Even if you change a part of the room by remodeling, it will improve the usability of the room you usually spend and make your daily life comfortable. However, when performing remodeling, it is important to have a clear purpose, not a rough image of "easy to use" or "comfort". To that end, this time we will introduce what you need to know before remodeling an apartment and examples of room remodeling. Things to Know when Remodeling an Apartment RoomDifference from Renovation The word "renovation" is similar to "remodeling". Remodeling means repairing to bring it closer to the state when it was newly built, and is often used in a wide range of construction work. On the other hand, renovation refers to construction work that matches the current lifestyle, with the purpose of adding new added value to what is already there. However, in some cases, the two may be used interchangeably, or remodeling may be termed as a minor repair and renovation as a major repair. Confirm in Advance whether the Desired Remodeling can be done.If the house is a structure that supports pillars and pillars in combination, there are many cases where relatively free remodeling such as removal of walls can be performed. However, in the case of a structure in which the walls are combined and supported by the surface, the walls support the house, so there are restrictions on the walls that can be removed. Especially in a condominium, what kind of remodeling can be done depends not only on your own room but also on the structure of the whole condominium. Therefore, before start remodeling, please check whether you can do the construction you want in advance. Check the rules when remodeling an apartment Condominiums have management rules, and even if they are proprietary parts, they generally have rules regarding remodeling. Depending on the content, it is required not only to obtain approval from the owner and the management association but also to obtain the consent of the residents on the upper and lower floors before carrying out the works. Please check the terms and conditions of the condominium and comply with the restrictions regarding renovation, reform and remodeling works. It is often the case that apartments can be remodeled only in the private areas such as rooms. Please note that entrance doors and balconies are common areas and cannot be remodeled in principle. Let's imagine the cost required to remodel the room When remodeling a room, it is also important to check the management agreement and the construction structure of the condominium, but it is probably the cost part that is worrisome. No matter how much you would like to make a remodel, if you can't afford it, it won't come true. By grasping the rough cost, it will be one of the materials for studying the contents of reform. Here, we will introduce the market price as a guide, how much it costs to remodel the room. <Remodeling of living room/room> 200,000 yen to 2 million yen for living room 100,000 yen to 1 million yen for storage 500,000 yen to 1 million yen for Japanese-style room 100,000 yen to 1 million yen for Bedroom Make your room more comfortable, example of Condominium RemodelingWhat kind of remodeling should be done to make the present room more comfortable? Next, we would like to introduce an example of an apartment remodeling. Expand your space by eliminating rooms and corridors Many people want a spacious space for places where the family spends a long time, such as the living room. You can expand the room by removing the walls that separate the living room, such as the corridor and living room. In some cases, if there is a room that is not used much, the wall of the room adjacent to that room is removed and the room is expanded by one room. Change the flooring material to make a Japanese-style room a Western-style It is a common case that one of the rooms is a Japanese-style room, but there are people who do not use it much when they actually live. If you prefer a Western-style room, you can replace the tatami mat in a Japanese-style room with a wooden floor and arrange it in a Western-style room. If you have the courage to change it, you can use a flooring mat that can be arranged on the flooring just by spreading it. Replace wallpaper and ceiling cloth If you want to change the taste of the entire room, try changing the wallpaper or the cloth on the ceiling. The walls and ceilings are large and easy to see, so a slight change in color or pattern can greatly change the impression of a room. Also, when choosing a wallpaper, pay attention to not only the design of the wallpaper but also the function of the color. For example, a light color such as white or beige makes it easy to match with any interior, making it easier to see the entire room, but dark colors create a chic atmosphere, and depending on the arrangement of furniture, it may happen that the entire room may look narrow. Install underfloor heating In winter, etc., it is often the case that the floor feels cold, and it may not be possible to warm up with just the air conditioner. If you feel a strong cold, you may consider floor heating. There are two types of floor heating: "hot water type" and "electric type". The hot water type is suitable for a wide range and when it is used for a long time, and the installation cost is higher than the electric type, but running cost is low. On the other hand, the electric type is suitable for narrow spaces such as the feet of the kitchen where the usage time is short. The installation cost is lower than the hot water type, but the running cost tends to be slightly higher. The construction cost will vary depending on the location and range of construction, as well as the type of floor heating, so let's get a quote first and consider it. Next time, we will explain a little more detailed remodeling of condominiums, detached houses, and renovation of machiya house. Thank you and best regards,
What are the thermal insulation and soundproofing effects of the double window sash? In order to improve the heat insulation of the house, it is effective to increase the heat insulation of the windows that occupy a large area of the wall. One way to improve the heat insulation of windows is to install a double window sash. Therefore, we will explain what double window sashes are and what is different from double glazing that is easily confused, and then explain the heat insulation and soundproofing effects of double sashes. What is Double Window Sash? Double window sash has two sashes, one is an outer window and the other is an inner window, and is also called a double window. Double window sash is easily confused with double glazing (paired glass), but double glazing is a window in which two glasses are fitted in one sash. There are cases where double window sash is installed from the beginning when newly built, but it is also possible to install an inner window inside the window frame by remodeling to make a double window. Only the proprietary part can be freely remodeled in a condominium, but since the inner window is installed inside the room, it can be installed without problems. However, when making double window sash by remodeling, if the depth of the window frame is insufficient, it is also necessary to install the extended frame. In addition, double window sash is basically installed on the sliding window, so it cannot be installed on the raising and lowering windows. The double window sash has a heat insulation effect and is also effective in preventing condensation Even if the walls are heat-insulated, if the window occupying most of the wall area is a piece of glass, it is still easily affected by the outside temperature. Through the windows, hot summer sunlight and winter chill may be transmitted to the room. The double window sash is characterized by the fact that an air layer is created between the sashes, making it difficult for the outside temperature to be transmitted. If you install a double sash, you can live in a summer and winter more easily than with a single sash. Condensation occurs when warm air in the room comes into contact with the cold window glass, so a double window sash makes it difficult for the window to cool down and also prevents condensation. If you want to improve the heat insulation, you can replace the glass with double glazing in which air is trapped in the hollow layer between the two glasses, but it is better to install an inner window to make a double sash for higher effect. Also, the heat insulation effect of the double window sash changes depending on the glass and sash used. The heat insulation effect is higher when using a double window sash with double glazing than when using single glass. Among them, Low-E double glazing coats the glass on the indoor side with a special metal film to make it easier to capture the sunlight and prevent warm air from escaping. Regarding the sash itself, the resin sash, which does not conduct heat easily, has a higher heat insulating property than that of a general metal material. Please consider airtightness too when selecting. The double window sash also has a soundproof effect The air layer created by the double window sash has the function of blocking sound, which is also useful for sound insulation. Noise can be categorized into two types: air-borne sound that is transmitted by the vibration of air and building-borne sound that is transmitted from building walls, floors, and ceilings. Of these, air-borne sound can be mitigated by using a double sash. For example, if you are worried about the sound of cars and trains passing by in a house near a road or railroad, or if you are struggling with the barking of dogs in your neighborhood, you can expect a sound reduction by installing a double sash. Alternatively, the double window sash is effective as a sound leakage countermeasure for stereo sound at home. Let's consider double window sash with consideration of disadvantages A double window sash can be expected to have a heat insulating effect and a soundproofing effect, but it also has a disadvantage. The double window sash will open and close two windows when opening the windows. You may find it awkward to open two windows each time when you ventilate or move in and out. Also, installing the sash inside may create a feeling of pressure. Especially when the extended frame is attached by remodeling, it may protrude more than the window frame so far, so you may feel the room is narrow. A sash with a color that naturally blends with the interior of the room tends to give a clean impression, so it's a good idea to select it while giving consideration to its appearance. The double window sash reduces the heat in the summer and the cold in the winter, which makes it easier to spend comfortably and can be expected to have a soundproof effect. If you find it difficult to live due to indoor temperature and sound issues, consider using a double sash while considering the disadvantages. Summary ・Double window sashes have two sashes installed in one window. ・Because there is an air layer between the sashes, heat and sound are less likely to be transmitted, and there is a heat insulating effect, the prevention of condensation, and a soundproof effect ・The heat insulation of the double window sash changes depending on the material of the sash and the type of glass. ・The double window sash has the disadvantage that it requires opening two windows and may create a feeling of pressure. We also accept introductions and consultations of partner contractors. When renovating the room, please consider the above options and have a comfortable life.
7/2/2020 What is the difference between Earthquake Resistant and Seismic Control and What are the Reinforcement Costs?Read Now In order to have a safe housing in Japan, which is an earthquake-prone country, it is necessary to adopt a structure that can withstand a large earthquake that can occur at any time. This time, we will explain the differences between the structures of seismic isolation, earthquake resistance, and seismic control, and the features of each. Also, please refer to the cost of earthquake-proof reinforcement. ■What is the difference between Seismic Isolation, Earthquake Resistance, and Seismic Control? Earthquakes are the most vigilant risk in Japan to attack homes. Research on construction methods that can withstand earthquakes has been carried out for a long time, but the mainstream in recent years is either seismic isolation, seismic resistance, or seismic control. First of all, let's know the characteristics of each and sort out the differences. Seismic Isolation: Absorbs Shaking Seismic isolation is a structure designed to absorb vibrations and prevent damage from being directly transmitted to buildings when an earthquake occurs. A special device is installed between the foundation and the building, which absorbs the shaking, so that you do not feel too much shaking. In addition to general earthquakes up to a seismic intensity of around 3, when a large earthquake with a seismic intensity of 5 to 7 class occurs, the shaking does not reach the core of the building, reducing the risk of damage.Originally the structure of the Machiya was the vibration absorbing structure, where the pillars were built on stones set up on the ground, and without the use of nails, the bending of the tree disperses the power of the earthquake. Earthquake Resistance: Withstands Shaking In the event of an earthquake, a structure with enough power to prevent buildings from collapsing is earthquake-resistant. By constructing the building from the foundation solidly, even if a large amount of energy is applied to the building, it will avoid destructive damage such as collapse and protect the lives of people inside the building. The Building Standards Act has been revised many times so far, but especially since it was stipulated in the 1981 revision to improve earthquake resistance, many of the houses built after that have earthquake resistant structure. Seismic Control: Control shaking Seismic control is a structure in which a special device is embedded in a sturdy wall, and the device absorbs the shaking generated by an earthquake and controls it so that it does not propagate. It has a structure that allows the building itself to be controlled so that it does not shake, and has the advantage of preventing the furniture and home appliances that are installed from falling over. The Kumamoto Earthquake of April 2016 also damaged a relatively new wooden house. Depending on the type of earthquake, even a house with earthquake resistance cannot be relieved. If you live in an old wooden house, you may be more concerned. How much does one cost when considering earthquake-proof reinforcement? We will explain about seismic retrofitting of wooden houses.
■What is a wooden house that requires earthquake resistance? The need for seismic retrofitting of a house is first judged by whether it is a wooden house under construction before May 31, 1981. Among the houses that apply to the above, wooden houses that have the following features require seismic reinforcement. 1) Wooden house with continuous openings on the south side and no walls at the four corners of the building 2) Wooden house with relatively large cracks on the outer wall and foundation 3) Wooden house standing in an area with poor ground (liquefaction, etc.) 4) Wooden house with problems in verticality of columns and walls and horizontality of floors 5) Wooden house whose plane shape is complicated 6) Wooden house with tiled roof (thatched roof) and mud wall 7) An old folk house with a pillar size of 12 cm x 12 cm or less ■Seismic retrofit construction costs Construction costs, including reinforcement design, vary depending on the seismic performance of existing houses. For example, changing the current tiled roof to a metal roof to improve seismic performance costs 1 million yen or more depending on the scale of the house. In general, the cost of earthquake-resistant repair per wall with a width of 91 cm is about 100,000 yen. Also, if you add a concrete foundation, it will cost about 50,000 yen per 1m. The general construction cost will be approximately 1 million yen or more, depending on the scale of existing houses and earthquake resistance. If you also carry out renovation work at the same time, additional costs will be required. If you purchase an old house and consider renovating the building, consider seismic retrofitting together. It is possible for the architect to give advice from various points of view, such as the method of seismic reinforcement. If you are considering a refurbishment, please contact us. What are the new earthquake resistance standards after 1981? Explain the difference from the old earthquake resistance standards Have you heard of the word (new Earthquake Resistance Standards have been adopted since 1981) as property information, or have you seen that it says new Earthquake Resistance Standards or old Earthquake Resistance Standards? Earthquake Resistance Standards is divided into new Earthquake Resistance Standards and old Earthquake Resistance Standards since 1981. How are these new and old Earthquake Resistance Standards different? Therefore, this time, we will explain the new Earthquake Resistance Standards since 1981, and the differences between the new Earthquake Resistance Standards and the old Earthquake Resistance Standards. If you would like to know more about Earthquake Resistance Standards, please refer to it. Earthquake Resistance Standards are the criteria for the durable structure of a building against earthquakes during the design stage of the building. The Earthquake Resistance Standards have been revised and the Earthquake Resistance Standards applied after June 1, 1981 are now became to called “new Earthquake Resistance Standards” and the standards applied before that are called “old Earthquake Resistance Standards”. In 1950, it is a standard set by the Building Standards Act for the purpose of protecting human life and property, and also sets standards for building sites, structures, and equipment. There is a rule that all buildings in Japan today must comply with this standard. The Earthquake Resistance Standards have been reviewed in response to the great earthquakes that occurred in the past. Due to the damage caused by such a great earthquake, the old Earthquake Resistance Standards were reviewed and the new Earthquake Resistance Standards were newly established. Which buildings are built under the new Earthquake Resistance Standards? Buildings that meet the new earthquake resistance standards are those that have been approved after the implementation of the new Earthquake Resistance Standards, to the best of our knowledge, it is said that the new Earthquake Resistance Standards have been applied to buildings completed after September to October 1981. However, there are cases where even the building built in 1982 was built with old Earthquake Resistance Standards. In the case of condominiums, the construction period is about one to one and a half years. Even if the building confirmation of the condominium was received in June 1981, it is considered that the new Earthquake Resistance Standards are applied to the building completed in the summer-autumn 1982 at the earliest. What if you want to know whether the Earthquake Resistance Standards of a building is Old or New?
To find out whether the house you are currently living in or the building you are considering to buy is built with old Earthquake Resistance Standards or new Earthquake Resistance Standards, please check the date on which the building confirmation application for that building was accepted. If the date of issue of the building confirmation notice is June 1, 1981 or later, it is a new Earthquake Resistance Standards building, and if it is before May 31, it is an old Earthquake Resistance Standards building. If the property has a building confirmation, there is a building confirmation notice available. In the unlikely event that owner have lost the building confirmation notice, you will need to request the issuance of a certificate of the items listed on the confirmation ledger at the window of the local government or government office. Please note that if the property is too old, it may not be stored. Difference between Old and New: Earthquake Resistance Standards changed to Seismic Intensity of 6 The big difference between new Earthquake Resistance Standards and old Earthquake Resistance Standards is the magnitude of seismic resistance standards. The old Earthquake Resistance Standards stipulates that "buildings will hardly be damaged by an earthquake with a seismic intensity of 5 or higher," and a standard was set to withstand medium earthquakes. However, the damage from the 1978 Miyagiken-Oki Earthquake was greater than expected, the earthquake resistance was reviewed as it is expected that the old Earthquake Resistance Standards will cause significant damage even if a large-scale earthquake does not occur. Focusing not only on preventing buildings from collapsing due to an earthquake but also on ensuring the safety of people inside the buildings, the new Earthquake Resistance Standards set up based on the standard of "withstanding an earthquake with a seismic intensity of 6 or more" and take measures against large earthquakes. In addition, it is possible to reinforce the building of old Earthquake Resistance Standards to the same extent as new Earthquake Resistance Standards by renovation. However, since the structural design is different from the beginning, the idea is to strengthen it, and it is not always the same as the new Earthquake Resistance Standards. In the budget, please make a detailed discussion in the meeting about which part will be used to reinforce the building, which part will be replaced with new equipment and make it clean and beautiful property. Let's continue with yesterday's explanation. First, let's talk about each type and its characteristics. Metal Tiles
Slate Tiles
Clay Tiles
"How to decide on roofing tiles" a big change between "renovation" and "new construction".
If you're remodeling, choose "within weight limits". The lighter the roof, the better the building's earthquake resistance, so one correct answer is that "lighter roof tiles are better". In the case of remodeling where the structure of the building itself cannot be changed, making the roof heavier than before construction will lead to weakening against earthquakes. It is safe to choose roofing materials that are the same or lighter than before, so that a building that has been aged for a long time and has deteriorated over time will not be further weakened by reforming. After that, please decide the roofing material by paying attention to functions such as service life and heat insulation. For new construction/rebuilding, select the roof by design rather than weight On the other hand, the weight of roof tiles is less of an issue for “new” or “rebuild”. This is because the structural design of the building should be designed according to the weight of the roof tile you want to use. If you look at the news of recent disasters, you often think that "the roof should be light because of its earthquake resistance". But you don't need to choose roof that is lighter than you need, as long as the structure of your building can support it. When building a new building or rebuilding it, we think it's good to prioritize functions other than earthquake resistance and design, and choose freely. There is no roof tile that has all the functions, so please consider what you need and choose the roof tile you like. We will compare the four axes of “durability”, “cost”, “design” and “anti-earthquake/typhoon”, and introduce the optimum roof tiles and their reasons.
Select "Clay roof tiles" if "durability" is important "I want to make a house where people can live with peace of mind for at least 30 years." "The initial cost can be high, so I want to keep future costs as low as possible." Clay (pottery) roof tiles are most recommended for such people. Ceramic tiles are pottery, so they rarely deteriorate with age. In addition, it has a wide variety of colors and shapes, and it has little color fading. However, please note that changing the roof from other roofing materials is not recommended due to its earthquake resistance. Select "Slate roof tiles" if "cost" is important Slate roof tiles are recommended for those who want to prioritize cost above all. Just because it's cheap doesn't mean it's unreliable. In addition to being inexpensive, partial repairs and replacements are also possible, and there are many contractors who carry out construction. It is safe even in an emergency. Select "Galvalume steel plate" if "design" is important If you want an urban house that designability and emphasizes design, a metal roof made of "galvalume steel sheet" is recommended. You may find that the Galvalume steel roof looks like a tin roof from a long time ago and looks cheap. However, because it gives a simple and sharp impression, it looks well with an urban modern house. In particular, it goes well with box-type houses, which have become very fashionable these days, and houses with a simple exterior with a one-sided roof. It is a roofing material often used by atelier architects. On the other hand, if you prefer a traditional and solid image, "clay roof tiles/cement roof tiles" will be your choice. Select "Galvalume steel plate" or "Slate" if "earthquake/typhoon" is important If both earthquake resistance and wind resistance can be achieved at the same time, we recommend using a metal or slate roof made of "galvalume steel sheet". In the case of remodeling, using heavy Japanese tiles may make the building vulnerable to earthquakes, so it is better to avoid it. In addition, Japanese tiles and sheet-shaped asphalt single tiles, in which each tile is divided into smaller pieces, pose a risk of slippage, even if they are not blown away. The above are the criteria for selecting roofing materials and the advantages and disadvantages of each roofing material. If you are considering renovating, please feel free to contact us. As it is the rainy season, today we will explain about the roof tile that protects the house from rain. Tile roofing is a clay slab that covers a roof, which is common in Asia. The purpose of the roof is to protect the house and its occupants from natural phenomena. Various nature such as rain, wind, dew, temperature changes, humidity changes, and sunlight affect homes and people. Each of them is absolutely necessary for us, but it is harmful if we receive more than necessary. The house regulates it, and the roof protects it. After the period when comfort was secured, what was demanded for the roof was status and aesthetics, and then tiles appeared. In Japan, it was 1400 years ago. Tiles are boards made of clay or other materials pre-made with curved surfaces that overlap each other. Covering the roof with these tiles is called "tile roofing". Depending on the material, there are two types of roofing tiles: clay tiles and thick slate tiles. Clay tiles are made of fired and molded clay. They are extremely durable, but they are also heavier and more water absorbent than other roofing materials. Thick slate tiles are made from cement and fine aggregate and are lighter and less expensive than clay tiles. There are many types of roof tiles such as main roof tiles, pantiles, S roof tiles, Spanish roof tiles, French roof tiles, corrugated roof tiles, and flat roof tiles. The roofing method used to be one in which soil was placed under the roof like a townhouse, but now the dry method is used to fix the roof with copper wires and nails. Now, let's talk about the "advantages and disadvantages" of different types of roofing tiles. There are three main types of roofing tiles: metal tiles, slate tiles and clay tiles, and each material has a different performance. First, we would like to explain the advantages and disadvantages of different materials.
●Advantages ・Lightweight and highly earthquake resistant The weight of the metal tile is about 1/10 of the clay tile of the same size, which is extremely lightweight. A light roof also increases the earthquake resistance of the house. When retrofitting a traditional Japanese house, the roof may be replaced with metal tiles shaped like Japanese tiles. ・Highly waterproof The characteristic of metal roof tiles is that they are highly waterproof, with no gaps between the roofing materials laid. ・Can be used on a wide range of roofs regardless of shape As the gap between the metal tiles is small, it can also be used for roofs with a gentle slope. Metal roof tiles can be widely used in houses of any shape. ●Disadvantages ・Low heat insulation Since the metal roof tile is a thin metal, heat is easily transferred, which affects the heat and cold in the room and the air conditioning efficiency. The heat in summer can be mitigated by using heat shield paint on the roof. ・Rain sounds is loud Since the metal roof tile is a thin metal, the sound can be transmitted easily, and the sound of rain sounds more indoors than other roofs. ・It is susceptible to scratches and dents Similarly, since it is a thin metal plate, it can easily be scratched or dented, and can rust from there. ●Advantages ・Low material and labor costs Since slate roof tiles have a large production and distribution volume, the materials are inexpensive. Since it is easy for the contractor to handle, the biggest advantage is that it is cheap, including construction costs. There are many contractors and craftsmen who can handle this, so you can rest assured that you will need to repair it suddenly. ・Light weight and strong against earthquakes Since slate is lighter in weight than clay roof tiles, it is often used for seismic reform to switch from clay roof tiles to slate roof tiles. ●Disadvantages ・Short service life Slate tile is a roofing material whose material is weak against ultraviolet rays and whose deterioration over time is a major enemy. Since water tends to settle more easily than other roofing materials, peeling of coatings, moss, and algae are more likely to occur. Also, when climbing to the roof, the weight of a person often causes the slate to crack. ・Needs frequent maintenance Regular inspection and maintenance are indispensable, resulting in high maintenance costs. To keep the slate roof healthy, we recommend repainting every 10 years. ●Advantages ・Long service life It has the longest life among roofing materials, as some temples have tiles that have been over 1000 years old. ・No need to repaint Clay roof tiles are not painted products, so there is no need to repaint them. Combined with the long service life, the overall maintenance cost is low. ・High sound insulation and heat insulation The clay roof tiles are thick, so they are roofing materials with high sound insulation and heat insulation. In addition, "condensation" is less likely to occur, so you can expect to extend the life of the house itself as well as the roof. ・Easy to reuse Clay roof tiles are sturdy and can be managed individually, making it easy to reuse. Specifically, after repairing the groundwork, the same roof tile can be re-roofed, or partial damage can be repaired in units of one piece. ●Disadvantages ・Price is high The disadvantage of clay roof tiles is that they are expensive among roofing materials. Professional skills are required for construction, and the shortage of craftsmen is a factor that further increases costs. ・Heavy, low earthquake resistance The heavy weight puts a heavy burden on the house and makes it vulnerable to earthquakes. ・It is not suitable for switching from other roof tiles We do not recommend reforming a roof that already has slate or metal tiles into clay tiles. This is because the original design often cannot withstand the weight of clay tiles. Tomorrow we'll go into a little more detail on the tiles and explain the tiles in refurbishment and new construction.
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AuthorArrows International Realty Corp. Archives
June 2023
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