Thermwell A79WHA Aluminum Rubber Door Bottom 2x36 White

Product Description

The THERMWELL A79WHA is an aluminum-reinforced rubber door bottom designed to seal the gap between a door and the threshold. The unit measures 2 inches wide by 36 inches long and features a white finish. It combines a rigid aluminum backing with a flexible rubber seal to block drafts, dust, and moisture at the base of an exterior or interior door. HVAC technicians, weatherization contractors, and general contractors install this type of door bottom as part of building envelope work or energy efficiency retrofits.

This door bottom is suited for residential and light commercial applications where a low-profile threshold seal is needed. The 36-inch length accommodates standard door widths and can be trimmed to fit narrower openings. The white finish is compatible with painted or white-framed door assemblies. It is typically applied to the interior face of the door bottom or mounted directly to the door slab depending on door construction.

Key Features

• Aluminum-reinforced backing provides rigid support and resistance to bending during installation and use
• Flexible rubber seal compresses against the threshold to block drafts, dust, and light moisture intrusion
• White finish suits standard painted door assemblies
• 36-inch length accommodates most standard residential door widths and can be field-cut to size
• Packaged in units of 12, supporting multi-door or multi-unit service calls

Compatibility

Designed as an OEM-style replacement or new-installation door bottom for standard residential and light commercial doors requiring a 2-inch by 36-inch aluminum-reinforced rubber seal.

Installation Notes

Installation is typically performed by a general contractor, weatherization technician, or qualified tradesperson using basic hand tools including a hacksaw or tin snips for trimming and a drill or screwdriver for fastening. Measure the door width accurately before cutting the door bottom to length to ensure a flush fit. The door bottom should be mounted level and flush against the door face so the rubber seal makes consistent contact with the threshold across the full width. Follow local building codes regarding weatherstripping and door sealing requirements for energy compliance where applicable.