Which roofing material to use to prevent hail best?

Recently, hail in the northern provinces such as Ha Giang, Lao Cai, Lai Chau, Son La, Cao Bang and Yen Bai caused deaths, thousands of houses were damaged.

Explaining this phenomenon, Prof. Dr. Tran Thuc - former Director of the Institute of Meteorology, Hydrology and Climate Change, said that this is the result of the transition from winter to summer. When monsoon comes, cold air appears to push the air up, creating disturbance, large convection and causing hail. The phenomenon usually occurs in the northern mountainous areas - where the dispute between the upper cold air mass and the hot air below.

"The hail phenomenon of such a large size is very dangerous but not unusual, in the past it has happened. The extraordinary thing is the high density , " Mr. Thuc said.

Heavy hail like a chicken egg made many families fall into the sky.

Regarding the issue of large hail affecting the homes of people, PhD. Architect Ngo Doan Duc - Chairman of Vietnam Architect Association, said he disagreed with the idea of ​​using cement materials for roofing because the structure is easily destroyed due to heavy rainfall. , dense, intense.

" Proximang material is dangerous, unusable. These compression tablets are fragile, unable to withstand hail-sized arms like that. In the immediate future, to overcome the consequences can only use corrugated iron roofs, including corrugated iron. This is a kind of roofing material, overcoming the impact due to hail made from iron and zinc. And proximang, which can withstand very short time, then easily destroyed, " Mr. Duc said.

This expert said that corrugated iron roofs are materials that can be overcome against natural disasters , while other materials need to be warned of danger levels. In addition, the authorities need to quickly disseminate the roofing of corrugated iron to ensure the safety of people against long-term hailstones that cause roof puncture or complete house collapse.

"We have to include both timely and long-term remedies. It is possible to make corrugated iron sheets, upgrade them promptly, replace roofs and rudimentary roofs destroyed by hail. In the long run, it is necessary to must consider the most active materials in terms of price, convenience for builders, providing for people to fight hail, " said Duc.

1. Why is hail, how to prevent hail
2. 10 things you probably didn't know about hail