Homes built before the 1950s often feature lath and plaster walls, a construction method that gives interiors a solid, classic feel. While these walls are durable, they can be challenging when it comes to hanging shelves, mirrors, televisions, or heavy artwork. Unlike modern drywall, lath and plaster consists of wooden strips covered in multiple layers of plaster, which can crack or crumble if handled incorrectly. Choosing the best anchors for lath and plaster is essential to ensure a secure installation without damaging the wall. Understanding the right anchor types, weight limits, and installation techniques will help homeowners complete projects safely and confidently.
Understanding Lath and Plaster Walls
Before selecting the best anchors for lath and plaster, it is important to understand how these walls are constructed. Traditional lath and plaster walls are made from narrow wooden strips, called laths, nailed horizontally across wall studs. Wet plaster is then applied over the laths, seeping into the gaps and hardening to create a strong surface.
This structure makes the wall thicker and more rigid than drywall. However, it also means that drilling into plaster can cause cracks if not done carefully. The hollow space behind the plaster layer varies, and sometimes the lath may interfere with anchor expansion.
Common Challenges
- Plaster cracking during drilling
- Difficulty locating studs
- Uneven wall thickness
- Reduced holding strength if only anchored in plaster
Because of these challenges, selecting the right wall anchors is crucial for both safety and durability.
Why Regular Drywall Anchors May Not Work
Many people assume drywall anchors will work in plaster walls, but this is not always the case. Standard plastic expansion anchors rely on soft drywall material to grip securely. Plaster, however, is harder and more brittle, so these anchors may not expand properly or may cause cracks.
The best anchors for lath and plaster are specifically chosen for their ability to grip behind the wall or anchor into studs securely. In many cases, fastening directly into a stud is the strongest solution. When studs are not available in the desired location, specialized anchors become necessary.
Best Anchors for Lath and Plaster Walls
There are several reliable options when choosing the best anchors for lath and plaster. The right choice depends on the weight of the object being mounted and whether a stud is accessible.
1. Toggle Bolts
Toggle bolts are often considered one of the best anchors for lath and plaster when mounting heavy items. They consist of a bolt and spring-loaded wings that expand behind the wall, distributing weight over a larger area.
Advantages of toggle bolts include
- Strong weight capacity
- Secure hold behind hollow spaces
- Ideal for heavy shelves or televisions
When installing toggle bolts, drill slowly to avoid cracking the plaster. It is also helpful to apply painter’s tape over the drilling area to reduce surface damage.
2. Molly Bolts
Molly bolts, also known as hollow wall anchors, expand behind the wall as the screw is tightened. They provide a strong grip and are easier to install than toggle bolts because they remain in place once inserted.
Molly bolts are suitable for medium-weight applications such as curtain rods or decorative shelving. They are often recommended as some of the best anchors for lath and plaster when moderate support is required.
3. Heavy-Duty Self-Drilling Anchors
Some heavy-duty self-drilling anchors are designed for plaster walls. These anchors cut into the wall material and create their own threads. However, they are best used for lighter loads and should not be relied upon for extremely heavy items.
Always verify the weight rating before choosing this option. While convenient, they may not provide the same holding strength as toggle or molly bolts.
4. Anchoring Directly into Studs
Whenever possible, anchoring directly into a wall stud is the safest and strongest solution. Using a stud finder designed for plaster walls can help locate the wooden framing behind the lath.
For heavy items like cabinets or large mirrors, drilling into studs with wood screws eliminates the need for wall anchors altogether. This approach significantly reduces the risk of wall damage and anchor failure.
Weight Considerations
Understanding weight limits is essential when choosing the best anchors for lath and plaster. Overloading an anchor can cause it to pull out, damaging the wall and potentially causing injury.
- Light loads (under 10 pounds) Heavy-duty self-drilling anchors or small molly bolts
- Medium loads (10-25 pounds) Molly bolts or smaller toggle bolts
- Heavy loads (25+ pounds) Toggle bolts or direct stud mounting
Always distribute weight evenly when mounting larger objects. Using multiple anchors can increase overall stability.
Installation Tips for Success
Proper installation plays a major role in ensuring your anchors hold securely. Even the best anchors for lath and plaster will fail if installed incorrectly.
Drill Carefully
Use a sharp drill bit and apply steady, gentle pressure. Avoid hammering or forcing the bit through the plaster, as this can create cracks that spread outward.
Use Tape to Prevent Cracking
Applying painter’s tape over the drilling area helps stabilize the surface and reduce chipping.
Pre-Drill Pilot Holes
Creating a pilot hole ensures a clean entry point and reduces stress on the plaster layer.
Avoid Over-Tightening
Over-tightening screws can weaken the anchor’s grip and damage the plaster. Tighten only until secure.
Common Mistakes to Avoid
When working with lath and plaster walls, certain mistakes can compromise both safety and aesthetics.
- Using plastic drywall anchors designed only for gypsum board
- Skipping the stud check before installing heavy items
- Drilling too aggressively
- Ignoring weight limits
Taking the time to choose the best anchors for lath and plaster prevents unnecessary repairs and ensures long-term stability.
Maintaining Wall Integrity
Lath and plaster walls are valued for their durability and sound insulation, but they can be difficult to repair if damaged. Minimizing unnecessary holes and carefully planning mounting locations can preserve the integrity of the wall.
If a hole becomes too large or damaged, repair kits designed for plaster can restore the surface before repainting. However, prevention is always easier than repair.
Selecting the best anchors for lath and plaster walls requires understanding both the wall structure and the weight of the item being mounted. Toggle bolts and molly bolts are among the most reliable options, while direct stud mounting provides maximum strength whenever possible. Careful drilling, proper weight distribution, and attention to detail ensure secure installations without cracking or weakening the plaster.
By choosing the right anchor and following proper installation techniques, homeowners can confidently hang shelves, artwork, and fixtures on lath and plaster walls while preserving the character and strength of their older homes.