Shopping Cart

Your cart is empty.

Your cart is empty.

Apex™ Door System Adjustable Threshold – 7 5/8' Inswing Sill, Black Cap & Composite Bottom, Mill Finish, 36' Uncut – Energy-Efficient, Weatherproof, and Durable

5.0 Write Review
Free shipping on orders over $29.99

$80.50

$ 36 .99 $36.99

In Stock
  • Adjustable Height for a Perfect Seal – Customizable fit ensures a tight, weatherproof seal to improve energy efficiency and insulation.
  • Heavy-Duty Composite Construction – Built with reinforced composite materials and a durable mill finish, outperforming traditional wood and aluminum thresholds.
  • Seals Out Drafts & Moisture – Blocks cold air, dust, and water, keeping interiors comfortable and energy-efficient.
  • Simple DIY Installation – Designed for easy trimming and customization, with pre-drilled holes for a quick setup.
  • Ideal for Homes & Businesses – A versatile threshold solution suited for residential and commercial entryways.


Product Description

APEX Door System by CTI Flex Series Sills

APEX Door System Inswing Sill

Apex Door System by CTI Exterior Inswing Adjustable Threshold

Flex Series

The Apex Door System by CTI Flex Series Exterior Inswing Adjustable Threshold offers easy installation, adjustable components, and a weathertight design for exterior entryways. With a 36-inch uncut length, it can be trimmed for a custom fit. The sturdy aluminum body and composite cap provide long-lasting performance, while the composite bottom maintains a sealed barrier.

  • Easy Installation
  • Adjustable
  • Weathertight
  • Durable Construction
  • Composite Bottom