Interior Header Boards for Door and Window Trim

Base Board
Casing
Crown
Header
Shiplap
Trim

Interior Header Boards for Trim Assemblies

Header boards are flat trim components installed above doors and windows, commonly used in craftsman, modern, and flat-trim interior designs. This category includes interior header boards designed to integrate with casing and other trim elements for clean, structured openings.

1" x 6" Flat Header - Knotty Alder - 10' Actual Dimensions: 120 in x 6 in x 1 in * Actual Dimensions are listed as (Length x Width x Height/Thickness) * $ 38.30 38.300000000000004 USD	1x4 Flat Header - MDF - 12' Actual Dimensions: 144 in x 3-1/2 in x 1 in * Actual Dimensions are listed as (Length x Width x Height/Thickness) * $ 24.70 24.7 USD	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) * $ 21.60 21.6 USD	1x6 Flat Header - MDF - 16' Actual Dimensions: 192 in x 5-1/2 in x 1 in * Actual Dimensions are listed as (Length x Width x Height/Thickness) * $ 28.95 28.95 USD
1x8 Flat Header - MDF - 16' Actual Dimensions: 192 in x 7-1/4 in x 1 in * Actual Dimensions are listed as (Length x Width x Height/Thickness) * $ 43.40 43.4 USD	C390 Header - MDF - 16' Actual Dimensions: 192 in x 4-3/16 in x 1-1/4 in * Actual Dimensions are listed as (Length x Width x Height/Thickness) * $ 49.85 49.85 USD	C392-6 Header - MDF - 16' Actual Dimensions: 192 in x 6 in x 1-1/4 in * Actual Dimensions are listed as (Length x Width x Height/Thickness) * $ 73.70 73.7 USD