カテゴリー別アーカイブ: Interior decorative construction work

Hello, and thank you for visiting Office Recovery and Restoration Dot.Com!

Based in Ikebukuro, Toshima Ward, Tokyo, we specialize in interior finishing and original state restoration work for offices and commercial properties across Japan.

 

In this article, we’ll introduce and explain the construction method of gypsum board, a material widely used in office ceilings and walls.

 

We’ve covered gypsum board several times in past articles.
However, we realized we haven’t gone into detail about how it’s actually installed.
Since gypsum board is usually hidden behind wallpaper or paint, its installation process isn’t often visible — and therefore not widely known.

 

We hope this article gives you a better understanding of interior board materials and how they’re used in construction.

 

Key Features of Gypsum Board

Before we dive into the installation process, let’s take a quick look at the key features that make gypsum board such a popular choice for interior construction.
Among all board materials, gypsum board is the most widely used in both residential and commercial buildings. Its key advantages include:

• Excellent sound insulation
• High fire resistance
• Cost-effective
• Easy to cut and work with
• Minimal warping or shrinkage in humid environments

 

Thanks to these benefits — especially its affordability and fireproof qualities — gypsum board has largely replaced wood-based materials in ceiling and wall construction.

 

There are also several types of gypsum board available, in addition to the standard version — including boards with enhanced strength, improved fire resistance, and better moisture resistance.
These products also come in a variety of thicknesses, typically ranging from 9.5 mm to 21 mm, depending on their intended use.

One of the most widely used options is the “Tiger Board”, manufactured by Yoshino Gypsum Co., Ltd., which is available in three standard thicknesses: 9.5 mm, 12.5 mm, and 15 mm.

 

 

 

How Gypsum Board is Installed

 

Because gypsum board is relatively thin, it requires a solid base for installation. There are four main types of base materials:

1. Wooden framework
2. LGS (Light Gauge Steel) framework
3. Concrete surfaces (using GL construction method)
4. Double-layered gypsum board (applied over existing boards)

 

1. Wooden Framework

 

While rarely used in offices or retail spaces, wooden framework is still occasionally found in apartments and detached houses.
However, it’s important to note that not all wooden buildings use wooden frameworks.

In fact, some wooden houses may use LGS (light gauge steel) for interior partition walls.
Likewise, wooden frameworks can sometimes be used even in concrete structures when specific design or construction needs arise.

Gypsum boards are attached to wooden frameworks using nails or screws, and the length of the fastener must match the thickness of the board.
Using the wrong size can lead to cracking or reduced structural strength, increasing the risk of poor workmanship or even safety hazards.

 

2.LGS (Light Gauge Steel) Framework

 

 

LGS frameworks have now become the industry standard in interior construction, surpassing wooden frameworks in both frequency and volume of use.
In fact, in most modern offices, shops, and commercial spaces, LGS is the go-to choice for partition walls and ceilings.

Gypsum board is attached to the LGS structure using self-drilling screws. As with wooden frameworks, the screw length and spacing must be carefully selected based on the board thickness.
If these installation standards are not followed, it can lead to serious issues such as board cracking, insufficient support, or even falling materials, which may result in accidents or costly rework.

 

 

3. Concrete surface (GL construction method)

 

 

When attaching gypsum board directly to concrete surfaces, screws or nails cannot be used.
In many cases, an LGS framework is first installed to support the board, but when space, budget, or construction time is limited, the GL (Gypsum Lining) construction method is used instead.

In this method, the surface is thoroughly cleaned, and a primer is applied to improve adhesion.
A special adhesive called GL bond is mixed on-site with water, then applied in dabs at regular intervals.
The gypsum board is then pressed onto the adhesive and left to set.

This technique leaves distinct round adhesive marks behind the board, which are often visible during demolition.
Because it relies entirely on adhesive, this method is only suitable for walls — not ceilings — due to gravity and safety concerns.

 

4.Double Layer Installation (Over Existing Gypsum Board)

 

To increase wall strength, a second layer of gypsum board is sometimes installed over an existing one.
In such cases, the board seams are staggered so that the joints of the second layer do not align with those of the first.

Rather than using screws, this method often employs a combination of white construction adhesive and a tacker (a heavy-duty stapler used for temporary fixing).
The tacker holds the board in place until the adhesive dries, which provides the main holding force.

This method is preferred because it improves installation efficiency and reduces labor time.

The amount of adhesive and the number of staples are predetermined.
Skilled installers ensure that the final surface is smooth, with no visible bumps or unevenness.

 

 

 

Gypsum Board Layout Methods

 

Gypsum boards are generally rectangular, and the way they’re laid out depends on the site conditions and the installer’s preferences.
In most cases, installers try to use full boards as much as possible, cutting only at the edges.
This approach helps reduce labor and material waste.

In standard applications, gypsum boards are later covered with decorative finishes such as wallpaper or paint, so the layout is rarely visible.
However, in cases like decorative ceiling boards (e.g., Gyptone)—often used in schools or hospitals—the visible layout becomes part of the finished design, so the way the boards are assigned and installed is clearly noticeable.

Here are two common layout styles used in decorative ceiling installations.

 

 

⓵. Brick Pattern Installation

This photo shows decorative gypsum boards being installed on the ceiling of a hospital.
The boards are laid out using the brick pattern, where the joints are staggered in an alternating fashion.

As the name suggests, each board is offset by half the length of the long side, creating a layout similar to traditional brickwork.

This method is also known as staggered layout, running bond, or horse pattern.

 

 

⓶．Straight Joint Pattern

 

 

In contrast to the brick pattern, the straight joint layout aligns the board seams in a continuous vertical and horizontal grid.

This method is often used when working with square or uniformly sized boards, especially in layouts where cuts are minimized and a clean, symmetrical appearance is preferred.

 

 

 

Summary

 

 

We’ve just introduced how gypsum board is installed — a material that supports most office ceilings and walls today.

• Gypsum board has become the standard in modern interiors, replacing traditional materials like plywood and solid wood.

• It is typically fixed using screws or nails to match the base structure, such as light gauge steel (LGS) or wooden framework.

• Since the surface is usually finished with wallpaper or paint, it’s important to install gypsum boards quickly and precisely to avoid unevenness.

While gypsum board is usually hidden under finishing materials, except for decorative panels, it is widely used across most ceilings and walls in today’s office interiors.

As the moving season approaches, we often receive inquiries about reapplying or replacing gypsum board after tenants move out.
If you’re planning interior work or considering a restoration project, we recommend reaching out early to ensure smooth scheduling.

Even if it’s not a request for a quote, we’re happy to answer your questions—no matter how small.
Feel free to contact us anytime!

 

※Kindly note that we provide construction services exclusively in Japan.

 

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If you’re considering interior construction work such as ceiling and wall repairs, restoration for offices or shops, or the installation and removal of partition walls, feel free to contact Office Recovery and Restoration Dot.Com.

We also handle projects related to office relocation, move-in/out support, and full-scale renovations.

From initial consultation and quotation to final construction, our team handles everything in-house, ensuring cost efficiency, high quality, and reliable service.
You’re welcome to compare our estimates with others—we are confident in both our pricing and workmanship.

If you have questions like:
“How will this be done?” or “What’s a reasonable price for this kind of work?”
—feel free to ask us anytime. We’re happy to help.

We also invite you to follow us on Instagram, Twitter, and Facebook for updates and photos from recent projects.
Look for the three colorful icons at the bottom of the page!

📍 Please note: Our construction services are available only within Japan.

 

～～～～～～～～～～～～～～～～～～～IKEBUKURO～～～～～～～～～～～～～～～～～～～～～

★ For high-quality interior construction and reliable restoration work in Tokyo,
trust Office Recovery and Restoration Dot.Com
— your trusted partner from planning to completion. ★

〒171-0014

Address: 4^th floor, Musashiya No.3 Building, 62-10, 2-chome, Ikebukuro,
Toshima ward, Tokyo

Free phone: 0120-978-226

～～～～～～～～～～～～～INTERIOR DECORATIVE WORK CONTRACTOR～～～～～～～～～～～～～

This topic is also explained in detail in our Japanese-language blog.

オフィスの天井・壁のほとんどを支える石膏ボードの施工方法をご紹介

Hello, everyone！ We here are Office recovery and restoration Dot.Com. website.

Having been setting up our company office at Ikebukuro, Toshima ward, Tokyo, we are an interior decorative construction work contractor, mainly taking charge of Interior decorative finishing work・Original state recovery and restoration work in all over Japan.

Concerning office interior decoration, please talk and/or take counsel with us on anything light heartedly.

 

 

 

Today, we are introducing and explaining『niche』.

 

 

In the first place, it seems that you may not get used to hear the word niche.

Often used implications for the business are,「Niche industry」and so on.

All in all, it is of-the-niche industry, isn’t it?

What is often seen in Japan is katakana notation of「ニッチ」.

However, originally, it is written as an English word of「niche」.

It seems that it mainly means「niche」,「ecological system」,「shelter」.

It seems that its implications and usages are different, according to the fields and scenes.

 

This time, we are explaining「niche」which means as a terminology of architecture.

The following is a reference from kotobank.jp website.

 

In Western style construction, a concave part made by hollowing out a thick wall.
A carved statue, flower vase, and so on are placed. Niche

Reference: What is niche? The meaning and usage-kotobank.jp internet website

 

What is niche?

 

Niche is a space which was made by hollowing out a wall to 凹 shape.

By utilizing this 凹shape, we can use it as the interior accent and the storage space.

Generally, by using the wall thickness of niche and let it have profoundness, we make  a space for storing goods and/or decorating it.

Usually, it is made by letting the wall cave in about 5～10cm. However, the profoundness and the size can be adjusted according to the installing place and the purpose.

 

 

The structure of niche

Basically, generally, niche is a space partially hollowed out by a wall. It is generally made in a structural stable partial place.

There may be those who tend to wonder if it is OK to hollow out a wall?

Usually, when we will make niche, we surely take care of the following points and make one:

 

 

◎The structure

When installing niche, we select a place which does not influence the building strength.

For example, by avoiding to install in bearing wall and important supporting structure, we avoid structural problems.

As for the wall which is supporting a housing structure, if we concave it, chances are that the entire housing strength may be influenced.

What kind of wall is appropriate for it? If we give an example, it is:

 

 

◎Non-structural wall (partition wall)

A regular wall such as partition wall and so on are the most appropriate to make niche.

As it does not support the housing structure, it is relatively easy to be able to concave it.

◎Electrical wiring and equipment

If it is piped and/or wired in the wall, it is necessary to avoid them to make niche.

In order to confirm inside the wall, it is convenient to confirm the drawing data and to use the special detector.

 

 

The interior decorative finishing of niche

 

Inside of niche, it is possible to apply the materials and finishing according to the design and the usage.

As the making method of the wall is the same as usual one, it is possible to do its finishing of  interior decoration widely.

However, it may come to change according to the wall groundwork materials too.

 

• ・Sticking tile finishing
• ・Painting finishing
• ・Sticking so-called decorative cloth finishing
• ・Sticking wooden panel finishing

Various finishings are possible as above.

 

In order to highlight niche, it is also possible to install a light in it.

For example, indirect light, spot light, and so on, these lights are used to match the design.

 

 

 

The usages of niche

 

Niche is often used as a decorative shelf, and it can be used for various usages.
If we go on raising concrete examples, there are following usages:

 

・Storage space: It can be used as a shelf for storing books, magazines, CDs, and so on.

・Decorative shelf: It can be used for a space to decorate art works, family pictures, memorabilia, and so on.

・Interior accent: In order to let the wall surface have alteration, a decorative niche is placed sometimes. Particularly, by combining with indirect light, it is possible to add accent to the entire wall design, which will show a stylish feeling.

・Equipment storage: There is a niche for storing remote controller, switch, interphone, and so on too. It will become a neat appearance impression.

 

Referring to the above, we think we would like to introduce and explain a niche work in the toilet interior decoration this time.

 

 

 

The construction site example

 

The construction site example which we executed this time is, an office toilet interior decorative finishing in a sheet metal factory, located in Odawara city, Kanagawa prefecture.

 

 

 

 

 

 

We executed LGS(=light gauge steel)・PB(=plaster board) construction on the groundwork, made a hollow in the niche wall area, applied so-called decorative cloth, and installed an indirect light in the niche ceiling area, which has made a stylish feeling.

As the toilet interior decoration this time is a work with niche, it has become a stylish and spacious space.

 

 

Summary

 

Niche designing and interior decorative finishing greatly influence the entire r room feeling.

How to finish niche is important for selecting its method, according to the room style and the purpose.

Please try to make up a stylish niche with reference to this blog by all means!

By utilizing niche, we are sure that the interior decoration will be further more charming.

Concerning your inquiry and talk on niche work, please contact us light heartedly!

We are willing to help you make the interior decoration more charming and more functional.

We will provide our work and service to you, by considering to put our customers’ satisfaction as the top priority. So, please give us your work requestr by all means!

 

※Please understand that we will execute construction in Japan only.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

If you are considering to request us office building・tenant(shop or store）original state recovery and restoration work, moving in work, relocation, removal, reform work, and so on, please contact our company light heartedly by all means!

 

 

InstagramTwitter  Facebook  

You can also give us your relative inquiry from SNS social media.
Please be sure to see it together.

 

From price quotation up to construction work completion, our company is directly managing and doing construction work by ourselves.
Our aim is, to supply「reasonable construction work as much as possible,
with high quality, better work service」to our customers.

 

◆If you look for interior decorative work・Returning to original state and restoration work in Ikebukuro,Toshima ward, please visit Office restoration Dot.Com.◆

 

〒171-0014

Address: 4^th floor, Musashiya No.3 Building, 62-10, 2-chome, Ikebukuro, Toshima ward, Tokyo

Free phone: 0120-978-226

 

Japanese Blog　↓

ニッチとは？｜事例：神奈川県小田原市 トイレ内装工事

Hello, everyone！ We here are Office recovery and restoration Dot.Com. website, a personnel in charge.

We have been setting up our company office at Ikebukuro, Toshima ward, Tokyo, and we are an interior decorative work contractor, mainly taking charge of construction of Interior decorative finishing work・original state recovery and restoration work in all over Japan.

 

This time, as one of Terminology series after a certain time, by going back to the basic, we are introducing and explaining『light gage steel』once again.

I briefly do the roundup in my own way, then I am going to introduce it to you based on the construction pictures.

As this article is easy to read through, please browse it light heartedly.

 

What is light gauge steel?

Light gauge steel (LGS) is a construction material made by cold forming of thin steel.
It is widely used as a structural material of architecture.
While its weight is light, it has high strength too.
So, it is variously used in the places such as housings, commercial facilities, industrial use buildings, and so on.

 

The silver-colored material installed in the ceiling and wall is LGS.

 

 

The feature of LGS

 

「Light weight」-ness also in its term name

Compared with the conventional steel frame, it is very light.

As its transportation and construction are easy to do, it is used in a lot of construction sites.

 

※Conversation only here confidentially:

It is lighter than other conventional steel frames.
But, when we are asked if it is possible even for a female also can easily hold it, we will answer that, although it is relatively lighter than other construction materials.
But, whether even a female feels that she 「can hold it easily or not」, it depends on the size and length of the steel frame, and each person’s physical strength too.

LGS pillars and beams change the weights according to the cross-section area and length.

Generally, the weight of a piece of LGS steel frame varies from about a few kilograms to a few tens of kilograms.

However, it is also important in the lifting up pose and holding way.

If it is small sized, it may be easy to hold it.
But, if it is long and thick, the weight balance is sometimes difficult to keep it.
Chances are that it may be difficult only for one person to move it.

As the safety side is considered, moving it by plural persons and using appropriate equipment are recommended.
So, in the case of only one person will move or make landing it, let’s be careful!

 

 

Steel frame in its typical highly「strength」

While its weight is light, as it has very high strength too, it is suitable for a building where earthquake resistant property and durability are required.

If we briefly explain tensile strength of steel used for LGS, it seems that「Even if we hang the steel of every 1 square millimeter cross-section area like thin needle of it(=structural steel) on the steel frame of the weight about 40～55 kilograms, it will not be broken.」.

 

Material quality in its typical「durability」performance

Steel material is resistant to corrosion and insect damage.
So, it will exhibit its stable performance for a long time.

As for its durability, it is usually said that the duration of life is 50～100 years.

In the case of appropriate designing and protection are applied, it is possible to use it within this range without any problems.

However, if the problems of rust and/or corrosion go fast, depending on its maintenance, the durability of life may be shortened sometimes too.

 

For your reference, in the case of using it as a building interior decorative groundwork, as the groundwork of a ceiling and wall, compared with wooden material, it is lighter and has more strength too.
Therefore, it is recommendable to use it, as it has a high long-term durability.

 

The merits of LGS

 

The freedom of designing

As abovementioned, LGS is light, and has high strength as well.
As you can choose one from various cross-section shape type, such as C type, L type, and so on, it is a material whose freedom of designing is very high.

As you can take column interval wider than wooden material, you can secure a large space. An open and few pillar design is possible.

As it is also easy to process it in the work site, and fine adjustment and complex shape corresponding can be easy to do too, it is suitable for curvilinear design and special interior decoration too.

 

In addition, as it is possible to flexibly correspond to extension, reconstruction, and renovation, it can be easily correspond to change the design in the future too.

As it is used in various buildings such as housings, commercial facilities, factories, and so on, LGS is an excellent construction material which will realize free design for wide usages.

 

Safety

As the reason of its high earthquake resistant property, you can also use it in earthquake frequently striking areas with ease too.
And, also as for fire breakout, it has a certain fireproofing property.

The reason why the earthquake resistant property is high is, as its name suggests, LGS is light. So, as it can control the weight of entire building, when earthquake strikes, the burden of earthquake shaking becomes small.

In addition, as steel frame has strength and tenderness together too, it also flexibly corresponds to earthquake power.
So, the damage and injury can be controlled to minimum.

 

The construction site example of LGS

We are introducing and explaining a part of construction site example.
LGS is being widely applied to the following architecture.

 

Housing

 

 

LGS is being used as a structural material of the living space such as in single-family dwellings.

It ts light and has highly strength, multiple dwelling, and so on.

As it is light and has high strength, it is the most suitable to the building where earthquake resistant property and durability are required.

 

Commercial facility

 

 

It is the work of a tenant in a commercial facility.
It is the state of making the groundwork of curved wall.

 

By using R processed runner (rounding corner processing) , it is possible to make a built-in gypsum board wall which has designability.

 

summary

LGS is a very excellent construction material which is light, and has high strength and durability.
The freedom of designing is high, so, it is being widely used for various buildings, such as housings, commercial facilities, and so on.
As it is also excellent in earthquake resistant property and fireproofing property, it can secure safety, more and more demands are being expected continuously.

 

Finally

 

Our company is taking charge of a lot of interior decorative work and original state recovery and restoration work by using LGS.

If you are interested in these, please give us your inquiry from the following「inquiry」light heartedly!

 

 

お問い合わせ

※Please understand that we will execute construction in Japan only.

 

 

 

---

 

If you are considering to request us office building・tenant(shop or store）
original state recovery and restoration work, moving in work, relocation,
removal, renovation work, and so on,
please contact our company light heartedly by all means!

 

Instagram     　X　    Facebook  

You can also give us your relative inquiry from SNS social media.
Please be sure to see it together.

 

From price quotation up to construction work completion,
our company is directly managing and doing construction work by ourselves.

Our aim is, to supply
「reasonable construction work as much as possible,
with high quality, better work service」to our customers.

 

---

 

If you look for interior decorative work・
Returning to original state and restoration work in Ikebukuro,
Toshima ward, please visit Office restoration Dot.Com.

 

〒171-0014

4^th floor, Musashiya No.3 Building, 62-10, 2-chome,
Ikebukuro, Toshima ward, Tokyo

Free phone: ０１２０－９７８－２２６

 

【用語解説】軽量鉄骨の用途｜内装下地