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Old 06-07-2015, 04:06 PM   #1
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Underlayment prep for laminate


Hi. I'm about to replace a 25 year old vinyl tile floor with laminate. Probably Armstrong, http://www.armstrong.com/flooring/pr...nate/armstrong.

How perfect does the underlayment need to be? The existing stuff is 1/4" OSB underlayment. It's in pretty good shape. I cut out and replaced a few soft spots near the door and under the sink. There are a few rough spots where the old adhesive lifted some strands or gouges from a scraper. Do those need to be filled? Or will the pad and floating floor take care of it?
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Old 06-21-2015, 10:02 PM   #2
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I know someone around here has installed this stuff.
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Old 06-22-2015, 07:47 AM   #3
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As long as it's flat and not flexing it will work, any small flaws (EG: hammer dimples, small gouges, seam gaps) will be spanned by the flooring or taken care of by the padding.
Any raised areas such as nail heads, swollen OSB ECT. need to be addressed.
That area in front of the door failing has me concerned, moisture is the enemy of laminate.
Biggest building 101 mistake I see almost daily is building a slab, stoop, deck, even with a doors threshold. Great way to always have water damage to the home.
Proper flashing and adding a jamb sill under the door before it's installed can save thousands of dollars in future damage.
Second most common is someone adding the needed support on the outside wall to support the threshold and using to thick of material and having it stick out beyond the threshold. It acts like a funnel to direct water toward the wall.
And no amount of caulking is going to be a proper fix.
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Old 07-02-2015, 01:42 AM   #4
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Thanks, Joe. Water damage near the door happened years ago, when there was NO threshold. That's been fixed.
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