When it comes to finishing and repairing drywall, joint compound is an essential material. It is used to fill gaps, cover seams, and create a smooth surface before painting. While many people use putty knives or taping knives to apply joint compound, one question that often arises is whether it is possible to use a plastering trowel instead. In this article, we will discuss whether it is feasible to apply joint compound with a plastering trowel, examining the differences between these tools and their suitability for this task.
Understanding Joint Compound and Plastering Trowels:
Before we determine whether a plastering trowel can be used to apply joint compound, it is essential to understand the characteristics and functions of each tool.
Joint Compound:
Joint compound, also known as drywall mud, is a thick paste used for various drywall finishing tasks. It is typically either premixed or available as a powder that requires mixing with water. Joint compound is primarily made of gypsum, which gives it excellent adhesion and the ability to dry hard.
Plastering Trowel:
A plastering trowel, on the other hand, is a versatile tool primarily used for applying plaster to walls and ceilings. It typically has a wide, flat, and flexible blade, with a handle set at an angle for better control. Plastering trowels are designed to spread and smooth out plaster evenly for a professional finish.
Differences in Design:
While both joint compound and plastering trowels serve similar purposes, there are significant differences in their design and intended usage.
1. Blade Width and Flexibility:
Plastering trowels usually have wider blades ranging from 11 to 18 inches, allowing for greater coverage and faster application. On the contrary, putty knives and taping knives used for joint compound application are typically narrower, varying between 4 to 12 inches in width. This narrower blade allows for better control and precision when applying joint compound.
Moreover, the flexibility of the blade also varies between the two tools. Plastering trowels have more flexibility, enabling them to smoothly glide over curved surfaces, while putty knives and taping knives for joint compound are stiffer for more controlled application.
2. Handle Design:
Another significant difference lies in the handle design of both tools. Plastering trowels generally have a handle set at an angle, allowing for a more ergonomic grip and better control during extended use. In contrast, joint compound application knives typically have straight handles, enabling the user to exert more force for precise application.
Feasibility of Using a Plastering Trowel for Joint Compound:
Considering the differences in design and intended usage between joint compound application tools and plastering trowels, it is possible to use a plastering trowel to apply joint compound. However, certain considerations should be kept in mind before employing this method.
1. Skill and Experience:
Using a plastering trowel for joint compound application requires a higher level of skill and experience. The wider blade and increased flexibility could make it more challenging to achieve the desired smoothness and consistency when applying joint compound. If you are unfamiliar with using plastering trowels, it is recommended to stick to putty knives or taping knives designed specifically for joint compound application.
2. Adjusting Application Technique:
Applying joint compound with a plastering trowel may require certain adjustments to the technique. Due to the wider blade, the amount of joint compound picked up at once may be more than necessary for a specific area, leading to wastage or inconsistent coverage. Therefore, you may need to modify your technique by scooping smaller amounts of joint compound and applying it in controlled passes to achieve an even layer.
While it is possible to apply joint compound with a plastering trowel, it may not be the most suitable method for everyone. The design differences between joint compound application tools and plastering trowels make the latter more challenging to control and require a higher level of skill for optimal results. If you are an experienced plasterer or feel comfortable with using a trowel for joint compound application, it can be an alternate approach. Nevertheless, for most individuals, sticking to putty knives or taping knives designed specifically for joint compound would be the recommended choice for better precision and ease of use.