A traditional 3-coat plaster is typically 7/8″ thick and when you add in the 1/4″ wood lath that supports the plaster wall, you have a wall that is more than 1″ thick! Compared to today’s most common drywall thickness of only 1/2″, that is a difference worth noting.
How Thick Is Plaster Wall?
When it comes to home construction, plaster walls are a popular choice. But how thick is a plaster wall? The answer depends on a variety of factors, such as the type of plaster used, the size of the wall, and any additional insulation that may be added.
Plaster walls are typically made of a mixture of sand, lime, and water, which is then spread onto the wall and allowed to dry. The thickness of the plaster wall depends on the type of plaster used and the size of the wall. Gypsum plaster is typically the most common type of plaster used and is usually applied in three layers. The first layer is a scratch coat, which is applied about 1/4 inch thick. The second layer is a brown coat, which is applied about 1/2 inch thick. The third layer is a finish coat, which is applied about 1/16 inch thick. This gives the wall a total thickness of 3/4 inch.
For larger walls, such as a room divider or a partition wall, the thickness of the plaster walls may be increased. Generally, the more insulation added, the thicker the wall will become. For example, a wall with a single layer of gypsum plaster and an insulation blanket may reach