A 72-inch threshold can help seal a wide exterior doorway, but the right choice depends on more than length. Before buying, measure your opening and check the threshold’s width, height, shape, and seal. French doors also need a good fit around the center meeting point, so confirm that the sill works with your door system rather than relying on the 72-inch measurement alone.
Table of Contents
Quick Comparison
| Product | Key Details | Best For |
|---|---|---|
| Blulu 72-Inch Aluminum Swing Threshold | 5 5/8 inches wide; aluminum with a PVC insert | A wide exterior sill with a built-in seal |
| Blulu 72-Inch Adjustable Aluminum Threshold | 5 5/8 inches wide; aluminum with a vinyl seal | Shoppers considering a Blulu swing threshold |
| Barzen 72-Inch Aluminum Threshold Strip | 5 inches wide; 1/4-inch height; pre-drilled holes | A low-profile transition strip |
| KC Hardware Adjustable Aluminum Threshold | Adjustable design; product details do not specify a 72-inch length | People seeking an adjustable-height option |
| KC Hardware Aluminum Door Threshold | 72-inch length option; 4 inches wide and 1/2 inch high | A straightforward metal sill or transition |
Our Picks: Best 72 Inch French Door Threshold reviews
1. Blulu 72-Inch Aluminum Threshold with PVC Seal
This Blulu threshold is designed for exterior doorways and measures 72 inches long by 5 5/8 inches wide. Its aluminum body provides the main sill surface, while a built-in PVC insert is intended to help limit drafts, rain, wind, dust, and pests. That combination makes it a practical option to consider for a wide French door opening exposed to the outdoors.
The wide profile is worth checking against your existing sill and door sweep before ordering. A threshold that is the right length can still be a poor fit if its width or height does not match the doorway. The product description says to check the door size, but does not provide a height measurement, so confirm that detail with the listing or seller if your installation depends on it.
Compared with the Barzen strip and the KC Hardware transition, the Blulu has a built-in sealing insert rather than a simple low-profile metal transition. It may suit you if weather sealing is a priority, but the listing does not establish that it fits every French door profile or seals the center meeting point between the doors.
Pros:
- 72-inch length is specified.
- Wide 5 5/8-inch profile.
- Aluminum construction with a built-in PVC insert.
- Designed for exterior threshold use.
Cons:
- Product details do not specify the threshold height.
- You need to check the fit with your door sweep and French door sill.
Verdict: Choose this Blulu model if you need a 72-inch-wide exterior sill with an integrated seal and have verified its profile will fit your doorway.
2. Blulu 72-Inch Swing Threshold with Vinyl Insert
This second Blulu option is also listed as 72 inches long and 5 5/8 inches wide. Its description calls it an outdoor swing threshold and specifies an aluminum body with a built-in vinyl seal. The seller describes the insert as helping keep out weather and debris while reducing heating and cooling loss.
Its dimensions and sealing design are very similar to the first Blulu pick. The title calls this one adjustable, but the product details provided do not explain what adjusts or give an adjustment range. Do not assume it offers height adjustment without checking the current listing. If the two models are otherwise alike, compare their current specifications and included installation details before choosing.
For a French door, pay particular attention to the sill’s full width and how it meets the door bottoms and center seam. This product is described for exterior thresholds generally; its information does not confirm compatibility with a particular French door brand or configuration.
Pros:
- 72-inch length and 5 5/8-inch width are specified.
- Aluminum construction is suited to exterior use.
- Built-in vinyl insert is intended to help block drafts and weather.
- Described as an outdoor swing threshold.
Cons:
- The claimed adjustable feature is not explained in the supplied details.
- Height and French door compatibility are not specified.
Verdict: This is a reasonable option to compare with the other Blulu threshold, but verify what “adjustable” means and confirm the sill dimensions before ordering.
3. Barzen 72-Inch Low-Profile Aluminum Threshold Strip
Barzen’s aluminum strip measures 5 inches wide by 72 inches long, with a listed height of 1/4 inch. It is a lower-profile alternative to the deeper Blulu thresholds, and the seller describes it as a transition for interior or exterior doorways. Pre-drilled holes are included in the design, and the strip can be cut to length with a hacksaw according to the product details.
The shallow height may be useful when you want a modest transition between floor surfaces, but this is not the same style as a tall sill with a built-in weather seal. The listing describes a non-skid structure and says the product is ADA-compliant; confirm the exact installation and applicable access requirements for your project rather than relying on a product description alone.
This model is listed as unavailable in the supplied product information, so check its current status before planning an installation around it. If you need a threshold that helps seal against weather, the Blulu options include a specified insert; if you mainly need a low transition strip, the Barzen dimensions may be more relevant.
Pros:
- 72-inch length and 5-inch width are specified.
- Low 1/4-inch listed height.
- Pre-drilled holes are described for installation.
- Product details say it can be trimmed with a hacksaw.
Cons:
- Listed as unavailable in the supplied product information.
- No built-in weather-sealing insert is specified.
Verdict: Consider the Barzen if a low-profile metal transition is what your doorway needs, but check availability and do not treat it as a direct substitute for a sealed exterior sill.
4. KC Hardware Adjustable Aluminum Threshold for Fit Flexibility
This KC Hardware threshold is a black aluminum model with an adjustable design and hidden screws. Its description gives an adjustment range of 1 3/8 to 1 5/8 inches and also mentions a 5-inch slope. It is presented as an option for exterior and interior doors, with a design intended to help create a close fit and limit drafts or moisture.
The major limitation for this roundup is that the supplied product details do not state a 72-inch length. They also include several dimensions and performance claims that do not clearly establish the complete fit for a particular doorway. Measure carefully and confirm the available length, width, and adjustment range on the current listing before considering it for a French door opening.
Unlike the fixed-length options here, its appeal is the stated adjustability and hidden-screw look. That may make it worth investigating when you need to fine-tune threshold height, but it is not a dependable 72-inch recommendation until you verify the size. A close sill fit also does not, by itself, guarantee a seal between a pair of French doors.
Pros:
- Aluminum construction and black finish.
- Described as adjustable, with an adjustment range provided.
- Hidden-screw design is intended to give a cleaner appearance.
- Designed for exterior and interior doorways.
Cons:
- A 72-inch length is not specified in the supplied details.
- Some listed dimensions need clarification before purchase.
Verdict: Pick this only if its verified length and dimensions match your opening; based on the available details, it is an adjustable alternative rather than a confirmed 72-inch choice.
5. KC Hardware 72-Inch Aluminum Door Threshold
This aluminum threshold is offered in several lengths, including 72 inches. The listed profile is 4 inches wide and 1/2 inch high. The seller describes it as a metal transition for interior or exterior doorways, with a role in supporting the door and helping reduce drafts and moisture.
Its dimensions make it a simpler, narrower alternative to the 5 5/8-inch Blulu models. That may be a closer match if your existing sill is about 4 inches wide, but the product description does not mention a built-in insert or adjustable height. Check the 72-inch option and the threshold’s cross-section against your current sill before ordering.
The supplied product data identifies the brand as CBW Doors while the title names KC Hardware. Confirm the current listing details if the brand or included hardware matters to you. As with the other options, a threshold’s length alone cannot confirm that it will seal a French door’s bottom edge or center meeting point.
Pros:
- A 72-inch length option is specified.
- Listed dimensions are 4 inches wide and 1/2 inch high.
- Aluminum design can serve as a door sill or floor transition.
- Available in multiple listed lengths.
Cons:
- No built-in sealing insert or height adjustment is specified.
- Brand information differs between the supplied title and product data.
Verdict: This is a practical option when a 4-inch-wide, 1/2-inch-high aluminum threshold matches your existing sill and you do not need an integrated seal.
How to Choose a 72-Inch French Door Threshold
Measure the Opening and Existing Sill
Measure the width of the threshold area, not just the door slab, and compare it with the listed product length. Then measure the sill’s front-to-back width and height. The options here range from 4 inches to 5 5/8 inches wide, with very different height details. A correct length does not make up for a threshold that is too wide, too narrow, or too tall for your door and floor.
Check the French Door Configuration
French doors can have different sill shapes, door bottoms, and center meeting points. Confirm how the two door panels close over the threshold and whether the existing frame uses a specific sill profile. The product information here does not confirm compatibility with particular French door models, so compare measurements and installation details with your door manufacturer or installer when needed.
Decide Whether You Need a Weather Seal
A plain aluminum transition and an exterior threshold with a vinyl or PVC insert serve different needs. The Blulu models include a built-in insert intended to help block drafts and weather. The Barzen and KC Hardware strip descriptions do not specify a similar insert. If you are replacing a threshold because of drafts or water, look closely at the seal design and how it will meet the bottom of your doors.
Match the Height to the Door Sweep and Floor
Threshold height affects how the door closes and how smoothly people move across the doorway. Compare the sill height with the door sweep, flooring, and any existing step or transition. The Barzen is listed at 1/4 inch high, while the KC Hardware strip is listed at 1/2 inch high. The Blulu product details supplied here do not give a height, so verify it before purchase.
Consider Material, Finish, and Exposure
All five choices use aluminum, but their designs differ. Some include a seal, while others are simple transition strips. Consider whether the threshold will face rain, frequent foot traffic, or a strong difference between indoor and outdoor floor levels. Check the finish and product instructions for your installation conditions, since the supplied details do not establish that every option suits every climate or doorway.
Review Installation and Trimming Needs
Check whether the product has pre-drilled holes, what fasteners or tools are needed, and whether the length can be trimmed. The Barzen description specifically says it can be cut with a hacksaw and has pre-drilled holes. Do not assume those features apply to the other models. If you need to modify a threshold, confirm that doing so will not damage its seal or compromise the fit.
Frequently Asked Questions
Will any 72-inch threshold fit a French door?
No. Length is only one part of the fit. You also need to match the sill width, height, profile, door sweep, and the way the paired doors meet at the center. Check the product dimensions against your existing threshold before buying.
Which option has a built-in weather seal?
The two Blulu thresholds are described as having a built-in PVC or vinyl insert. The supplied details for the Barzen and KC Hardware strip models do not specify an integrated insert.
Are both Blulu thresholds the same?
Their listed length, width, aluminum construction, and insert are similar. One title calls its model adjustable, but the supplied description does not explain an adjustment range. Verify that feature on the current listing before treating it as a key difference.
Can the Barzen threshold be cut to fit?
Its product description says it can be cut to length with a hacksaw. Check the installation directions and measure carefully before cutting. The supplied information does not state that the other models can also be trimmed.
Is the KC Hardware adjustable threshold 72 inches long?
The supplied product details do not give its length. Confirm the available size on the current listing before considering it for a 72-inch opening.
Which option is best for a low transition?
The Barzen strip has a listed height of 1/4 inch, making it the lowest-profile option in this comparison based on the supplied dimensions. It does not have a specified built-in weather seal, so it may not suit a doorway where sealing is the main concern.
What should I check before ordering?
Measure the opening, sill width, and sill height. Check how the threshold meets the door bottoms and center seam, confirm whether you need a built-in seal, and review the current listing for length, installation details, and availability.
Final Recommendation
For a 72-inch exterior doorway where weather sealing matters, the Blulu aluminum thresholds are the strongest fit in this group based on their specified length, wide profile, and built-in insert. The Blulu models are similar, so verify the claimed adjustability of the second option before choosing between them. If you need a low-profile transition, consider the Barzen dimensions, while the KC Hardware strip may suit a doorway that calls for a 4-inch-wide sill. In every case, measure your French door setup carefully: none of the supplied product details confirms a universal fit for all French doors.
