I explain why, when laying blocks, I pull two mooring threads

When laying any blocks and even bricks, pulling the mooring thread is mandatory. Necessary for even laying in vertical and horizontal planes.

But those who follow the publications describing my process of building from aerated concrete should have seen that I was pulling two parallel strands:

Everything is clear with the upper nylon thread: it is stretched from the corner of one block to the corner of the other extreme. And the first corner blocks are installed strictly according to the level. It turns out that the whole row goes straight and horizontally along the upper thread.

Yes, you can do with only one top mooring thread. But why the thread is pulled in the middle of the block, that it encircles the perimeter of the house, is not clear at first glance:

The bobbin thread is used to control the position of the corner blocks. The thread should not fit snugly against one face of the block and should not recede far from the other face. Those. this thread controls the right angle of the house so that after a few rows the masonry of the walls does not turn into a trapezoid. A situation is possible when the planes of the walls are observed, and the corners have floated.

Another double control of the masonry will not hurt anyone - it will increase the accuracy. Imagine that in the process of work, the upper thread is deflected by a block and all subsequent ones will be piled out. To prevent this from happening, it is recommended to place the mooring thread 2 mm from the edge of the corner block.

A thin sliver or nail is placed under the thread.

The lower thread is still convenient to control the vertical plane of the wall, and the upper one - whether the block falls inward or outward.

As you can see in the photographs, for these markers I purchased a red nylon thread. It can be clearly seen on the white background of the masonry. I do not recommend white thread - it will merge with the blocks, especially at dusk, when you finish your work.

But I was surprised that ultraviolet light and aerated concrete dust destroy the nylon thread. A few months later, she turned white and began to tear like cotton. On the second floor, I had to use a new thread.

The beginning of the laying of the interfloor row. Masonry also with two mooring threads

A couple more tips on pulling the mooring thread in this video:

For those who plan to build a house from aerated concrete, I recommend watching other videos from this channel. There are many tips that you can apply when doing everything yourself.

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Photos of the author (c)

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