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There are various types of roofing materials used in residential buildings.
The choice of roofing material will affect the
advantages and disadvantages, maintenance frequency and cost,
so it is essential to carefully search for roofing materials that fit your purpose and budget.
In this article, we will provide a detailed explanation of the typical roofing materials and their characteristics.
目次
Are there many types of roofing materials?
Roofing materials can be broadly categorized into four types:
・Clay-based
・Metal-based
・Slate-based
・Cement-based
These four categories can be divided into larger groups.
Clay-based refers to roofs that use tiles.
This roofing material is excellent in durability, thermal insulation, and heat resistance, but it is heavier compared to other materials, so consideration for seismic resistance is necessary.
Metal roofs are very lightweight and easy to process, allowing for complex shapes.
While there was a time when they were said to have low thermal insulation and soundproofing, recently, products have emerged that enhance these properties by backing them with insulation materials, so the disadvantages are not significant.
Slate refers to thin plates made from schist and other materials.
As roofing materials, there are:
・Decorative slate → A material reinforced by mixing fibers with cement
・Natural slate → Slate made from materials like schist
and others.
Cement-based refers to tiles made from cement and sand.
It is common to paint them with resin coatings, which makes them quite easy to install.
Cement-based materials also include,
・Press cement tiles
・Concrete tiles
・Monier tiles
and other types are available.
Decorative slate roofs
As explained earlier, decorative slate is a roofing material made by mixing fibers with cement.
Advantages
The advantages of decorative slate are:
・Relatively low price
・Lighter and more earthquake-resistant than tiles
・Many contractors are available
These factors make it a particularly popular roofing material in modern Japanese homes.
Disadvantages
The disadvantages of decorative slate are:
・Prone to cracking
・Requires painting
・Products made before 2004 may contain asbestos
However, with a lifespan of around 20 to 25 years, it can be considered an ideal roofing material for those who prioritize cost performance.
Natural slate roofs
Natural slate is a thin, plate-like roofing material made from rock.
Advantages
The advantages of natural slate are:
・High weather resistance
・High durability
・Insulating properties
With a relatively long lifespan of around 20 years, it is ideal for those who want to focus on quality due to its higher design appeal compared to the previously mentioned decorative slate.
Disadvantages
The disadvantage of natural slate is its high price.
For this reason, it is not commonly used in Japan today.
In terms of production, it is only carried out in Ishinomaki City, Miyagi Prefecture, and is primarily imported from overseas.
The construction cost is over 10,000 yen per square meter, making it unsuitable for those looking to keep their budget low.
Tile roofs
Tile roofs refer to roofing materials that are a lightweight version of ceramic tiles.
Advantages
The advantages of tile roofs are:
・Lighter than ceramic tiles
・No repainting required
・Extremely long lifespan
With a lifespan of over 50 years, tile roofs are ideal for those who want to reduce maintenance efforts.
Disadvantages
The disadvantages of tile roofs are:
・High cost
・Heavier compared to slate and metal roofs
That’s right.
The unit price of ceramic tile roofs often exceeds 16,000 yen per square meter.
Although they can be cost-effective in the long run due to their long lifespan, significant expenses are still required during installation, so careful consideration is necessary.
Tile Roofs
Tile roofs are made from clay that is baked at high temperatures.
Advantages
The advantages of tile roofs are:
・High durability
・Partial replacement is possible
・High insulation and soundproofing properties
Additionally, there are various types of tile roofs, such as ceramic tiles, smoked tiles, and unglazed tiles, which can match:
・Western-style homes
・Japanese-style homes
Disadvantages
The disadvantages of tile roofs are:
・Heavy
・Cannot use the roof overlay method
・Not suitable for roofs with gentle slopes
・Regular maintenance, such as for plaster, is required.
That’s right.
Tile roofs have various attractions, but they are not suitable for all homes, so let’s carefully consider them while incorporating expert opinions.
Galvalume Steel Roofs
Galvalume steel roofs are metal roofing materials processed with:
・Aluminum
・Zinc
・Silicon
Advantages
The advantages of Galvalume steel roofs are:
・Lightweight and highly earthquake-resistant
・Resistant to rust
・Excellent waterproofing
・Ideal for the roof overlay method
・Can accommodate complex shapes
That’s right.
As such, Galvalume steel is a highly convenient roofing material that offers great cost performance, making it a recommended choice for many.
Disadvantages
The disadvantages of Galvalume steel roofs are:
・Susceptible to scratches
・Slightly lower soundproofing
However, when looking at the total picture, the advantages outweigh the disadvantages, so if you are looking for a balanced roofing material, please consider it as one of your options.
Metal Roof
A metal roof refers to a material that is covered with galvanized steel plates.
Advantages
The advantages of a metal roof are,
・Low risk of leaks
・Significantly reduced costs
Because metal roofs have no seams, they are less likely to leak.
Additionally, they can be installed at a very low cost, making them ideal for those who prioritize cost performance.
Disadvantages
The disadvantages of a metal roof are,
・Low sound insulation
・Low thermal insulation
・Low durability
In particular, the disadvantage regarding durability is quite significant, as the coating can peel off over time, leading to rust.
Repainting is generally required every 10 years, so when looking at the total cost, it may end up being higher.
Asphalt Shingle Roof
An asphalt shingle roof refers to a sheet-like roof coated with asphalt on the surface.
Advantages
The advantages of an asphalt shingle roof are,
・High waterproofing
・High soundproofing
・Cost-effective
・Lightweight
These roofs were previously used in countries like the United States, but they are increasingly being used in Japan as well.
Disadvantages
The disadvantages of an asphalt shingle roof are,
・Vulnerability to strong winds
・Prone to moss and algae growth
・Few contractors available for support
These are the points.
If you decide solely based on the advantage of low cost, there is a high possibility of regret after the completion of the work. Therefore, we recommend making a decision after fully understanding the disadvantages as well.
Summary
There are various types of roofing materials, each with significantly different characteristics.
The choice of roofing material can greatly affect the comfort of your home, as well as the frequency and cost of maintenance. So, let’s choose carefully while referring to what we have introduced this time.
“I don’t know which roofing material is suitable.”
“I want to choose while considering the opinions of experts.”
If you are thinking this way, please feel free to consult Kakeru Koumuten.
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AAA is a young company with an average age in the early 20s, but our technology is second to none.
One of our greatest strengths is that we can do all of our own scaffolding, roofing, and painting work. In this industry, where work is generally divided, we are able to provide a complete set of services, which saves time and effort in management and reduces costs. Above all, if there is any trouble, we will come to you right away!
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