ᐅ Construction of a wooden beam floor for a two-story single-family house with a pitched roof.

Hello,

We recently celebrated the topping-out ceremony for our two-story single-family house about 10 days ago.

However, I have some concerns regarding the construction of the wooden beam ceiling:

- The carpenter installed a walkable floor directly on the beams across the entire area, using OSB 3 boards.
- The boards are attached directly to the beams, with no battens in between.

Full insulation between the beams is planned later during the interior finishing, along with a vapor barrier, battens, and drywall. The attic itself will not be heated. The roof slopes will not be insulated.

I am worried that, due to the lack of ventilation and the vapor-tight OSB boards installed directly on top of the insulation, condensation and mold could develop. Is this design faulty, does it comply with building regulations (building permit/planning permission), or am I overreacting? What do you think?

Paulus16 schrieb:
-The panels are attached directly to the beams. No battens in between. [...] I am concerned that due to the lack of ventilation [...] Is this construction faulty, does it comply with the building regulations,

What would you use battens for at this point? – I would say that the "missing" ventilation here actually complies with the regulations

---

https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/

I would not want it like that: The insulation should only be covered on the top with a significantly lower Sd-value than on the bottom.

I would have also preferred tongue and groove boards. The concerns about moisture affecting the OSB panels are not entirely unfounded.

Is the issue related to the material of the OSB boards or to the lack of ventilation?

What do you want to use battens for at this point? – I would say that the “missing” ventilation here actually complies with the regulations.

Why do you think so? Could you please explain further?