Plywood underlayments

Discussion in 'Remodel Forum & Blog' started by prashster, Jun 28, 2006.

  1. prashster

    prashster New Member

    Dec 7, 2005
    Not exactly a plumbing question, but I figure someone will know the answer:

    I'm installing a plywood underlayment (birch 1/4") on which I'm planning to put vinyl plank flooring.

    If the seams of the underlayment panels are gently butted and sanded smooth, do I need to bother with patching the seam with filler?

    Also, what about the staple holes? Do they need to be patched?
  2. Lakee911

    Lakee911 I&C Engineer (mostly WWTP)

    Aug 23, 2005
    I&C Engineer (mostly WWTP)
    Columbus, OH
    If it says to do it, it's better to err on the side of paranoia and fill 'em...and fill 'em good!

    I don't know what 'vinyl plank floor is' but if it's similiar to the vinyl sheet material, then this was done in a manner you describe in my kitchen by a PO---I tore up the floor. In the high traffic areas, you could see every seam.

  3. Sponsor

    Sponsor Paid Advertisement

  4. prashster

    prashster New Member

    Dec 7, 2005
    Vinyl planks are strips - not the big 9 or 12ft sheets. They're laid down individually. Because they have a lot of 'natural' seams I'm not sure how well the underlayment seams will telegraph.

    It's not as simple as just being a matter of overkill. Overfilling the seams and holes can cause pops if the material gets pushed out over time.

    I hope I'm just being paranoid.
  5. eileen123

    eileen123 New Member

    Dec 15, 2009
  6. jimbo

    jimbo Plumber

    Aug 31, 2004
    San Diego, CA
    Even small holes like a staple divot can telegraph through a vinyl floor. I would check with the manufacturer of the vinyl; I suspect their recomendation will be that all holes and seams must be spackled, and sanded smooth.
  7. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona

    Parallel seams may telegraph but not be apparent. However, since your underlayment is probably not as long as the room, there will be cross seams and they WILL telegraph through, especially if there is any deviation between the thicknesses where the two panels meet. I might sand and fill those joints.
Similar Threads: Plywood underlayments
Forum Title Date
Remodel Forum & Blog Bathroom subfloor 1/2" MDO plywood adhesive? Feb 19, 2017
Remodel Forum & Blog Modern version of this plywood? Dec 2, 2013
Remodel Forum & Blog plywood for subfloor questions Mar 6, 2012
Remodel Forum & Blog 5/8" plywood subfloor for engineered hardwood--thick enough? and for a tile entry? Jul 20, 2010
Remodel Forum & Blog Wolmanized (pressure-treated) Plywood inside residential areas? Feb 24, 2010

Share This Page