Originally Posted by clckwrkorange
I’ll be painting all parts of the frame black, but the screen will still need to stand-off a bit? I’m confident I’m missing something here. Is that because if might sag a little and show the edges or is it a screen opacity issue? Thank you for your advice!
Audiophile has it nailed....
When a Frame is built Flat with interior Braces, the entire frame can bow out just 1/8 across 10' and each and every interior brace would standout like a welt from a belt across the back. Or let me tell you about what is the most common occurrence. Moe often it might just be one brace, because the Frame is flat, but a supposedly flat and straight piece turns out to have a very small twist. It's installed with each end flush with the right angled edge of the exterior Frame. What happen next is the torque inherent in the twist gets transferred to "both" horizontal Frames edges and springs the frame out of true.
Really...people usually build flat for just two reasons.
- They think it's easier (...but it's not really, too many things can go south...)
- They are looking for as Thin a Frame as possible (...can't fault them there...but there are things that must be done to be certain of "lasting true-ness" and they add cost, and potential Fabric installation woes...)
When a "On Edge" frame is built to exacting measurements, and the Butt ends of each piece are Pocket Screwed, if carefully picked wood it used, the assembly works to straighten out and small defect...and keep it straight.
Why all the fuss? Because there cannot be enough emphasis on avoiding ever having any area of the image have a distinct Vertical line running though a bright area. It's not a pleasant sight, and depressing if it happens 3-4-12 months after the Theater debuts.
In any case, when Flat is an absolute must, then one of the things that must be done is using a standoff. As opposed to a small 1/2" Quater Round, I've seen 1.5" Wood Lattice (1/4"thick) serve the purpose of the QR. It doesn't take much stretch to lift the material off a recessed surface...emphasis on "recessed". Only 1/4" is hugely good, 1/8" just fine if indeed. I couldn't vouch for the thickness of Felt being able to do the job...but I cannot disallow it's possibility.
I see the possibility of creating a virtual Wall Width Acoustic Screen (2.39:1) The Wall is 12' wide, so a 129" wide 2.39:1 Frame would fit in with 6.5" to spare on each side. Now I don't know why the Screen was determined to be so small, but from the rear space I see (3') have looked at , just about anything realistic for the size room can be easily accommodated at each end and in the center areas within the Screen's perimeter. It would be 140"s of epic
Of course with rear access you won't need the French Cleats.
The B&Ws your using up front will fit nicely and the Frame's layout at each end can be easily adjusted. I suppose the rear question would be if you want to bother, and or if going 1:1.2 screen width to viewing distance w/4K is something that is attractive. Your not too far along to consider replacing the design and going truly Cinema is aspect. And just think how much nicer 16:9 will be at 54" high instead of 48"?