4 Substrate Options
12+ Machining Options
10 Year Warranty
SIZE
- Thicknesses: 1-1/4"
Lengths: 6/8, 8/0, 16/0, 2/8, 3/0, 14/0
Widths: 4 1/8", 4 9/16", 4 7/8", 5 1/4", 6 9/16", 6 7/8", 7 1/4", 9 1/4"
COLORS
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Crafted from high-performance substrates, CTI exterior door frames resist warping, rotting, and moisture damage at the most vulnerable part of the opening, keeping doors square, sealed, and secure through years of weather exposure. Frames are available in multiple substrate options to match performance requirements and price points, including ProtecDoor™ composite, with its four-inch rot-resistant bottom; SuperComp™ PVC, for coastal and high-moisture environments; and primed finger-jointed wood. With a full range of widths and lengths and complete in-house machining, including dado cutting, pre-drilling, hinge and strike prep, and weatherstrip application, CTI frames arrive prepped and ready to hang as a core component of the Apex Door System™.
Exterior Door Frames
FRAMES
Substrate Options
Pine
Pine is known for its versatility and workability. It offers excellent strength and stability, making it ideal for a wide range of construction and millwork applications.
SuperComp™ Smooth
SuperComp™ Smooth offers a sleek and modern look to PVC products. It is highly durable, resistant to moisture and rot, and requires minimal maintenance.
SuperComp™ Textured
SuperComp™ Textured delivers the look of natural woodgrain with PVC’s low-maintenance durability.
Machining and Customization
CTI exterior frames are machined in-house and arrive prepped and ready to hang, moving customization upstream so your team spends less time on the bench and more time producing finished doors.
20M LABELING
20-minute fire-rating labels applied.
20M STAMP
20-minute fire-rating stamp applied.
RIPPED TO SIZE
Ripped to your required width for a precise fit.
CONTINUOUS HEAD MACHINING
Uniform prep across wider or multi-unit openings.
TRIPLE STRIKE MACHINED
Three strike preps for multi-point hardware.
WEATHERSTRIP APPLICATION
Weatherstrip installed at the mill.
DOUBLE STRIKE MACHINED
Two strike preps for double-door configurations.
STRIKE MACHINED
Strike prep positioned for accurate latch alignment.
HINGE MACHINED
Hinge locations routed and prepped to spec.
CUSTOM LENGTH
Cut to your exact length, no field cutting.
PRE-DRILL HEAD AND SILL DADO
Pre-drilled locations for faster, consistent assembly.
HEAD SIL AND DADO
Precise dado cuts for a tight frame joint.
Available operations include:
Frequently Asked Questions
CTI frames are machined in-house and arrive ready to hang. Available operations include head and sill dado, pre-drilling, hinge and strike prep (single, double, or triple strike), custom length, ripping to size, continuous head machining, weatherstrip application, and 20-minute fire-rating stamping and labeling.
What machining and prep options are available for exterior frames?
Yes. Weatherstrip application is available as an in-house machining option, so frames arrive with weatherstrip already installed rather than requiring a separate step at your facility.
Can CTI exterior frames be ordered with weatherstrip pre-installed?
SuperComp™ PVC is the preferred choice for coastal, humid, and high-moisture environments. Because PVC does not absorb water, rot, or decay, it delivers low-maintenance, long-term durability where exterior wood frames are more likely to fail over time.
When should I choose SuperComp™ PVC over a wood substrate?
ProtecDoor™ pairs a finger-jointed pine body with a four-inch composite rot-resistant bottom. That composite section sits at the base of the frame, the zone closest to the threshold where water pools and wicks upward, resisting moisture and decay while the pine body above retains the workability of natural wood.
What makes ProtecDoor™ frames resistant to rot?
CTI exterior frames are offered in four substrates: Pine, LVL, SuperComp™ PVC, and ProtecDoor™. Each suits a different balance of performance, environment, and price point, from workable natural wood to low-maintenance PVC and rot-resistant composite. Contact our team to determine the right fit for your program.
What substrates are CTI exterior door frames available in?
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.