If the slate cracked
Cracks of wavy asbestos-cement roofs can be repaired by pasting a piece of roofing felt with a hot two-wave bitumen by melting hot bitumen. The upper end of the roofing material should be pushed under the above slate leaves.
How to repair a grindstone.
The serrated grindstone can be repaired with cement mortar, which consists of one part of 300 grade cement and four pieces of fine and fine quartz sand. A piece of plywood is pressed against the lateral surface of the circle by a clamp. The serrated area is moistened with water, filled with a solution, smoothed and left to full hardening.
If the slate cracked
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