Tools needed : tape measure, spirit level, impact drill (preferably pneumatic), cordless screwdriver with extended attachment - Torx 30, 6 mm concrete drill bit, 6.5 mm panel drill bit, low-expansion foam, silicone gun, butyl sealant, washers of various widths, wedges, turbo screws, vapor barrier tape for exterior and interior with bitumen, vacuum cleaner, foil for covering the floor, PZ2 screwdriver bit, snap-off knife. steps. 1. Correct focus (the most important step!)