Crossheads

Urethane Crossheads and Door Headers Built for the Exterior

Wood door headers and window crossheads look great on day one. Over time, moisture infiltration, insect damage, and seasonal movement take their toll, leading to cracked paint, warped profiles, and eventually rot. Our urethane crossheads eliminate that maintenance cycle entirely. The material does not absorb moisture, does not support insect activity, and does not expand and contract the way wood does across seasons. The result is exterior door and window header trim that holds its profile and finish year after year without intervention.

Lightweight Construction That Makes Installation Faster

Working overhead on door and window openings is one of the more physically demanding parts of exterior trim work. Urethane crossheads are significantly lighter than comparable wood profiles, which reduces fatigue, speeds up positioning, and makes single-installer installs more practical. Standard fasteners and exterior-grade adhesive are all you need. No special tools, no heavy lifting, no cutting allowances for expansion gaps.

Decorative Door Headers and Window Crossheads for Every Architectural Style

A well-proportioned crosshead or door header transforms a plain opening into a finished architectural detail. Our decorative door headers and window headers are available in a range of profiles, from clean transitional designs to more traditional and classical configurations, so you can match the trim character of the existing facade without custom millwork lead times or costs. Whether you're specifying exterior door headers on a new build or replacing deteriorated window header trim on a renovation, the right profile is in stock and ready to ship.

Urethane vs. Wood for Exterior Header Trim

Contractors who have specified both materials consistently favor urethane for exterior crosshead and door header applications. Wood requires back-priming, careful caulking at all joints, and periodic repainting to stay ahead of moisture. A single point of failure in the finish, a small crack or an uncaulked joint, can allow water infiltration that leads to rot within a few seasons. Urethane door headers and window crossheads require no back-priming, accept paint normally on the face, and don't create the same moisture vulnerability at joints and end cuts. For exterior applications, urethane is simply a more durable specification.

Exterior Crossheads That Work Across Climates

Our urethane crossheads are weather resistant and insect resistant by nature of the material, not because of a surface treatment that can wear off. That makes them a sound specification in humid southern climates where wood rot and termite damage are constant concerns, as well as in northern climates where freeze-thaw cycles drive paint failure and joint separation in wood trim. Exterior window headers and door headers see some of the harshest exposure on any facade; urethane handles that exposure without requiring the maintenance that wood demands.

Crossheads FAQ:

What is a crosshead and how does it differ from a standard door header? A crosshead is a decorative horizontal trim element installed above a door or window opening. It adds architectural detail to the opening beyond what a plain casing provides. A door header in the structural sense refers to the framing member above the opening. In the trim context, door header and crosshead are often used interchangeably to describe the decorative cap trim above the door or window. Our urethane crossheads and door headers serve the decorative function and are not structural components.

Are your urethane crossheads suitable for exterior installation? Yes. Exterior use is the primary application these are designed for. Urethane is weather resistant, insect resistant, and dimensionally stable across temperature and humidity changes. It will not rot, warp, or crack the way wood can when exposed to moisture and seasonal movement. Our exterior crossheads and exterior door headers are a direct upgrade from wood trim in any climate.

How do you install a urethane door header or window crosshead? Urethane crossheads install similarly to wood trim. Fasten with exterior-grade screws or nails and use a high-quality exterior construction adhesive at the back face for added bond. Fill any fastener holes and gaps with a paintable exterior caulk, then prime and paint to match your existing trim. Because urethane is lightweight, overhead installation above door and window openings is more manageable than comparable wood profiles.

Can urethane crossheads be painted? Yes. Urethane accepts exterior paint normally. Prime the surface with a quality exterior primer before applying your finish coat. Most of our urethane crossheads ship primed or ready to accept paint, but check the individual product page for the finish condition of the specific profile you're ordering.

How do I size a crosshead for my door or window opening? Crosshead width should generally match or slightly exceed the outer width of the door or window casing below it. Profile depth and projection should be proportional to the scale of the opening and the surrounding facade detail. For standard residential door openings, most contractors select a crosshead that projects 1.5 to 3 inches and spans the full casing width with a small overhang on each side. If you're working on a larger opening or a more formal facade, contact us and we can help you match the right profile scale to your application.

Do your urethane crossheads hold up in humid or insect-prone climates? Yes. Urethane does not absorb moisture and does not provide a food source or harborage for insects, including termites. That makes our exterior window headers and door crossheads a particularly strong specification in coastal, Gulf Coast, and southeastern markets where wood rot and termite damage are significant concerns. No additional treatment is needed for these climates.

What is the difference between urethane and wood crossheads? Wood crossheads require back-priming before installation, careful caulking at all joints and end cuts, and periodic repainting to prevent moisture infiltration. A compromised finish on a wood crosshead can allow water behind the trim, leading to rot that often goes undetected until the damage is significant. Urethane crossheads do not have these vulnerabilities. They are lighter, easier to handle, and require no back-priming. For exterior door header and window header applications, urethane is a more durable and lower-maintenance specification than wood.