How to Mount a TV on a Plaster Wall in Old Toronto Homes
Many of Toronto’s older homes — particularly in The Annex, Leslieville, Roncesvalles, and other pre-war neighbourhoods — have plaster walls, not modern drywall. Mounting a TV on a plaster wall requires a different approach than standard drywall mounting.
Why Plaster Walls Are Different
Plaster walls are typically 3/4″ to 1″ thick, applied over wood lath boards. They’re much harder than drywall but also more brittle. Drilling into plaster without the right technique causes cracking, spalling, and ugly damage around the hole.
How to Find Studs Behind Plaster
Standard stud finders often fail with plaster walls. Professionals use: (1) neodymium magnets to locate drywall screws in the lath, (2) a knock test to find solid versus hollow areas, and (3) measuring from window and door frames (studs are typically 16 or 24 inches on center).
The Professional Approach to TV Mounting on Plaster
- Use masonry/plaster drill bits (not regular wood bits) at low speed
- Mount only into studs — toggle bolts work in plaster but studs are always more secure for TVs over 40″
- Use a backing board for weight distribution when studs don’t align with bracket holes
- Clean drill dust carefully to avoid scratching the plaster surface
RenoHeal mounts TVs on plaster walls across Toronto’s older neighbourhoods. Our technicians are trained for old-home installations and won’t cause unnecessary damage to your historic plaster surfaces.
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Frequently Asked Questions
Can you mount a TV on a plaster wall?
Yes, but it requires special drill bits, correct stud-finding techniques, and proper anchors. DIY attempts on plaster walls often result in cracking. Professional mounting is recommended.
How do you find studs in plaster walls in old Toronto homes?
We use a combination of neodymium magnets to detect lath screws, knock testing, and measuring from known reference points like windows and doors.
Does mounting on plaster cost more than drywall?
Yes, slightly — plaster wall mounting typically costs $200–$280 vs $150–$200 for standard drywall, due to the extra care and specialized drill bits required.
About RenoHeal Handyman & Renovation
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