model RV36H is compatible with this threshold body.

Installation Notes

Door thresholds are typically installed by carpenters, general contractors, or experienced handymen using basic hand tools including a hacksaw for length trimming and a drill for fastener holes. Ensure the door bottom clearance is measured before installation to confirm the low-rug profile height is appropriate for the application. Fasten securely to the sill per the door manufacturer's recommendations and local building code requirements. Do not overtighten fasteners, as this can bow the aluminum extrusion and reduce the seal against the door bottom.