Building and Construction - plywood subfloor question

Author

plywood subfloor question

Fred

2007-12-22, 9:25 pm

i was looking up at the subfloor from the basement.

it's 23/32" (3/4" plywood) stamped on it and labeled
"underlayment" - what i'm wondering about is, there
are sections of the plywood that appear to have pieces
of it peeled off - and you can see red wood where the
actual layer covering it peeled off.

there's no real consistency to this pattern, and
there are small round sections (maybe 1" or so)..
long sections (about 5-6" in length, maybe 1/2"
wide), some spots in circles..... you get the idea.

these - "conditions" - for lack of a better word,
are only a small percentage of the subfloor - but
i'm wondering if this was a condition of the plywood
that was present when it was installed, - or is it
caused by other factors ?

and - is this something i should be worried about ???
(ie. possible future structural issues)

FYI, the basement is bone dry - i mean BONE dry..
(hyrgrometer measures 16% humidity right now)....
however, during the summer months, the warm summer
air, & cold concrete make for higher humidity (say
around 60-70% on the meter).

Edwin Pawlowski

2007-12-23, 9:25 am

"Fred" <SlateRC@Bedrock.org.net> wrote in message
> it's 23/32" (3/4" plywood) stamped on it and labeled
> "underlayment" - what i'm wondering about is, there
> are sections of the plywood that appear to have pieces
> of it peeled off - and you can see red wood where the
> actual layer covering it peeled off.
>
> there's no real consistency to this pattern, and
> there are small round sections (maybe 1" or so)..
> long sections (about 5-6" in length, maybe 1/2"
> wide), some spots in circles..... you get the idea.
>
> and - is this something i should be worried about ???
> (ie. possible future structural issues)

Normal for that grade of plywood. Nothing to worry about. There is still
plenty of structural strength even with a few missing pieces. There are
standards as to what gaps are allowable. The side you don't see is
smoother.

jloomis

2007-12-23, 9:25 am

When plywood is made and rolled into sheets and glued, a few "straps" of the
paneling gets "glued to the sheet. Some of these get ripped off leaving a
laminate showing.....or glue.......Some of the strips stay on.........in
either case this is not a problem. You can check by walking upstairs also
to see if there is any give inbetween the bays......more likely not.
If it were the case a person could block any of the suspect areas.......
no worry's
jloomis
"Fred" <SlateRC@Bedrock.org.net> wrote in message
news:XfWdnflSqpz7TPDanZ2dnUVZ_uOmnZ2d@comcast.com...
>
> i was looking up at the subfloor from the basement.
>
> it's 23/32" (3/4" plywood) stamped on it and labeled
> "underlayment" - what i'm wondering about is, there
> are sections of the plywood that appear to have pieces
> of it peeled off - and you can see red wood where the
> actual layer covering it peeled off.
>
> there's no real consistency to this pattern, and
> there are small round sections (maybe 1" or so)..
> long sections (about 5-6" in length, maybe 1/2"
> wide), some spots in circles..... you get the idea.
>
> these - "conditions" - for lack of a better word,
> are only a small percentage of the subfloor - but
> i'm wondering if this was a condition of the plywood
> that was present when it was installed, - or is it
> caused by other factors ?
>
> and - is this something i should be worried about ???
> (ie. possible future structural issues)
>
> FYI, the basement is bone dry - i mean BONE dry..
> (hyrgrometer measures 16% humidity right now)....
> however, during the summer months, the warm summer
> air, & cold concrete make for higher humidity (say
> around 60-70% on the meter).
>
>
>

europeanvic

2007-12-26, 5:25 pm

On Dec 23, 10:10=A0am, "jloomis" <jloo...@ocean.net> wrote:
> When plywood is made and rolled into sheets and glued, a few "straps" of t=
he
> paneling gets "glued to the sheet. =A0Some of these get ripped off leaving=
a
> laminate showing.....or glue.......Some of the strips stay on.........in
> either case this is not a problem. =A0You can check by walking upstairs al=
so
> to see if there is any give inbetween the bays......more likely not.
> If it were the case a person could block any of the suspect areas.......
> no worry's
> jloomis"Fred" <Slat...@Bedrock.org.net> wrote in message
>
> news:XfWdnflSqpz7TPDanZ2dnUVZ_uOmnZ2d@comcast.com...
>
>
>
>
>
>
>
>
>
>
>
> - Show quoted text -

There is nothing t worry about.

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