Shopping for a paint-ready interior door can be confusing, since you can’t see what’s underneath the primer. If a traditional wood door (generally pine or poplar) is what you’re after, you’ll have to special-order it—and expect it to expand and contract with changes in humidity. Here’s how other interior doors are built today.
Five Holes in the Closet Door of an Old House : r/whatisthisthing
Prehung Interior Doors: Installation in 8 Steps - This Old House
Choosing the Right Door - This Old House
Adding Old and Making it New
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Vintage Interior Door Knobs: The Look for Less
Learn how we replaced our interior doors with Woodgrain Doors!
How Doors Are Assembled This Old House
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How to replace a cracked pane of glass in a decades-old door
SOLD Antique 33” Farmhouse Door, c. 1920 - Archived Items, Doors