I did not know that it is impossible to cut steel sheet grinder: this is the result

Dear subscribers channel "build-built", as well as all those who came to my channel for the first time - hello!
Today will be the story of my bad experience (And although not yet write about their successes, such as the installation of "smart house" system).

So, not so long ago, I discovered that You can not use grinders (USHG), to cut steel sheetFrom which we, the Russians (and friends of Belarus and Kazakhstan, I think, too) love so much to do at the cottage fences and roofs.

The material is very easy to use - a large coverage area, durable, impermeable - super. But here's the thing: Bulgarian is cutting it very messy. It destroys the polymer coating, which is now protected steel sheet, and he is covered with rust. Here are my results:

Just the bottom edge of the door and I clipped the grinder, and on top let the good, the factory cut.

"Galvanizing had to take" - I swaggered neighbor - and at the very edge of one year of galvanized sheet is also rust has gone! This is not the old Soviet "galvanizing", who remembers ...

I talked with smart people and found that manufacturers are cutting back on rustproofing trapezoidal sheet - cover cheaper polymer composition, of which I destroyed grinder.

Learn from my mistakes!

At the beginning of the article I mentioned his success with "smart house" system, here's a link to the article "How do I pay for heating of 1500 rubles per month in winter".