To replace rotten exterior beams with concrete, you will first need to remove the existing beams by cutting or prying them out. Next, you will need to prepare the area by ensuring it is clean and level. Then, you can construct formwork to mold the concrete into the desired shape and size. Finally, pour the concrete into the formwork, allow it to cure properly, and then remove the formwork to reveal the new concrete beams. **

To build an exterior concrete wall using construction tile adhesive, the first step is to prepare the surface by cleaning and leveling it. Then, the adhesive is applied to the back of the concrete tiles and pressed firmly onto the wall. The adhesive is allowed to set and cure, creating a strong bond between the tiles and the wall. Finally, grout is applied to fill in the gaps between the tiles and provide a finished look. This method provides a durable and weather-resistant exterior wall. **

Concrete dust can have negative effects on health when inhaled. The fine particles in concrete dust can irritate the respiratory system, leading to coughing, wheezing, and shortness of breath. Prolonged exposure to concrete dust can also cause chronic respiratory issues such as bronchitis or even exacerbate existing conditions like asthma. In addition, concrete dust may contain harmful substances such as silica, which can lead to lung diseases like silicosis when inhaled over time. Therefore, it is important to take precautions to minimize exposure to concrete dust, such as using proper respiratory protection and ventilation when working with concrete. **

Not all houses from the 1960s contain asbestos in their exterior plaster and deeper concrete. Asbestos was commonly used in construction materials during that time, but it was not universally used in all buildings. It's important to have a professional inspection to determine if asbestos is present in a specific property, as it can pose health risks if disturbed. If asbestos is found, it should be safely removed by a certified abatement professional. **

Without further context, it is difficult to determine whether the exterior facade is frozen. If the question is referring to the temperature causing the facade to freeze, then it would depend on the current weather conditions. If the question is asking whether the facade is unchanging or stagnant, then it would require more information about the specific situation. **

To apply concrete on concrete, the existing surface must be clean, free of debris, and properly moistened. A bonding agent or primer should be applied to the existing concrete to ensure adhesion. The fresh concrete mix can then be poured or pumped onto the existing surface and spread evenly using a screed or trowel. It is important to properly cure the new concrete to prevent cracking and ensure a strong bond between the two layers. **

Yes, it is possible to pour new concrete over old concrete as long as the existing concrete is in good condition and properly prepared. The old concrete should be clean, free of any loose debris, and roughened to provide a good bonding surface for the new concrete. Additionally, a bonding agent may be used to ensure a strong bond between the old and new concrete. It is important to consult with a professional to assess the condition of the existing concrete and determine the best approach for pouring new concrete over it. **

For setting lawn edging stones, garden concrete would be the better option. Garden concrete is specifically designed for outdoor use and is more durable and weather-resistant than concrete screed. It also has better adhesion properties, making it more suitable for securing the edging stones in place. Additionally, garden concrete is often formulated to be more resistant to cracking and shifting, which is important for maintaining the integrity of the lawn edging. **