SILLS & ASTRAGALS
Flex Series Door Sills
Ideal for residential and commercial entryways, the Flex Series Sill offers adjustable, customizable features that fit each doorway's configuration. Choose between in-swing adjustable or out-swing bumper styles to suit your project's unique needs, with a design engineered for a reliable, weather-tight threshold across a wide range of door assemblies. The Flex Series adapts to varying conditions on site, giving pre-hangers and installers the flexibility to achieve a precise, sealed fit in diverse applications.
4 Color Options
4+ Machining Options
10 Year Warranty
Sizes
Out-Swing Bumper
Widths: 4-9/16", 5-5/8", 7-5/8"
Lengths: 2'8", 3'0", 6'0"
In-Swing Adjustable
Widths: 4-9/16", 5-5/8", 7-5/8"
Lengths: 2'8", 3'0", 6'0"
Colors
Aluminum Deck Colors: Mill, Bronze
Extruded Cap Colors: Black, Woodgrain
Substrate Options
Machining and Customization
CTI components are machined in-house to precise, repeatable tolerances and arrive prepped and ready to install.
Available operations include:
Sill Notching
Notched sill ends for a precise fit around the frame
Sill Cutting
Sills cut to your exact opening width, no field trimming
Continuous Sill Configurations
Available for single, double, and triple units, sidelites, and center-hinge applications
Sill Extenders
Widen the sill to fit deeper jamb depths and wall thicknesses
Frequently Asked Questions
What makes the Flex Series Sill adjustable?
The Flex Series Sill offers adjustable, customizable features that fit each doorway's configuration, allowing installers to achieve a precise, weather-tight fit on site.
What styles does the Flex Series Sill come in?
You can choose between in-swing adjustable and out-swing bumper styles to suit your project's needs.
Is the Flex Series Sill suitable for residential and commercial use?
Yes. The Flex Series is designed for reliable performance across a wide range of residential and commercial entryways.
Is this product covered by a warranty?
Yes. Every CTI product carries a 10-Year Manufactured Defect Warranty, ensuring it is free from material and workmanship defects under normal use.
Related Products
Precision Series Door Sills
Offering customizable threshold options, the Precision Series Sills are ideal for various applications with choices like in-swing fixed, out-swing bumper, ADA-compliant saddle, or extender styles.
Door Astragals
CTI's proprietary door astragals seal and secure the meeting point of double doors, delivering enhanced weather resistance and security. Part of the Apex Door System™.
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Technical Details and Resources
Each CTI product comes with a 10 Year Manufactured Defect Warranty, ensuring they are free from material and workmanship defects under normal use for the product's lifetime. This commitment to quality offers you peace of mind and guarantees that you are investing in products built to last. You can view our product-specific warranties below.