Kreg Owners' Community

I'm thinking about mounting a flat screen on my wall.  Problem is I have plaster & lathe walls.  Here's my plan.  Mount a 3/4" plywood backer board using 3" lag bolts to the studs big enough to securely hold the wall mount bracket.  Mount the bracket to the backer board using many, many 1 1/2" lag bolts.  Thoughts? 

Views: 598

Reply to This

Replies to This Discussion

Brian I see nothing wrong with your plan.  The problem with lath and plaster walls is that the laths are attached to the wall studs with small nails making the laths very brittle and easy to let go of the wall studs.  The plaster is attached by the plaster that passes between the laths and when it becomes dry it bonds itself to the laths.  Over time it becomes brittle and becomes loose.  This makes the plaster unsuited to hold anything that weight much over 5 to 10 lbs.  It is also not a very good anchor point for attaching your plywood.  If bridging multiple wall studs with a 3/4 inch thich piece of plywood you will get most of your holding power by lagging into the wall studs themselves.  The studs should be between 16 and 18 inch centers however may be as wide as 24" depending on who built the wall.   I would recommend spanning of at least 3 studs if possible but here again it will depend on the weight of you TV.  I worse cases I would open the area behind the intended TV placement and maybe add some additional support. 

Since the TV is held by two brackets, if you can fit it in a location where both brackets are screwed into the wall studs I would think that would sufficient. 

Hi Jay.  Thanks for the reply.  I like the idea of opening the wall and adding more support.  That way I could build 2x4 supports in the wall to secure the wall mount.

Reply to Discussion


Need Help?

For Technical Support, call 800-447-8638 or send a message. Reps are available Monday through Friday from 8am to 5pm (CST). 


  • Add Videos
  • View All


Puzzle Caddy/Board

Hello All - I'm looking for a plan for a puzzle caddy to replace the frail cardboard ones we've used in the past...large main area and two smaller sorting/storing trays. If anyone has such a plan or has seen one someplace, I'd love to hear about…Continue

Tags: puzzle, Project

Started by R.J. Foster in Miscellaneous Dec 4.

Edge Joining 2" Boards 1 Reply

Hi Everyone,I appreciate all the threads on the community. I've got to use this more, you guys are great.I got my hands on some beautiful ambrosia poplar, 2 inches thick, that I want to join for a desk/counter top. Using the 2.5 inch screws and…Continue

Tags: joining, edge

Started by brian lazenby in Beginners' Zone. Last reply by Brad Martin Dec 1.

What type screw to use for Black Walnut 2 Replies

I have some 2" x 6" Black Walnut and need some 2 1/2" screws. To best of my knowledge Walnut is a hardwood so I need to use fine thread screws. However I can not find that length of Fine thread screws on Kregs website. Does anyone know where I can…Continue

Started by Duane Heda in Other Kreg® Products. Last reply by Duane Heda Dec 1.

Working in carport? 2 Replies

I share a large shop with a friend at his house, but, for the last couple years I have hardly been there to work on anything.I have moved a lot of the duplicate tools into my carport and have been working there.Does anyone else work in the…Continue

Started by Steven Brown in Miscellaneous. Last reply by Darrell Wertz Dec 4.

Product Reviews

Kreg Project Center Work Station

The Kreg Project Center is great by itself, but 2 KPC's are better than 1 when you want to set up a 12 ft. work station in a couple minutes.…


Posted by Glenn Revheim on April 5, 2018 at 5:57am — 4 Comments

Festool Domino 500

The first thing I will do is set price aside and focus on the tool and why I bought the Domino. 

      I have orders for a few dining tables and chairs.  I have made one prototype chair, while I have all the tools to make angled…


Posted by justin waldron on April 2, 2018 at 5:46am

Kreg Foreman

I have built many kitchens and finally decided to buy the Foreman, because my latest kitchen consisted of 28 cabinets and I was over my hand hurting from all the drilling, moving the clamp etc., it seemed like a smart choice.



Posted by justin waldron on January 8, 2018 at 4:05am — 2 Comments

Kreg K5 Jig Review

Posted by Daris R. on November 20, 2017 at 5:39pm

© 2018   Created by KregRep.   Powered by

Badges  |  Report an Issue  |  Privacy Policy  |  Terms of Service