If you own an older home in Waterloo Region, you have lath-and-plaster walls; if you are renovating or building, you are working with drywall. Understanding how they differ helps you make the right call.
Two Eras of Wall Construction
Lath and plaster was the standard wall system for roughly a century, up to the late 1940s and into the 1950s. Thin wood strips (lath) are nailed across the studs, and wet plaster is pressed through the gaps to lock in place over multiple coats.
Drywall — gypsum panels faced with paper — replaced it because it is faster, cheaper, and more consistent to install. Nearly every home built in Kitchener-Waterloo since the 1960s uses drywall.
Durability and Solidity
Plaster is harder and denser than drywall. It resists dents and dings, feels solid when you knock on it, and holds up to decades of use. That heft is part of why older homes feel so substantial.
Drywall is softer and more prone to dents, corner damage, and holes, but it is also far easier and cheaper to patch when that damage happens — a quick fix versus a plasterer's skim coat.
Sound and Fire Performance
Plaster's mass makes it naturally good at blocking sound between rooms, which is one reason old homes can feel quieter. Drywall on its own is thinner and transmits more sound, though modern assemblies use insulation, resilient channel, and double layers to close the gap.
Both perform well against fire; standard and Type X drywall are rated assemblies, and thick plaster also offers good fire resistance.
Repair, Renovation, and Wiring
Drywall wins on workability. Hanging a picture, fishing a wire, or cutting in a new outlet is straightforward. In plaster, the same tasks risk cracking the surrounding surface and require more care and skill.
This matters during renovations: opening up plaster walls for new wiring or plumbing is messier and more labour-intensive than the same work in drywall.
Asbestos and Lead in Older Systems
If your home predates 1980, be cautious before cutting into walls. Older plaster, joint materials, and the paint over them can contain asbestos or lead. Test suspect materials before sanding or demolition rather than assuming they are inert.
This is a key reason we advise homeowners not to rip into old walls casually — a quick test protects your household.
Which Should You Choose?
If your plaster is in good shape, keeping and repairing it preserves character, solidity, and sound control. If it is badly failed, or you are gutting a room anyway, drywall is the practical, cost-effective replacement.
There is no universal winner — it depends on the home's age, the wall's condition, and your renovation plans. We help homeowners make that call without defaulting to demolition.
Talk to a Waterloo Region Wall Specialist
Whether you want to restore original plaster or convert to clean modern drywall, the right choice depends on your specific walls.
D&D Interior Services works with both systems across Kitchener, Waterloo, Cambridge, Guelph, and surrounding areas. Get a free, no-obligation consultation and we will give you honest guidance.
Key Takeaways
- Lath and plaster was the standard wall system for roughly a century, up to the late 1940s and into the 1950s. Thin wood strips (lath) are nailed acros...
- Plaster is harder and denser than drywall. It resists dents and dings, feels solid when you knock on it, and holds up to decades of use. That heft is...
- Plaster's mass makes it naturally good at blocking sound between rooms, which is one reason old homes can feel quieter. Drywall on its own is thinner...
- D&D Interior Services serves Kitchener, Waterloo, Cambridge, Guelph and surrounding areas
- Get a free no-obligation quote — call or book online anytime
Sources & References
- Government of Ontario — Asbestos in the Workplace — Handling & Regulations
- Ontario Building Code — Relevant Standards & Guidelines
- D&D Interior Services field experience across Waterloo Region
