If you decide to order metal doors from the manufacturer, then you will have to take care of the threshold for the new metal front door. To replace or install a new threshold, it is best to purchase an oak product, since it will last a long time compared to softer wood. When installing, the threshold is treated with varnish, stain or impregnation. To eliminate irregularities, the surface needs to be prepared for work. It is necessary to clean from dust and garbage, eliminate defects, make cracks, remove exfolved pieces.
The surface must be treated with a primer — this is how the clutch of the screed and concrete will ensure. If it is planned to make a small step, then by its size you need to make formwork from the boards, and then pour the mixture. In the solution, the water content should not be exceeded, otherwise the strength of the screed will be lost and the tubercles will appear. The mixture must be stirred until a thick dough is formed, avoiding the formation of lumps. For work you will need a special nozzle for a perforator or drill.
The solution is consumed within 1.5-2 hours, otherwise its properties will be lost. Need to pierce the bubbles. For about 10 days, the solution must be wetted to avoid drying cement. When using special glue from above, you can put the floor tiles, and smear the seams with a putty. Outside, you can lay out paving slabs.