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Simulation done with a 142 m² house shows that roughcast, plaster, and render totaled R$ 20,506.92, equivalent to 5.06% of a global budget of R$ 405,000, reinforcing the importance of calculating the stage before advancing in the finishing
In a construction simulation with a 142 m² house, the cost to render a house, considering roughcast, plaster, and render, reached R$ 20,506.92, an amount equivalent to 5.06% of the global budget of R$ 405,000.
The data from the channel Sua Casa No Papel – PROJETOS helps those who are building or renovating to understand the real weight of this stage in financial planning.
The render usually marks the moment when the environments become more defined, but it also requires attention because it involves previous processes that should not be ignored.
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Cost to render a house includes more than the final layer of the wall
The calculation presented does not consider only the visible render in the finish. Before it, there is the roughcast, a layer applied over the masonry to create adhesion between the brick and the cementitious coating.
This stage is described as essential to avoid future problems. Without roughcast, the render may lose adhesion and detach from the wall, causing a greater loss than the initial savings.
After the roughcast, the wall can receive plaster or render, depending on the planned finish. In areas that will have ceramic, porcelain, or tile on the wall, there is no need to leave the surface perfectly smooth.
In these cases, plaster is applied, which prepares the base for the coating. In areas that will be painted, the smooth render is applied, made to leave the wall smoother and ready for the next stages.
Simulation used a 142 m² house with a global budget of R$ 405,000
The reference used in the material was a house called Londres, with 142 m². In the presented budget, the total construction value was rounded to R$ 405,000.
The total area of internal and external walls considered was 581 m². Based on this measurement, the activities of roughcast, plaster, and render were calculated, separating the environments according to the type of planned finish.
The sum of the three activities resulted in R$ 20,506.92. This amount corresponded to 5.06% of the total construction budget, a percentage used as a reference to understand the impact of this stage.
The material itself, however, emphasizes that this index should not be treated as a universal rule. Houses with fewer walls may have lower render costs, but may require a more robust structure, which changes the weight of other items in the budget.
Why the percentage can change from one project to another
The cost to plaster a house depends directly on the number of walls, the type of finish, and the characteristics of the project. A house with many rooms and more partitions tends to have a larger wall area to cover.
Projects with fewer walls can reduce the plastering area, but this does not necessarily mean a cheaper project. According to the material, when there is less masonry, the structure can become more overloaded.
Another important point is the ceiling. In the simulation of the London house, there was no plastering on the ceiling because the house was lined. If the owner wants to plaster this area, the cost may increase, even if the material indicates that this would not be necessary for that project.
Therefore, the percentage of about 5% works only as a trend for a standard house, with well-distributed walls and common finish.
How to estimate the value in your own house
To calculate how much it costs to plaster a specific house, the material suggests gathering data from the project or existing construction. Among the information used are built area, masonry projection, and number of rooms.
In a second simulation, a single-story house of 90 m² was created, with a masonry projection of 65 m² and eight rooms. The budgeting tool generated an estimate per activity, allowing the plastering item to be isolated.
The logic presented serves both those starting the project and those who already have a house in brick and wish to advance to plastering. Just consider the stages not yet executed.
The main guidance is not to look only at the final price of the plastering but at the entire cementitious coating set. Roughcast, render, and plaster form a technical sequence that affects the finish, durability, and budget of the house.
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