The video features Pavel Sidorik, a DIY enthusiast, working on a project to alter a Khrushchev-era apartment. He is making a floor screed, which is the last major piece of hard work required in the project.
Pavel explains that the original floor was made of wood on logs, which he dismantled, leaving a space of 8-12 cm with a 4 cm drop. He wants to create a screed to restore the original floor level and ensure the floor fits properly with the window and door.
Pavel considers various screed options, including Knau Superfloor, expanded clay backfill, and GVL sheets. However, he decides against Knau Superfloor due to its tendency to settle over time, incompatibility with tile floors, and vulnerability to flooding.
Instead, Pavel chooses to use a conventional sand-cement screed with a lightweight aggregate, specifically fine expanded clay and XPS extruded polystyrene foam. He believes these materials complement each other, providing a durable and sound-insulating screed.
Pavel explains the characteristics of expanded clay and XPS, highlighting their benefits, such as being relatively cheap, providing heat and sound insulation, and being lightweight. He also mentions the importance of using a damper tape to compensate for linear expansions, provide noise insulation, and protect the wall from the screed.
The video then shows Pavel preparing the base for the screed, using a laser beam to level the surface. He experiments with different techniques for mixing the expanded clay with cement and decides on a method that involves mixing the expanded clay with cement and then adding XPS sheets.
Pavel also discusses the importance of using a plasticizer to make the screed mixture more durable and plastic. He demonstrates the difference between a mixture with a minimum amount of water and one with a maximum amount, highlighting the benefits of using a plasticizer.
The video concludes with Pavel calculating the cost of different screed options, including a ready-made screed, a DIY screed made from sand, cement, fiber, and plasticizer, and a dry-pressed screed. He finds that the dry-pressed screed is the most cost-effective option, especially considering the convenience of not having to lift the material to the fifth floor.
The video ends with Pavel showing the completed screed, which was made using a dry-pressed screed technology. He notes that the screed is ready to walk on after 12 hours and can be spilled with water several times during the week to increase its strength.
Here are the key facts extracted from the text:
1. The project is called "Alteration of Khrushchev from A to Z. Screed".
2. The host, Pavel Sidorik, is making a floor screed.
3. The original floor was made of logs, but it was dismantled.
4. The new screed must be 11 cm thick to restore the original floor level.
5. The screed must be lightweight because the house is 64 years old and the floor slabs cannot hold heavy loads.
6. The screed must have elementary soundproofing properties.
7. The screed must be suitable for any coating, including laminate, linoleum, and parquet.
8. Pavel considered using Knau Superfloor, expanded clay backfill, and GVL sheets, but rejected it due to its softness and potential for water damage.
9. Pavel decided to use a conventional sand-cement screed with a lightweight aggregate, such as fine expanded clay or XPS extruded polystyrene foam.
10. Pavel chose XPS Carbon ECO extruded polystyrene foam with a thickness of 3 cm.
11. The damper tape is made of 10mm polyethylene foam and serves three purposes: compensating for linear expansions, noise insulation, and protecting the wall from the screed.
12. Pavel used a homemade screwdriver hook to knit the mesh.
13. The screed base is leveled using expanded clay mixed with cement.
14. The optimal amount of cement and water for a 20 kg bag of expanded clay is 7 scoops of cement and 6 liters of water.
15. The screed is made of a mixture of sand, cement, and plasticizer, with a minimum amount of water.
16. The screed is poured onto the base and distributed along the laser beam.
17. The screed is then covered with a layer of XPS sheets.
18. The total cost of the project is 786 Belarusian rubles, 386 dollars, or 24,700 Russian rubles.
19. The cost of working on the screed is at least $8 per square meter.
20. The dry-pressed screed technology is the most optimal for this project due to its cost-effectiveness and ease of use.
21. The dry-pressed screed is distributed over the beacons from the solution, with a minimum layer of 4 cm.
22. The screed can be walked on after 12 hours, and it is advisable to spill it several times during the week to make it stronger.