ᐅ Insulation for Fast-Track Home Construction

Hello everyone,
I have some concerns about my house construction.
We started building about a month ago, and now the shell is almost complete. The roof structure is scheduled to be installed next week. The house is being built with 24cm (9.5 inches) Poroton T12 masonry. Today, I learned from the construction company manager that they want to have the house ready to move into by December, including insulation. The insulation is planned to be 12cm (5 inches) thick mineral wool. I’m worried that this might be moving too fast because there has been heavy rain in recent days, and part of the masonry has become quite wet. What should I be aware of if the house is finished so quickly? Should I wait before moving in and leave the windows open for a few months to let the house dry out, or does anyone have other advice for me?

P.S. We will have a gas boiler with underfloor heating, but no ventilation system.
Best regards, Lukas

I think you should trust your site manager. If they say the walls are dry enough for insulation, then they probably are. And even if they're not, opening your windows will likely do little to help, especially since the outdoor air tends to be quite humid in autumn.

I believe the experience of the site manager is crucial here as well. I would trust them because they’ve done this more than once. In fact, it’s actually a good thing that the construction is finishing so quickly.

Today, building quickly is also a matter of cost. In the past, construction was halted during winter, allowing the shell to dry out properly. Nowadays, buildings are occupied immediately after completion to save on rent. I would recommend using a construction dryer and ensuring thorough ventilation.

Make sure to let it dry out thoroughly first. Moving in immediately after construction will cause problems. This is especially harmful to the insulation when there is high humidity. Ventilating won’t help much in that case; it’s better to use a construction dehumidifier.

If you trust the construction manager, you can rely on them. I would take a calm approach and allow the house to dry out. Rushing will not help in this case.