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Backyard Theater - Outdoor Movies

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Author Topic: Layering Poly tarp... any benefit?  (Read 6600 times)
Lurch
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« on: June 24, 2008, 12:24:39 pm »

went ahead and got a poly tarp from creative shelters along with all of the frame fittings.  I have the billboard vinyl, too, but this had grommets in all the way around which makes it much easier to tighten down.  Major difference between the poly and the vinyl was the drop in reflection.  Any thoughts on if stacking two of these together would improve that?  Not sure of the physics involved
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Stinky Cat Theater
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« Reply #1 on: June 24, 2008, 12:37:32 pm »

went ahead and got a poly tarp from creative shelters along with all of the frame fittings.  I have the billboard vinyl, too, but this had grommets in all the way around which makes it much easier to tighten down.  Major difference between the poly and the vinyl was the drop in reflection.  Any thoughts on if stacking two of these together would improve that?  Not sure of the physics involved

I do not know about the bill board Vinyl, but the Creative Shelters Tarp I use does let some light pass.  There may be an off chance some light will reflect back and ghost or give some light effects.

Also if it is too loose on the frame by its self it'll be too loose along with the other screen.  It may flap around and smack on the tighter screen making noise and a wavy surface.  Even in very light wind.

Finally, it seems like an unnecessary step.  You're better off choosing one or the other and making it work.
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If the above response seems like BS, it probably is.  The only thing you need to know is that an ample supply of good beer will make every thing turn out just fine.
Lurch
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« Reply #2 on: June 24, 2008, 02:41:59 pm »

What brought it to mind was how visible the seam is on the creative shelter tarp.  The overlap is actually the best projection surface, but it stands out compaired to the rest of the tarp.


* DSC00211 (Medium).JPG (45.54 KB, 800x600 - viewed 687 times.)
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TDubbs
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« Reply #3 on: June 24, 2008, 09:09:19 pm »

R U kidding me.
Is the creative shelter tarp's seam that noticable?
I just bought one a day ago (10 x 20) and it's in transit as we type.

Do I have to upgrade already - before my first showing ever?

Todd
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Lurch
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« Reply #4 on: June 24, 2008, 10:00:56 pm »

R U kidding me.
Is the creative shelter tarp's seam that noticable?
I just bought one a day ago (10 x 20) and it's in transit as we type.

Do I have to upgrade already - before my first showing ever?

Todd

The sun goes down behind my screen.  I think that contributed to how much it stood out in the pic.  As it got darker it became less noticable, but it's certainly there.

[edit to add] as it got darker, that I didnt tie down each grommet became the more obvious problem as seen here


* DSC00212 (Medium).JPG (27.08 KB, 800x600 - viewed 700 times.)
« Last Edit: June 24, 2008, 10:04:11 pm by Lurch » Logged
Sparge
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« Reply #5 on: June 25, 2008, 12:05:22 am »

Is the creative shelter tarp's seam that noticable?

I have the Creative Shelters tarp, too.  Yes, it is noticeable but mostly to people who are looking for it.   Lips Sealed  For instance, I notice it but I've never had anyone else mention it at any showing.

It's about a one-inch wide horizontal seam where the two pieces of vinyl are joined together.  This one-inch double-ply section does reflect a little more light.  If you look at it from the rear that strip is a little darker (the exact and expected opposite).  I doubt this phenomenon is unique to the Creative Shelters tarp.  The only way around it is likely a one-piece tarp (hard to find in 10x20 size) or billboard vinyl.

I have to agree that layering (unless you're gluing the layers tightly and evenly together) will likely reduce the contrast due to random reflection angles and minute changes in focal depth.  I say leave it alone!

-Sparge-
« Last Edit: June 25, 2008, 12:07:35 am by Sparge » Logged
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