Slate stone has its Vietnamese name of split rock, slate, and rock. The most common name is Lai Chau Stone – after the place of origin of this stone.
Lai Chau Slate stone is mainly used for roofing, tiling, decoration … Because since it was first exploited in Vietnam, Slate stone has been put into the roof of the Hanoi Opera House (FRENCH COLONIAL PERIOD).
After that, many Thai ethnic groups in the Northwest in Viet Nam also used this stone to the roof, the slate stone has brought especially look to the Northwest roof.
Let’s find out about Lai Chau slate with Natural Stone!
Da Lai Chau has the scientific name of Slate Stone, distributed only in Lai Chau Province of Vietnam. They also have other names such as slate or split, curb, ardoise.
Slate is a fine-grained stone formed from clay mud, including sediments, organic matter … hardened due to high temperatures and pressures undergoing more than 300 million years under local conditions. a special substance.
The difference in geology has created a famous Lai Chau stone today. Lai Chau Slate is not only popular in Vietnam but also internationally recognized as the best quality slate in the world.
Slatestone is very suitable for roofing, tiling, interior, and exterior decoration… The natural black color of Lai Chau Stone has created a luxurious and ancient look, especially the black stone roof in French architecture, Neoclassical architecture …..
With the advantages of Lai Chau Stone – slate – split stone is also used in the construction of miniatures, fountains, wall tiles, pillar tiles, paving the garden paths …
Slatestone has its Vietnamese name of split rock, slate, and rock. The most common name is Lai Chau Stone – after the place of origin of this stone. Lai Chau Slate stone is mainly used for roofing, tiling, decoration …
Because since it was first exploited in Vietnam, Slate stone has been put into the roof of Hanoi Opera House (French domination). ).
After that, many Thai ethnic groups in the Northwest in Viet Nam also used this stone to the roof, the slate stone has brought a unique look to the Northwest roof.
Roofing stone that ordinary people call slate, slate or split rock appears in the northern mountains, concentrated mainly in Lai Chau province.
Therefore, it is often called Lai Chau stone, the name associated with the place of its birth. Large reserves and more uniform quality are concentrated in Hat Xum quarry (Nam Ban, Sin Ho, Lai Chau communes). This open pit is located next to the Nam Ban River, so in the past, people around the area exploited stone for roofing.
The stone is peeled off in large pieces. Because the rock has only one grain, this stone is called slate. The name of split stone comes from the way of exploitation.
Before splitting the stone, miners have to cut through the grain, then use different types of wedges to peel off into thin layers. Lai Chau stone has two types: black stone and colored stone.
Many people think that black stone is due to oxidized polychrome (colored stone) but in reality, it is not so. over 200 million years.
For roofing, people split stones into 30cm square tiles, 4mm thick. Two crisscross squares have to be cut so that their eyelids overlap.
A square top is punched in a small hole. When roofing, people pierce through steel holes and tie into rafters. The two tables next to each other only have a few eyelids.
In Vietnam, many major buildings built during the French colonial period such as Hanoi Opera House, Hanoi Post Office, …are all roofed with stone roofs.
When using slate, after mining and processing, it is most important to handle the stone before being put into use. Even in terms of roofing, one must know how to calculate the slope and how to protect the tiles.
The method of cross-linking of ethnic minorities is only suitable in areas with little or no wind.
One of the advantages of Lai Chau stone is its long life. Stone tile can be used for 100 years. It does not transmit heat and does not absorb heat, so the roof with a stone roof is quite cool.
Without calcium constituting, shale is not corroded acid. Thanks to the quite special structure, so when separated, the slate has a fairly flat surface, creating natural beauty, recently, in addition to using it as a roof, architects also use slate to tiling, decorating.
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