On 10/22/2012 1:30 PM, dadiOH wrote:
Keith Nuttle wrote:
We are planning on putting a mirror to cover the TV hole above our
fireplace. The plan is to remove minimal trim, place shims on the
sides of the existing opening so the mirror is flush with the back
edge of the mantel and the existing trim.

I plan on cutting this backing board so it would fit into the opening,
and holding it in with quarter round or similar.

What would be best for this backing board. MDF, plywood, etc.

Whatever as long as it is reasonably rigid. I used to have a condo with 12'
of floor to ceiling mirrors on the wall (which was drywall).

Should the mirror be bonded to the backer board. If so how?

I would use the black goop that mirror people use for that purpose.
Actually, I imagine most any would work...silicone, acrylic, Liquid Nails,
linoleum paste, etc. Just assure that it is something that won't damage the
silvering.


My concern is the length of the hole. I planned to put in the backer
board only, with no studs in the 41" length. The plan is to make it
removal IF there is ever a need to access the area behind it.

My thinking is at minimum a 3/8 piece of plywood but am unsure if that
is adequate.'

Thank to all who have responded so far. It looks like my wife is going
to get her wish, to have it in for a family get together in mid December.

I know but I am slow and like to thoroughly think things through.