1x4 Flat Header - MDF - 16'
Actual Dimensions: 192 in x 3-1/2 in x 1 in
* Actual Dimensions are listed as (Length x Width x Height/Thickness) *
Modern 1x4 Flat MDF Header for Clean Door and Window Trim
Complete your interior with the clean, timeless style of our 1x4 Flat Header. Manufactured from premium paint-grade MDF, this 3-1/2-inch flat header provides crisp architectural lines that enhance doors and windows while maintaining the simple, minimalist look that's become a hallmark of modern interior design.
Whether you're building a new home, remodeling an existing space, or replacing outdated trim, this flat header creates a refined, custom appearance without excessive ornamentation. It pairs beautifully with flat casing, shaker doors, and modern baseboards to create a cohesive trim package throughout your home.
Available in 16-foot lengths, it reduces seams for a smoother installation and a more professional finished result.
Why Choose a 1x4 Flat Header?
Flat header moulding is a simple upgrade that makes doors and windows look more intentional and architecturally refined.
Features & Benefits
- Clean 1x4 flat profile
- Premium paint-grade MDF construction
- Smooth, knot-free surface
- Modern 3-1/2" profile
- Long 16-foot boards reduce seams
- Easy to cut, install, and paint
- Creates crisp architectural lines
- Ideal for remodeling and new construction
- Coordinates with flat casing and flat baseboards
Its streamlined design complements today's most popular home styles while remaining timeless enough to never go out of fashion.
Why Homeowners Choose Flat Header Moulding
Flat headers help create a clean, designer-inspired appearance that's both functional and beautiful.
They are popular because they:
- Upgrade builder-grade trim
- Add definition above doors and windows
- Complement shaker-style doors
- Pair perfectly with flat stock trim
- Create a cohesive modern trim package
- Work in both large and small rooms
- Enhance contemporary and transitional interiors
The result is a polished finish that looks custom without feeling overly decorative.
Why Choose MDF?
Medium Density Fiberboard (MDF) is one of the best materials for painted trim because of its consistency and smooth finish.
Benefits include:
- Smooth paint-ready surface
- No knots or visible grain
- Excellent paint adhesion
- Uniform profile throughout every board
- Easy to machine and install
- Crisp square edges
- Professional-quality painted finish
For painted trim packages, MDF provides dependable performance and exceptional results.
Perfect For
The 1x4 Flat Header is ideal for:
- Interior door headers
- Window headers
- Home remodeling
- New home construction
- Modern homes
- Contemporary interiors
- Modern farmhouse designs
- Scandinavian-inspired homes
- Transitional interiors
- Home offices
- Bedrooms
- Whole-home trim packages
Product Specifications
Product: 1x4 Flat Header
Material: MDF
Length: 16'
Actual Dimensions: 192 in. × 3-1/2 in. × 1 in.
(Length × Width × Height/Thickness)
Application: Interior door and window header moulding
Finish: Paint-grade
Frequently Asked Questions
What is a flat header?
A flat header is a square-edged moulding installed above doors or windows to create a clean, modern architectural appearance. It provides visual definition while maintaining simple, uncluttered lines.
Why choose a 1x4 flat header?
A 1x4 flat header offers a subtle, balanced look that's ideal for standard-height ceilings and homeowners who want modern trim without oversized moulding. It's an excellent choice for both remodels and new construction.
Can this header be painted?
Yes. This 1x4 Flat Header is manufactured from paint-grade MDF and is designed for a smooth, durable painted finish.
What design styles work best with flat headers?
Flat headers complement modern, contemporary, Scandinavian, transitional, Craftsman, and modern farmhouse interiors. They pair especially well with shaker doors and flat casing.
Why are 16-foot lengths beneficial?
Longer boards reduce the number of seams needed during installation, helping create cleaner lines and a more professional finished appearance.
Complete Your Interior Trim Package
Pair the 1x4 Flat Header with matching 1x4 or 1x6 flat casing, flat baseboards, shaker interior doors, crown moulding, and other coordinating trim profiles to create a cohesive modern interior. Matching flat trim throughout your home delivers a clean, designer-inspired appearance that adds lasting beauty and value.
Why Buy Interior Moulding from CR Doors?
CR Doors provides premium interior doors, moulding, stair parts, and architectural millwork for homeowners, builders, contractors, and designers. Whether you're finishing a single room or an entire custom home, our experienced team can help you select coordinated trim products that combine exceptional craftsmanship with timeless design.