Hartford Building Products
Choose a threshold that fits your door swing, sill depth and door-bottom seal. Compare profiles, dimensions, lengths and compatible extenders, then shop the options that fit your entryway.
| Doorway need | Profile to compare | What to check |
|---|---|---|
| Exterior door opens into the building | Adjustable inswing threshold | Choose 4 9/16″, 5 5/8″ or 7 13/16″ width. Match the cap height to the door-bottom seal. |
| Exterior door opens outward | 5 5/8″ outswing threshold | Match the outswing profile and seal location to the door assembly. |
| Low raised transition across the opening | 1/4″ or 1/2″ saddle threshold | Check both floor levels, door clearance and the door-bottom seal. Saddle thresholds have fixed heights. |
| More sill coverage is needed | Compatible threshold extenders | Match the extender to the exact threshold profile and width. |
Measure three dimensions: width is the front-to-back sill depth; length runs across the doorway; height is measured from the supporting surface. Threshold height is not automatically the floor-height difference it will bridge.
For exterior doors that open inward. Each option below has a composite base and an adjustable composite cap.
Mill / silver
Dark bronze
Mill / silver
Dark bronze
Mill / silver
Extenders are not available for this threshold.
Shop This OptionDark bronze
Extenders are not available for this threshold.
Shop This OptionDark bronze · walnut composite cap
Dark bronze · walnut composite cap
The drawing is a same-width inswing profile reference from HBP’s standard-cap listing. Confirm exact walnut-cap profile details if needed for a replacement.
Shop This OptionFor exterior doors that open outward. Use the outswing profile to suit the door and weather-seal arrangement.
Mill / silver
Dark bronze
Fixed-height aluminum profiles for low doorway transitions. Check compatibility with the door assembly and bottom seal.
6″: mill or dark bronze; 7″: dark bronze
Profile illustration shows the general saddle shape, not a manufacturing drawing. Accessibility depends on the complete installed doorway and edge transitions.
1/4" x 6" x 72" - Mill/Silver
Shop This Option
1/4" x 6" x 72" - Dark Bronze- Aluminum
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1/4" x 7" x 72"- Dark Bronze- Aluminum
Shop This Option
Mill or dark bronze
Profile illustration shows the general saddle shape, not a manufacturing drawing. Accessibility depends on the complete installed doorway and edge transitions.
Mill / 1/2" x 4" x 36"
Shop This Option
Mill / 1/2" x 4" x 72"
Shop This Option
Dark Bronze / 1/2" x 4" x 36"
Shop This Option
Dark Bronze / 1/2" x 4" x 72"
Shop This Option
Mill / silver
Profile illustration shows the general saddle shape, not a manufacturing drawing. Accessibility depends on the complete installed doorway and edge transitions.
Mill / 1/2" x 6" x 72"
Shop This Option
Mill or dark bronze
Profile illustration shows the general saddle shape, not a manufacturing drawing. Accessibility depends on the complete installed doorway and edge transitions.
Mill / 1/2" x 7" x 36"
Shop This Option
Mill / 1/2" x 7" x 72"
Shop This Option
Dark Bronze / 1/2" x 7" x 36"
Shop This Option
Dark Bronze / 1/2" x 7" x 72"
Shop This Option
Add front-to-back sill coverage for a deeper door frame or wider jamb. First match your existing threshold’s brand and width, then choose the extender width, length and finish.
Compatibility comes first. These extenders fit the matching Endura thresholds sold by HBP. The 4 9/16″ and 5 5/8″ extender families are not interchangeable. Extenders add width; they do not raise the adjustable cap or lengthen the threshold across the doorway.
| Your threshold | Matching extender | Extender widths |
|---|---|---|
| HBP Endura 4 9/16″ inswing | 4 9/16″ threshold family | 2″ or 3″ |
| HBP Endura 5 5/8″ inswing or compatible 5 5/8″ outswing | 5 5/8″ threshold family | 1 3/16″, 2″, 3″, 4 3/8″ or 6 3/8″ |
| 7 13/16″ threshold or aluminum saddle threshold | No matching extender listed in this guide | Choose the required threshold width; do not substitute an extender from another family. |
For an outswing installation, use the matching 5 5/8″ extender family specified on HBP’s outswing threshold pages. Confirm the exact connection profile before ordering.
Choose the finish to match your threshold. Sizes below are extender width × length.
For HBP Endura 4 9/16″ thresholds
For HBP Endura 4 9/16″ thresholds
Choose the finish to match your threshold. Sizes below are extender width × length.
For HBP Endura 5 5/8″ thresholds
For HBP Endura 5 5/8″ thresholds
Need more width? Compare threshold extenders. Match the extender to the exact compatible HBP threshold; do not assume a universal fit.
Need help choosing? Email info@hartfordbuildingproducts.com with your doorway measurements and photos of the existing threshold.
Product details and linked HBP images checked September 23, 2026. Product pages provide current ordering details. Suggested applications depend on the complete door and floor assembly.
