FRAMES
Mull Posts
CTI mull posts enhance the structural integrity of door and window assemblies, adding stability and support where units join. Produced in the same substrate options as our frames, including ProtecDoor™, SuperComp™, and primed wood, and available with pre-drilling and haunch cuts through the Apex Door System™, mull posts reinforce multi-unit configurations for a solid, lasting installation. Machined to precise tolerances, they integrate cleanly with frames and brickmold to complete a coordinated, high-performance exterior door package.
4 Substrate Options
7 Machining Options
10 Year Warranty
Sizes
Thicknesses: 1", 1 1/2", 2 1/2"
Lengths: 6/8, 8/0
Widths: 3 9/16", 4 3/8", 4 9/16", 6 9/16"
Colors
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.
ProtecDoor™
ProtecDoor™ features pine FJ wood with a four-inch PVC rot-resistant bottom, designed to withstand harsh environments while maintaining structural integrity.
Machining and Customization
CTI components are machined in-house to precise, repeatable tolerances and arrive prepped and ready to install.
Available operations include:
Hinge Machined
Hinge locations routed and prepped to spec.
Strike Machined
Strike prep positioned for accurate latch alignment.
Frequently Asked Questions
What are mull posts used for?
Mull posts enhance the structural integrity of door and window assemblies, adding stability and support where units join.
What substrates are mull posts available in?
Mull posts are produced in the same substrate options as CTI frames, including ProtecDoor™, SuperComp™, and primed wood.
Can mull posts be pre-drilled?
Yes. Mull posts are available with pre-drilling and haunch cuts through the Apex Door System™ for a solid, coordinated installation.
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
Exterior Door Frames
CTI exterior door frames resist warping, rot, and moisture damage, keeping your doors secure and sealed through all weather conditions.
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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.