In this video we see the best way to make a flat roof or flat roof. We will show the materials for a flat roof, how we make the slab, all the parts of a flat roof, how we make the flat roof slope. Link aerotermia- • AEROTHERMIA is not the best option ... Link article - https://autopromotor.info/construir-u... I want to apologize because on several occasions I am wrong when I say asphalt fabric and butyl fabric since for us it is like Coca Cola, that we say the brand for all types of cola, the same thing happens to me with asphalt fabric. I wanted to make a video with the power point and it has taken me a lot of work, I have repeated it several times and it did not end up being right, I have decided to publish it and in case it creates confusion I will repeat it later. The finishes that can be given are: covered with gravel, wood or soil for a garden. In the video we will see all types of flat roofs. Many self-promoters like modern houses with flat roofs. Whenever I recommend them and give them my opinion, I notice that there is a great fear of having problems with humidity or condensation. We will see the advantages and disadvantages of flat roofs. Another issue is where to put the insulation in flat roofs, as we see in the video, in many cases they cause problems or it is useless to insulate from the top. The insulation that is usually used is sprayed polyurethane, XPS panels, sometimes they make slopes with cork which is not heavy and insulates or with cellular concrete. We also deal with the thermal bridges of flat roofs. In this video we talk about modern houses made with a concrete structure, as they are concrete roofs they are flat roofs which if you put a railing on them they are a walkable flat roof. In this type of roofs, asphalt fabric or EPDM butyl fabric is usually used. Based on my experience and the flat roofs I have built, flat roofs made with asphalt fabric, after 10 years, water bubbles start to appear between the 2 sheets of asphalt fabric and when the direct sun hits the walls, it starts to melt, dry out and holes appear which cause problems. This makes maintenance expensive since the holes have to be covered every now and then. For this reason I use EPDM butyl fabric which to date has not caused any problems or humidity. On asphalt fabric they give you a 10-year guarantee and on EPDM butyl fabric the guarantee is 20 years. Many architects say that you can leave EPDM butyl fabric outdoors without covering it with anything, this is true, but the materials of the joints are pierced by bees and due to the expansions and changes in size of the butyl fabric, it rises and the drain becomes dislodged, this causes problems with humidity and leaks. The best thing to do is to put a layer of geotextile and weight on top, whether it is a gravel cover, wood, floating tiles or garden soil. This weight keeps the fabric in place and prevents bees from reaching the fabric. We all know that the top floors, especially attics, are always hotter because normal insulation insulates the change in temperature inside and outside, but solar radiation is what heats the roof and top floors. On a flat roof for less than 5 euros per square meter we can put an anti-radiation sheet and in this way the covered floor will reflect 98% of the radiation and will always be cool.