Thermwell DT36/36A Aluminum Door Threshold 3.75x36 in

Product Description

The THERMWELL DT36/36A is a super deluxe heavy extruded aluminum door threshold designed for residential entry doors. Measuring 3.75 inches wide by 36 inches long, it provides a low-profile rug-height transition that reduces tripping hazards and seals the gap at the base of a door. The threshold features a replaceable vinyl insert that creates a weathertight seal without requiring full threshold replacement when the insert wears. Licensed contractors and experienced installers typically handle this component as part of door weatherization or replacement projects.

This threshold is suited for residential exterior door installations where a low-rug profile is required. The 36-inch length fits standard single-door rough openings. The replaceable vinyl insert design makes it a practical long-term solution for entry doors subject to regular foot traffic. The compatible replacement insert is model RV36H. It is appropriate for single-family homes, apartments, and light commercial entry applications with standard door widths.

Key Features

• Heavy extruded aluminum construction for durability under regular foot traffic
• Low rug profile reduces tripping hazard at door transitions
• Replaceable vinyl insert extends service life without full threshold swap
• Compatible replacement insert: model RV36H
• 36-inch length fits standard residential door openings
• Designed for residential exterior door weatherization

Compatibility

Designed as an OEM-style replacement or new-install threshold for standard 36-inch residential exterior doors. Compatible replacement vinyl insert is model RV36H.

Installation Notes

Installation is typically performed by a general contractor, carpenter, or experienced installer. Remove the existing threshold and clean the sill surface before fitting the new unit. Secure the threshold using appropriate fasteners through the pre-drilled mounting holes, and ensure the vinyl insert seats evenly across the full width of the door sweep. Confirm the door closes smoothly against the insert without binding before completing the installation.