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sintra thickness

post #1 of 63
Thread Starter 
What thickness sintra do I need if I'm mounting it on a 1"x2" frame with 2-3 internal braces? The overall dimensions will be 96"x41".

Thanks,
Darrell
post #2 of 63
3mm.

6mm does not need framing.
post #3 of 63
Darrell

while you can get by with the 3mm... definitely go with the 6mm.

reason is... with the 3mm, if you are not careful in making sure it is taute from end to end... you could experience a bowing in the center where you will not be adhering, stapling, or screwing anything to the vertical center bracing.
post #4 of 63
+1

most people do use 6mm. also saved on framing cost.
post #5 of 63
Thread Starter 
Thanks for the feedback. I'm using a frame in either case so I can have 2 cleat positions in the back to adjust for CIH zooming without vertical lens shift.

-Darrell
post #6 of 63
Maxx, I know you already answered this in my other thread, but I was under the impression that 3mm simply didn't work with frames. My frame cost way more than I thought it would (~$100) and I'm trying to save now. If I am careful to tighten it, would 3mm be just fine? Or is it going to be much more difficult to make it work. I can scrounge for another $30, but id like to avoid that if I can, being a poor college student and all. :P
post #7 of 63
Quote:
Originally Posted by Frosteh View Post

Maxx, I know you already answered this in my other thread, but I was under the impression that 3mm simply didn't work with frames. My frame cost way more than I thought it would (~$100) and I'm trying to save now. If I am careful to tighten it, would 3mm be just fine? Or is it going to be much more difficult to make it work. I can scrounge for another $30, but id like to avoid that if I can, being a poor college student and all. :P

yep you can make it work. start with the frame completely vertical. screw in the top from the center to the outward... making sure you do not rachet in the screws (as doing so may causing warp/buckling). when you get to the sides and bottom...

then do the sides from top down. to make the screen taute... screw the screw half way in, then back out just enough to release from the frame, but is still in the sintra. now use the screw to tension the sintra and screw in.

and finally do the same with the bottom.
post #8 of 63
Thread Starter 
Is the 6mm sintra more difficult to ship/transport than 3mm? If I buy it locally, I'll need to be able to roll it up to get it in the car.
post #9 of 63
Quote:
Originally Posted by pb_maxxx View Post

yep you can make it work. start with the frame completely vertical. screw in the top from the center to the outward... making sure you do not rachet in the screws (as doing so may causing warp/buckling). when you get to the sides and bottom...

then do the sides from top down. to make the screen taute... screw the screw half way in, then back out just enough to release from the frame, but is still in the sintra. now use the screw to tension the sintra and screw in.

and finally do the same with the bottom.

Thanks!!!!!!! Should I predrill the holes for the screws or just go for it? My frame is poplar (just bought the wood yesterday, very excited for my kreg jig to come so I can put it together).

Also, is there any reason to buy Sintra over Komatex? Komatex is much less expensive in my area.
post #10 of 63
Quote:
Originally Posted by Frosteh View Post

Thanks!!!!!!! Should I predrill the holes for the screws or just go for it? My frame is poplar (just bought the wood yesterday, very excited for my kreg jig to come so I can put it together).

Also, is there any reason to buy Sintra over Komatex? Komatex is much less expensive in my area.


Komatex works just fine...they are essentially the same material from different Mfg sources.
post #11 of 63
Quote:
Originally Posted by MississippiMan View Post

Komatex works just fine...they are essentially the same material from different Mfg sources.

Awesome, thanks guys!
post #12 of 63
Quote:
Originally Posted by dheflin83 View Post

Is the 6mm sintra more difficult to ship/transport than 3mm? If I buy it locally, I'll need to be able to roll it up to get it in the car.

same question.

is the sintra/komatex bendable to load into the back of a car or SUV?

hope i don't need to rent a Uhaul to bring one home.
post #13 of 63
Quote:
Originally Posted by smokarz View Post

same question.

is the sintra/komatex bendable to load into the back of a car or SUV?

hope i don't need to rent a Uhaul to bring one home.

The 6mm will "bend" in a 1/3rd curve as in curved along it's short axis. It will "NOT" Roll Up.
As such, it can be curved enough to go into a SUV...but a car? C'mon now....

.....'Lessin' it's a big 'ol wide track Pontiac Station Wagon.

The 3mm....yeah, it can be curved almost back round on itself. But it's that "thinness' that also makes for more concerns when mounting directly to a surface (lumps...bumps...adhesive ridges) or requires a supporting Frame of the Screen is to be "Feee hanging".
post #14 of 63
Yep the 6mm will bend a bit but rolling it up is out of the question. One sheet and one Honda Pilot works, but when you are 6'2" make sure the ride home isn't too long. Don't ask me how I know....
post #15 of 63
cool. i'll be picking up a 4x8 sheet with a Toyota Highlander. thanks
post #16 of 63
can you screw/nail wood trim onto the sintra?
post #17 of 63
Quote:
Originally Posted by smokarz View Post

can you screw/nail wood trim onto the sintra?

Yes. I overlay Trim and attach it with Finish nails 90% of the time. I usually order Sintra in a size where I can allow for 2" to 3" of additional surface on all sides of the actual "Screen Area" so I can simply screw the Sintra onto the wall, and then overlay the Trim over the Screws.

Examples:

92" Diagonal Screen = 44" x 78"
48" x 96" Sintra is cut to 48" x 82"

110" Diagonal Screen = 54" x 96"
120" x 60" Sintra is cut to 60" x 102"

When we/I express concern for moving Sintra about in various vehicles, it usually refers to the larger 60" x 12" size...which is at most cut down to 54" x 106". The extra 6" "height" difference between 48" and 54" can make all the difference in smaller SUVs and HatchBack vehicles when trying to bend it enough to slide in.....let alone if the "height" must remain at 60"
post #18 of 63
thanks MM.

what do you typically use for trim pieces? 1x3 poplar? which is actually 0.75"x2.5"
post #19 of 63
I think the thin MDF moulding is the preferred trim. Cheap, thin and easy to work with.
post #20 of 63
Quote:
Originally Posted by johngraz View Post

I think the thin MDF moulding is the preferred trim. Cheap, thin and easy to work with.

do you have the exact type/size of this MDF moulding? perhaps a link?

i can't seem to find the right one when i was at Homedepot.
post #21 of 63
Quote:
Originally Posted by smokarz View Post

same question.

is the sintra/komatex bendable to load into the back of a car or SUV?

hope i don't need to rent a Uhaul to bring one home.

I just drove home a 5'x10' piece folded more or less in half in the back of my Tahoe. Fit quite nicely with lots of extra. I have 3mm, keep in mind.
post #22 of 63
Quote:
Originally Posted by Frosteh View Post

I just drove home a 5'x10' piece folded more or less in half in the back of my Tahoe. Fit quite nicely with lots of extra. I have 3mm, keep in mind.

that's great.

i'll be picking up the 6mm sheet though, so i guess it won't be as bendable as your 3mm sheet.
post #23 of 63
Quote:
Originally Posted by smokarz View Post

that's great.

i'll be picking up the 6mm sheet though, so i guess it won't be as bendable as your 3mm sheet.

If you're willing to wait, I'll be done with my screen this weekend and will let you know how the 3mm turns out. You could use that to decide between 3 and 6mm.
post #24 of 63
Quote:
Originally Posted by smokarz View Post

do you have the exact type/size of this MDF moulding? perhaps a link?

i can't seem to find the right one when i was at Homedepot.

Here is a closely similar picture of the Trim:



.......but if you'll look closely at the examples in this Thread:

http://www.avsforum.com/avs-vb/showt...=865218&page=2
in my tutorial (3.25") does not have a double outside curve that the 3.75" Trim seen in the 1st image.

I would think that if you simply ask someone in Lumber to help you locate the "3.25" x 5/8" MDF Base Board Trim", you'd get steered to it pretty quickly.

Edit: OK, I found the exact info you need:


MDF "Base" Trim. (3.25" wide x 5/8"" thin)




Home Depo Store SKU # 526895


Quote:
Originally Posted by Frosteh View Post

If you're willing to wait, I'll be done with my screen this weekend and will let you know how the 3mm turns out. You could use that to decide between 3 and 6mm.

No offense, but I don't see how that would represent enough data to help someone make a decision if there were no direct comparisons made between 3mm & 6mm.

What is helpful are specific references made by someone who has used both...and I've tried to relate that using 3mm Sintra carries with it more procedural risks than using the 6mm variety.

Really...the ONLY reasons one might even consider using 3mm are easier transportability due to increased flexibility...and the lessor cost per sheet.

But those "advantages" can be all too easily outweighed by the caveats that "thinness' bring into the equation.

That said, discounting one having any such problems, the 3mm will perform exactly like the 6mm.
post #25 of 63
thanks MM. i'll ask someone in lumber for that specific MDF next time i go to HD.

though i think 3.25" might be a bit too wide for my screen (48x82).

hopefully they'll have something similar in the 2"-2.5" range.
post #26 of 63
did you guys had to cut down your sintra sheet?

i was told NOT to use a circular saw to cut it because it's gonna chip bad.

if you did cut, which tool did you use for the job?
post #27 of 63
can i use a good utility knife to score it, like scoring a sheet of laminate?
post #28 of 63
Quote:
Originally Posted by MississippiMan View Post

No offense, but I don't see how that would represent enough data to help someone make a decision if there were no direct comparisons made between 3mm & 6mm.

What is helpful are specific references made by someone who has used both...and I've tried to relate that using 3mm Sintra carries with it more procedural risks than using the 6mm variety.

Really...the ONLY reasons one might even consider using 3mm are easier transportability due to increased flexibility...and the lessor cost per sheet.

But those "advantages" can be all too easily outweighed by the caveats that "thinness' bring into the equation.

That said, discounting one having any such problems, the 3mm will perform exactly like the 6mm.

I wasn't trying to say my results should be his deciding factor (although that was how my wording turned out, I guess). What I had intended my comment to be interpreted as was that he would be able to see a build with 3mm and then decide whether he would take it on himself. I don't doubt that 6mm is better, but I think that if one does a good job with 3mm, then the results will be the same, as you stated later. Sorry for the confusion. I haven't seen any 3mm builds on the forum, so I figured I'd give him the opportunity to see one.

Quote:
Originally Posted by smokarz View Post

did you guys had to cut down your sintra sheet?

i was told NOT to use a circular saw to cut it because it's gonna chip bad.

if you did cut, which tool did you use for the job?

Cheapo utility knife from the goodie buckets by the register at a hardware store. 3 passes and it's perfectly straight and smooth. Just make sure to use a new blade.
post #29 of 63
brought it home in the back of an SUV and cut it to size with a utility knife. works out great.

checkout my build thread over at the shack.

http://www.hometheatershack.com/foru...ique-gray.html
post #30 of 63
Have MM or maxxx check out the pictures, but the screen looks quite textured to me. Not being a master painter either, I can't really offer any ideas on how to make it smoother other than to use an ultra smooth roller like these (http://www.homedepot.com/Paint-Brush...&storeId=10051). I can't tell what you used in the picture but it looked a bit fluffy. For smoother you'd want to use HVLP.
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