Jogja Architect: What You Need to Know in Residential Renovations
Some of the projects we are working on are renovation projects. Since we are dealing more with residential buildings or houses, the discussion of our renovation is specifically in the case of residential buildings, more specifically those using reinforced concrete frames.
In general there are two renovation cases of houses, namely renovation without adding space and renovation with the addition of floors which are generally from one floor to two floors.
1. Renovation without increasing the number of floors.
For renovations such as this can be done provided that the land is still sufficient to accommodate the changed space requirements, especially for the addition of building area. Of course we remind you of the local KDB rules that apply. For the terms of the KDB size, it can be asked at the time of processing the IMB at the local licensing service.
Then how do you arrange your existing space by adding / changing a new room? Is it just enough to delete and then cross again with the new one like on paper? Apparently it's not that easy ...
Here, architect services are needed. Please note, residential buildings consist of many constituent components. The most important thing to note is the structural components (so that the house can stand) such as foundations, columns (pillars), sloof (lower bonding beam), ringbalok (upper bonding beam), and roof truss.
Each component of the structure has an important function in a building. It can be likened, if the component is damaged / removed, then the building can collapse. This is certainly not what you want.
Architects, with experience in their fields, will directly analyze the existence of these components at the beginning of planning. To save costs, usually the architect will try to maintain the existence of the structural components. Even if it turns out that it must be removed, it is necessary to consider a replacement structure that can support the building so that it does not collapse. Sometimes lay people who don't understand buildings, deliberately eliminate structural components because they are considered disturbing, without knowing that it is dangerous. The average component of the structure removed is a concrete column, because the presence of concrete columns sometimes interferes with the use of space, especially for circulation.
Columns are a very important element. In simple residential buildings, the columns used are usually limited to practical columns, which are useful as well as building supports, as well as wall binders. Of course the load supported starts from the top component, namely the roof frame and the cover. If the column is just removed, try to imagine how the roof frame load will be supported?
The architect will make drawings that show the existence of old structural components, which is still possible to use in supporting the new layout design. Of course, in the process, for the sake of saving development costs, the architect will use old structural components to be reused in the new design. This is where the expertise of architects is very much needed, namely how to make a new floor plan that suits the needs of the client, but still uses the old structural components so that the cost of development can be reduced.
In addition to the main structural components, in general, those that can be reused are finishing components such as sills, doors, shutters, and roof tiles. These components can still be used after being removed because the possibility of damage is quite small during the release process. Whereas for other finishing such as brick walls, ceramics / granite, gypsum ceilings, or patch profiles will definitely be damaged when released. However, if the architect can use these fragments as an aesthetic element in the new design, it is very likely that it will save costs, at least the cost of disposal.
2. Renovation with the addition of floors
For renovations with additional floors, it is usually done when the land is not sufficient to accommodate the new building area.
The addition of building floors requires more complicated considerations than renovations without adding floors. The main concern of course is the problem of building structure. The multi-storey building structure is clearly different from non-storey buildings.
In the case of adding floors, we must consider the condition of carrying capacity of the soil. The carrying capacity of this soil will affect the type of foundation to be used. For example, for locations in Yogyakarta, the carrying capacity of the land is quite good, although it varies in each area. So for a two-story building, a palm foundation is needed in each of the main columns of the building.
As the explanation for non-storey buildings, the existence of columns in buildings must be carefully considered. The difference is, in a multi-storey building, there is a main column as the main buffer of the building, especially the building support on the second floor. The main column type has dimensions larger than the practical column. With the presence of the main column, the function of the column is more practical for wall binders.
Addition of the main column must be accompanied by the addition of a point foundation that can be a footprint or pile foundation. For the case of residential buildings in the Yogyakarta area, the average two-story building only uses palm foundations in its main column.
The dimensions of the foundation are quite wide, so the area that must be excavated is quite extensive. The existence of this excavation will obviously damage the floor of the existing building. If the existing floor uses floor cover in the form of granite, ceramics, tiles, and other materials that are difficult to remove and easily broken, then we must look for the same new material. The problem is, these materials which are factory products will usually run out on the market since it was first launched. This is because producers always innovate with new products with different patterns and motifs.
In addition, to make a multi-storey building, a floor above the first floor space is needed. Floors can use cast concrete or other materials such as wood or thick GRC boards. For cast concrete floors, the installation requires molds that must be supported from below. This will automatically damage the ceiling on the first floor, as well as the electrical installation that blends with the ceiling.
The roof of the first floor of the building which was replaced with a cast floor, must be demolished first. Will later the frame and roof cover be installed again or not on the top floor, depending on the design and conditions of the existing material. Is it still feasible to use or not, does the size fit the new design or not. Responsible architects, of course, will think about this.
Finally, what must be considered at the time of renovation is the remains of the old building debris. Many or few, the debris must be disposed of elsewhere. This certainly requires disposal costs.
Are you ready to start renovating your house? :)