Need to build a much larger staircase than the small one. Along the entire entrance roof. 330cm.
The height to the top level will be 470mm.
For the steps, I will use 28x120. The height of these must not exceed 120 mm. Three planks deep for each step.
The current one is too small, too steep, and looks bad...
How would you do it? Build the staircase directly against the existing one or elsewhere and then attach it to the house?
Are you planning to build the staircase at an angle? (it looks like you have a porch at an angle)
Otherwise, I would probably make 5-6 underlying stringers from beams (45x120) stacked on each other, which you attach together with a vertical decking board at the back and then also at the front on each level.
Once these are made, you can place the treads' boards on the bottom and next-to-bottom landings, secure them with angle brackets to the existing porch at the top and bottom, and support underneath at the front (if needed) to finally place the tread on top, and also the risers if you want them. Just make sure to account for any overhang of the risers when placing the treads and cutting the length of the stringers.
4 step heights * 12 cm = 48 cm, so a staircase with 3 steps is reasonable, and then either remove 3-4 mm on each beam in the stringers or let the bottom step be lower.
If you are planning to make the staircase at an angle, it is the same process but with a stringer at a 45-degree angle in the corner and considering attachment for the other part.
Have basically built as you describe. From leftover material. 28x120 used for everything. 6 stringers. First, I drew everything on a 24mm chipboard. Drew until I got it right. Made the first stringer. Then secured parts with a few wood screws. Copied 5 more...
On Thursday, the staircase will be screwed. A straight staircase. Will try to upload the photo of what I did...
