Butt up to, or undercut the threshold?


Old 03-24-08, 06:58 PM
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Butt up to, or undercut the threshold?

I'm installing 3.25" solid prefinished oak. I know you're supposed to leave an expansion gap around the edges of the floor so how exactly do you deal with door thresholds such as this one where you don't have the luxury of baseboard trim covering the joint/seam?

Should I undercut the threshold or can I butt the wood up tight to it?

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Old 03-25-08, 04:44 PM
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Looks like a pre-hung door? I'd run right into it. I've done it, ummmm, always. Unless you live in a super humid environment and plan on having it 120 degrees in there, there should be no problems. Oak isn't that unstable. I imagine you will cut door casing to land on your new floor?
Old 03-25-08, 06:44 PM
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Undercut's impossible. How would you lock the pieces?

Unless drill a few holes stairside and tap through those. Ehh.. no.

I'd be looking for a little bit of oak to cover the gap. I kinda agree the gap is hardly necessary.. still I believe butting is bad except at board ends.
Old 03-25-08, 07:08 PM
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I don't like the look of the ends butting up to something, but this will be the side of the board and will look fine - just get it as tight as you can.
Old 03-25-08, 07:38 PM
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Use an endcap molding, sometimes called a baby threshold, or square edge reducer.

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