Window sill installation

In this video, I will take a step-by-step analysis of how to properly install a window sill in an apartment. Window sill installation is not as complicated as it may seem. Everyone can do it on their own, without the help of builders.
First, remove the old window sill, clean the surface from the old cement. Then proceed according to the steps prescribed in the video.
I hope this video was useful to you, thank you.
1. Dismantle the old window sill
2. Drill and insulate the support profile
3. Mark and cut out the left niche of the window sill attachment
4. Checking the final result
5. Prepare and install the formwork for pouring
6. Fill the new surface for the installation of the window sill with cement
7. Mark and cut out the right niche for fixing the window sill
8. Install the window sill by controlling the level
9. Prime the adjoining plastic and walls with an adhesive primer
10. Close up small irregularities with Uniflot putty
11. Preparing the slope panels for installation, do not forget about the hole for the outlet
12. Install the starting profile and support for the slope
13. Install the slope on the foam
14. Repeat the previous procedure With the upper slope
15. Remove all irregularities with Uniflot putty