Hello, new here but been searching and reading for a while. I have not been able to find a specific answer to my question.
Background is I'm mounting my 55" Samsung (LN55B640) on a tilt swivel mount. However my studs are not where I need them. My plan is taking a piece of 3/4"plywood and mounting across three studs, obviously lagging it top and bottom (6 lags). I will then mount the mount to the plywood. What should I mount the mount with? Been thinking 1 or 11/2" lag bolts.
i would use 2x4 to hold that weight. cut the 2x4 to hit the studs nail them into the studs with 2.5 inch nails then screw the tv mount into the 2x4. that is a heavy tv and you will be mounting it to solid wood. i know plywood is strong but it is only 3/4 inch thick and the screws will go through it and be into drywall. how long are the mounting screws. if you do not want to see the wood you can cut a section of the drywall out and run 2x4 from one stud to another. do not nail the new cross pieces in with the thin part out or you will elminate ever running any wires or pipes in that section without removing it. just cover with new drywall pieces and spackle it over and sand and paint it and you will never know it was done. only problem with this is if you wall papered , paneled or do not have the right colour paint left. then do it on the outside.
Remove a section of dry wall so you can see your studs. Install 2 2x4's between the studs horizontally to provide a cross member for your lag bolts to hit. Replace the section of drywall over the 2x4's, patch your drywall, paint if necessary, and you are done. This is how I did it at least and it came out really nice.