Thermwell U36H Aluminum Drip Cap Door Bottom 36 Inches

Product Description

The THERMWELL U36H is an aluminum drip cap and door bottom combination designed to seal the base of exterior doors against weather infiltration. The L-shaped profile integrates a drip cap above the door bottom sweep, directing water away from the threshold while reducing drafts and debris entry. Measuring 1-3/8 inches wide by 36 inches long, this unit ships in a package quantity of 12 and weighs 6 pounds per package. It is a direct-fit replacement component suited for residential and light commercial door applications and is typically installed by carpenters, general contractors, or experienced maintenance technicians.

The U36H is designed for use on exterior swinging doors in residential and light commercial settings. Its dual-width compatibility makes it a versatile stock item for service calls where door thickness varies across a single property or job site. It fits both 1-3/8 inch and 1-3/4 inch door thicknesses without modification to the base extrusion. When the vinyl insert requires replacement, the manufacturer-specified replacement insert is TV 176-740. This product is well-suited for door weatherization retrofits, new construction rough-in, and routine maintenance programs.

Key Features

• L-shaped aluminum extrusion combines drip cap and door bottom in a single unit
• Fits both 1-3/8 inch and 1-3/4 inch door thicknesses
• 36 inch length accommodates standard residential door widths with field-cuttable stock
• Aluminum construction resists corrosion in exterior weather exposure
• Replacement vinyl insert available: TV 176-740
• Sold in a package quantity of 12 for jobsite and distributor stocking

Compatibility

Fits both 1-3/8 inch and 1-3/4 inch exterior doors. Designed as an OEM-style replacement door bottom for standard residential and light commercial swinging door applications. For replacement of the vinyl insert only, use part TV 176-740.

Installation Notes

Installation is typically performed by a carpenter or general maintenance technician using basic hand tools. The aluminum extrusion can be cut to finished door width using a hacksaw or miter saw with a metal-cutting blade. Remove the door from its hinges before fitting the door bottom to ensure accurate alignment and fastener placement. Inspect the threshold and door frame for rot or damage before installing the new door bottom.