Pemko 253FG Series Thermal Bar...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$98.19
$92.28
Pemko 253FG Series Thermal Barrier Threshold with Frost Guard 6-1/8" Half Saddle Design

Pemko 253FG Series Thermal Barrier Threshold with Frost Guard 6-1/8" Half Saddle Design

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Model: 253 x 3AFG 36
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$98.19
$92.28
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Pemko 253FG Series Thermal Barrier Threshold with Frost Guard 6-1/8"; Half Saddle Design

Professional Thermal Barrier Door Threshold Solution

The Pemko 253FG Series Thermal Barrier Threshold delivers superior energy efficiency with its innovative frost guard design and rigid polypropylene thermal break technology. This 6-1/8"; threshold features a versatile 3"; half saddle configuration with optional 1-1/4"; w x 7/8"; h bumper seal, available in aluminum, brass, and stainless steel base materials. The integrated polypropylene key between extrusions minimizes hot and cold temperature transfer while providing ADA accessibility when butted to a 1/2"; offset.

Professional Features & Benefits

  • Thermal Break Technology: Rigid polypropylene key between extrusions provides effective thermal break, significantly reducing heat and cold transfer to lower energy usage.
  • Versatile Configuration Options: 3"; half saddle portion with choice of additional half saddle in various widths or 1-1/4"; w x 7/8"; h bumper seal with Pile Brush (P), Eco-V (V), or ThermoSeal (T) insert options.
  • Premium Material Options: Available in aluminum, brass, and stainless steel base materials for durability and aesthetic flexibility in commercial applications.
  • Frost Guard Protection: Integrated frost guard feature provides extra weather protection and enhanced thermal performance.
  • Flexible Installation: Non-welded threshold design allows 3/8"; door clearance and works with surface applied vertical rod exit devices or as door bottom stop and seal.
  • Custom Configuration Capability: Can be combined with other half saddles to create custom size and configuration saddles for specific application requirements.
  • ADA Compliance Ready: Achieves ADA accessibility when properly butted to a 1/2"; offset installation.
  • Professional Fastening: Standard WS #10 x 1.5"; wood screws included with other fastener options available for various substrate types.

Technical Specifications

  • Department: Door Hardware
  • Product Category: Door Trim and Accessories
  • Product Dimension: H: 6-1/8";
  • Product Group: Door Trim and Accessories
  • Product Model: 253FG
  • Product Subgroup: Door Thresholds
  • Product Type: Commercial Thresholds
  • Series: 253FG Series
  • Subcategory: Thresholds

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose Pemko Quality?

Pemko 253FG Series thresholds deliver professional-grade thermal performance with rigid polypropylene thermal break technology and premium base material construction in aluminum, brass, and stainless steel options. The frost guard design and versatile configuration options provide reliable weather protection and energy efficiency for demanding commercial applications where thermal performance and durability are essential.

Product Specs

Subcategory:
Thresholds
Product Group:
Door Trim and Accessories
Product Subgroup:
Door Thresholds
Product Type:
Commercial Thresholds
Product Model:
253FG
Product Dimension:
H: 6-1/8"
Product Category:
Door Trim and Accessories
Department:
Door Hardware
Series:
253FG Series

Pemko 253 x 3AFG 36 – Frequently Asked Questions

1) Will the Pemko 253FG threshold meet ADA requirements at an exterior door?
The 253FG meets ADA accessibility when it is butted to a 1/2 inch offset. That is the condition stated for the threshold, so the adjoining floor or slab condition is what makes the installation compliant, not the threshold alone. Plan the offset into the opening before you set it.
2) How much door clearance does the Pemko 253FG half saddle threshold need under the door?
It is a non-welded threshold that allows 3/8 inch door clearance. That clearance also lets it work under surface applied vertical rod exit devices, or serve as a door bottom stop and seal.
3) Does the 253FG threshold come with a seal, or do I order the insert separately?
The 3 inch half saddle portion can be paired with an additional half saddle in various widths, or with a 1-1/4 inch wide by 7/8 inch high bumper seal. If you take the bumper seal route, the insert is a choice: Pile Brush (P), Eco-V (V), or ThermoSeal (T). Specify the insert code with the order, since the three behave differently on sweep friction and weather sealing.
4) I have a pair of doors with surface vertical rod exit devices. Will this threshold work with the bottom rods?
It will. The 253FG is a non-welded design specifically noted to work with surface applied vertical rod exit devices, and its 3/8 inch door clearance leaves room for the bottom rod and latch to operate. Order the 72 inch length for a pair of 3 foot leaves.
5) What finishes does the Pemko 253FG thermal barrier threshold come in?
Two aluminum finishes are stocked: mill finish aluminum and dark bronze anodized aluminum, each in 36, 48, and 72 inch lengths. Mill finish is the standard clear look for most commercial openings; dark bronze anodized matches bronze storefront and dark painted frames. The 253FG design is also offered on brass and stainless steel base material.
6) What does the thermal break in the 253FG actually do, and when is it worth it over a plain saddle threshold?
A rigid polypropylene key sits between the two aluminum extrusions, so the interior half is not in metal-to-metal contact with the exterior half. That cuts heat and cold transfer through the threshold and reduces condensation and frosting at the sill, which is why it carries the frost guard designation. On a conditioned exterior opening in a cold climate, that is the reason to choose it. On an interior opening or a vestibule where both sides are conditioned, a plain saddle threshold does the same job for less hardware.
7) What fasteners ship with the Pemko 253FG, and will they work on a concrete sill?
Standard supply is WS #10 x 1-1/2 inch wood screws. Those are for wood substrates. Other fastener options are offered for different substrates, so on concrete or a steel sub-sill you need to call out the matching fastener rather than use what comes in the box.
8) Can I build a wider threshold out of the 253FG for a deep sill?
Yes. The 253FG is a half saddle and can be combined with other half saddles to make a custom width and configuration. That is how you cover a sill deeper than the 6-1/8 inch profile without going to a special extrusion.
How fast can I get the Pemko 253 x 3AFG 36 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Pemko 253 x 3AFG 36 come with a warranty?
Absolutely. The Pemko 253 x 3AFG 36 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Pemko 253 x 3AFG 36?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Pemko 253 x 3AFG 36 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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