Staircase with different step heights

  • Erstellt am 2020-04-24 10:49:37

julianpe

2020-04-24 10:49:37
  • #1
Hello everyone,

we had a concrete staircase (cast-in-place concrete) poured in our new single-family house. Unfortunately, the construction planner failed to measure the staircase after the formwork was removed. Yesterday, a stair builder was on site to take measurements and saw that the stair steps have a maximum height difference of about 2.5 cm. This definitely needs to be repaired. He recommended leveling these heights with OSB boards. Later, a wooden step is supposed to be glued on as the step covering.

Here are my questions to you: The staircase was poured in August last year. Does it still have residual moisture? Or does the concrete staircase need to be treated with an impregnation/sealing coat? I am afraid that the wooden steps might swell later, etc.

Furthermore, I am surprised that the stair builder wants to realize the height adjustment with OSB boards. Ultimately, that would be an additional layer that has to be glued. Wouldn’t it be more sensible to level the step height with concrete?

Thank you very much in advance

Best regards Julian
 

rick2018

2020-04-24 11:04:36
  • #2
When concreting onto the "old" concrete, no proper bond is achieved. Gluing and/or screwing is better. The residual moisture should simply be measured. However, it should be okay after that time.
 

julianpe

2020-04-24 11:14:35
  • #3
Are there alternatives to OSB boards for leveling?
 

rick2018

2020-04-24 11:32:40
  • #4
Of course there are alternatives. Whether they make sense is more the question. Theoretically, this is also possible with the top layer if it is available in sufficient thickness... What don't you like about OSB as a substructure?
 

bauenmk2020

2020-04-24 18:00:18
  • #5
We currently have a concrete staircase with glued wooden steps in our rental building. However, since almost all of them are "loose," the previous tenant connected and screwed the treads and risers together with an angle bracket each. When walking on the stairs, you can hear that not all the wooden steps are still holding. Without having any further experience, as a layman I would say: Screw the "compensation layer" onto the concrete and glue the wooden steps. Presumably, wood-to-wood glued holds better than wood-to-concrete.
 

Bookstar

2020-04-24 21:36:21
  • #6
I agree! It is definitely dry in any case
 

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