Pemko 434ARL32 Full Mortise Automatic Door Bottom 32 in

Product Description

The PEMKO 434ARL32 is a full mortise automatic door bottom designed to provide a weathertight seal at the base of interior and exterior doors. When the door opens, the seal retracts automatically into the door bottom housing; when the door closes, it drops and contacts the threshold or floor surface to block drafts, dust, moisture, and noise. The unit ships at 34 inches in length, allowing the installer to cut it to fit a 32-inch door opening. The sponge neoprene seal compresses against the floor for consistent contact, and the mill finish aluminum housing blends with standard commercial and residential door preparations.

This door bottom is suited for commercial and residential applications where a mortised, concealed installation is required. It is commonly specified on wood or hollow metal doors in office buildings, hotels, multifamily residential units, and healthcare facilities where controlling air, sound, or light infiltration is a priority. Architects and door hardware distributors frequently specify the 434ARL32 on new construction and replacement projects. Installation is performed by door hardware technicians or finish carpenters familiar with mortise pocket routing and door prep.

Key Features

• Full mortise design conceals the mechanism inside the door for a clean finished appearance
• Automatic drop-seal action retracts on opening and seals on closing without manual adjustment
• Sponge neoprene seal provides consistent compression contact against thresholds and floor surfaces
• Mill finish aluminum housing resists corrosion in typical interior and light exterior environments
• Ships at 34 inches for field trimming to fit a 32-inch (2 feet 8 inches) door width

Compatibility

Designed as an OEM-style mortise automatic door bottom for standard 32-inch wide commercial and residential doors requiring a concealed, full mortise installation.

Installation Notes

Installation is typically performed by a licensed door hardware technician or experienced finish carpenter. The door must be removed and a mortise pocket routed to the correct depth and width before the unit is inserted and fastened. Verify floor and threshold clearance before finalizing the drop distance. Follow applicable local building codes and manufacturer installation instructions for fire-rated or smoke-labeled door assemblies.