Exterior Door Thresholds: Choosing the Right Fit for Your Entryway
A well-sealed exterior door starts at the bottom. The right threshold helps reduce drafts, manage moisture, and create a clean transition between your home’s interior and exterior.
At Hartford Building Products, we offer exterior inswing and outswing door thresholds, along with compatible threshold extenders. Whether you’re replacing a worn threshold or completing a new installation, choosing the correct style and size helps ensure a proper fit and dependable weather protection.
What Does an Exterior Door Threshold Do?
An exterior door threshold sits at the bottom of an entry door opening. It works with the door’s bottom seal and weatherstripping to help close gaps where air and moisture could enter.
A properly selected and installed threshold helps:
- Reduce drafts beneath the door
- Limit water infiltration
- Support effective sealing with door sweeps and weatherstripping
- Protect the bottom of the door opening from everyday wear
- Give the entryway a finished appearance
Inswing or Outswing: Choose the Correct Style
Before ordering, check which direction your door opens.
Inswing doors open into the building and require an inswing threshold.
Outswing doors open toward the outside and require an outswing threshold.
Choose a threshold designed for your door’s swing direction to support proper fit, sealing, and drainage.
Measure for the Right Fit
Threshold length and width describe two different measurements:
- Length: The distance across the bottom of the doorway, from side to side.
- Width: The depth of the threshold, from the interior edge to the exterior edge.
Measure both dimensions before ordering, and compare the replacement threshold’s profile with your existing door assembly.
Our thresholds are supplied oversized to allow for trimming during installation. Check the listed dimensions for the product you select, then trim as needed for an accurate fit.
Features That Support Lasting Performance
Our adjustable inswing threshold options combine a composite cap and base with an aluminum sill surface.
Adjustable Composite Cap
The adjustable cap can be raised or lowered to meet the door’s bottom seal. This allows you to fine-tune contact for an effective seal while keeping the door operating smoothly.
Moisture-Resistant Composite Base
The composite base resists moisture and rot, providing durable support at the bottom of the doorway.
Aluminum Finish Options
Choose a finish that complements your entryway:
- Mill-finish extruded aluminum: A silver appearance.
- Dark bronze anodized aluminum: A darker finish that coordinates with bronze hardware and trim.
When Is a Threshold Extender Needed?
A threshold extender adds coverage when a compatible threshold needs additional width. This can help accommodate a deeper doorway assembly or extend the sill surface toward the exterior.
Extenders must match the threshold’s profile and attachment design. Review our threshold extender options and confirm compatibility before ordering.
Available Inswing Threshold Options
For exterior doors that open into the building, our inswing selection includes:
| Feature | Options |
|---|---|
| Nominal lengths | 36" and 72" |
| Widths | 4 9/16", 5 5/8", and 7 13/16" |
| Finishes | Mill-finish silver aluminum and dark bronze anodized aluminum |
| Construction | Composite oak cap and composite base |
Review the individual product listing for exact dimensions, configuration, and extender compatibility.
Complete Your Entryway with the Right Threshold
A properly fitted threshold works together with the door sweep, weatherstripping, and correct installation to help protect your entryway from the elements.
Explore Hartford Building Products’ exterior door thresholds and compatible extenders to find the right combination for your doorway.