If one must know how the concrete wall is reinforced, and where those rebar members are, or else inshort we can say that when you knock on the concrete walls, they do not make any.
How To Make A Wall Look Like Concrete. This technique takes a little skill it's possible to spray concrete onto a wall using a hopper spray gun. This is a way to make concrete look like something else;
How to Paint a Wall to Look like Stone | Paint Techniques ... from i1.ytimg.com
Ugly blocks need rendering & painting just to make them look ok. Use a concrete formulated for this purpose, as well as a gun designed for this. The look is both soft and contemporary, works well in urban environments, and is still livable.
Creating a wall is big work, so consider contacting a professional for help or advice to ensure you get a the cheapest and easiest material to use is 2 in × 4 in (5.1 cm × 10.2 cm) boards cut from a softwood like pine.
Anyone can make an ugly lump, but with a little more thought a block wall can be pretty, characterful and a pleasure for the eye. These moulds make ugly looking concrete look like masonry design. This article is about making concrete blocks for good looking walls with character and quality. Surecrete products change everything you thought concrete should look like.