[SML] Floors again

[Bill Conner]

I can't explain the screws snapping in the floor you worked on previously
if it was plyron, since plyron is simply plywood with 1/8" hardboard outer
plies. Should not different than hardboard on ply you have now.

I did soecify a particular particle board like product on, iirc, 2 stages.
It was a product designed for covering industrial timber floors, in
particular fabric mills.  Very high resistance to steel wheeled casters.
Came predrilled and countersunk.  It broke screws but both places quickly
learned to get better screws, not big box drywall screws, thankfully. Held
paint great.

I'll just add that of the high school stages I've specified plyron for over
20 years, I don't believe any of them have had to replace or recover their
floor.  I don't believe hardwood veneered ply will last that long.

On Sat, Oct 5, 2024, 5:56 PM Jon Ares via Stagecraft <
stagecraft at theatrical.net> wrote:

> All you Plyron folk out there - must be nice to have money, or
> something. In my spaces (19 years and counting) - we have 1/4"
> tempered hardboard over 3/4 or 4/4 plywood (on sleepers, neoprene,
> etc).... This sacrificial top layer has been replaced twice in 19
> years, and is hopefully going to be replaced a third time in the next
> couple of years.  Overall, our stage floors still look great. They get
> one coat of Breakthrough a year, and we do screw into them, as needed.
>
> Eons ago, I was working on a soundstage with a Plyron floor, and
> screws were snapping right and left.  Was not a fan. And didn't envy
> the people in charge of that studio.
>
>  - Jon
>
> On Sat, Oct 5, 2024 at 9:23 AM Bill Conner via Stagecraft
> <stagecraft at theatrical.net> wrote:
> >
> > Well, fwiw, my stage floor top down is 3/4" plyron, 1 1/8" ply  2x4
> sleepers 24" on center, and 3/4" neoprene. I switched from 1/2" plyron
> years ago when I started putting stage edge warning lights in, which are a
> 1/2" deep.  Needed 3/4" top to route 1/2" deep.
> >
> >
> > On Sat, Oct 5, 2024, 11:29 AM Duncan Mahoney via Stagecraft <
> stagecraft at theatrical.net> wrote:
> >>
> >> 3 of our theaters have sprung plywood floors with a top layer of MDF.
> I prefer a top layer thicker than 1/4" if the thickness can be
> accommodated.  Performance has been good, we have only had to replace
> floors after floods.
> >>
> >> I would not want a plywood floor without a top layer of something that
> would not splinter.
> >>
> >> Duncan Mahoney
> >> Technical Director
> >> Professor of Theater Practice in Production
> >> USC School of Dramatic Arts
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>
>
> --
> Jon Ares
> www.arescreative.com
>
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