ᐅ Is it possible to apply exterior plaster before interior plaster during summer?

Good evening,

a quick question:

Is it possible to apply the exterior plaster before the interior plaster?
Today, the roof framework was installed, and the windows will be delivered by the end of the week.

I would like to have the exterior plaster applied now so that the scaffolding can be removed afterward (of course, only if the roofer is finished by then).

The interior work will take a bit longer, as the plumbing company is on holiday.

To keep the scaffolding costs as low as possible (around 120€ per week), this is our idea.

From my research online, I only found that traditionally, the interior plaster was applied first and then the exterior, to allow moisture to escape better. However, nowadays the interior plaster can dry better with proper ventilation.

We used Poroton blocks 36.5cm (14.4 inches).

Thank you all.

That’s definitely possible. Provided that all the electrical wiring and plumbing you’ll need later (including an outdoor water tap!) are already installed within the exterior walls. And if you have gas, the necessary emergency shut-off valve (or whatever it might be) should also be installed beforehand. Oh, and don’t forget the window sills.

Hello,
That could be possible! How dry are the exterior walls? Would it be better to let them dry out first?
After applying the interior plaster and installing the screed, I would recommend using a few construction dehumidifiers in addition to regular ventilation.
Best regards

We received the exterior plaster already in May. The screed and interior plaster followed four weeks later, at the beginning of June. The windows were installed. Then the construction paused for a full six weeks. Only air and patience. No dryers. Work resumed at the end of July, and I think the house is really dry now. For example, cardboard no longer feels damp when left inside the house. It just takes some patience and good ventilation. Karsten

Maria16 schrieb:
That’s definitely possible. Provided that all the electrical wiring and plumbing you’ll need later (like an outdoor water tap!) are already installed inside the exterior walls. And if you have gas, the necessary emergency shut-off valve (or whatever it is called) should also be installed beforehand. Oh, and don’t forget the window sills.

Thank you, I planned to order the window sills today and have them installed. I’ll also check on the electrical and plumbing connections today.

Yilmaz schrieb:
Hello,
That could work! How dry are the exterior walls? Better to let them dry first?
After applying the interior plaster and installing the screed, I would recommend using a few dehumidifiers in addition to regular ventilation.
Best regards

Since they are Poroton bricks, they are actually quite dry (as long as it’s not raining, because then they absorb a lot of water).

Nordlys schrieb:
We had the exterior plaster applied back in May. The screed and interior plaster were done four weeks later, at the beginning of June. The windows were already installed. Then the construction was left untouched for a full six weeks. Just ventilation and patience. No dehumidifiers. Work resumed at the end of July, and I think the house is really nicely dry now. For example, cardboard doesn’t get damp anymore when left inside the house. It just takes some patience and good cross-ventilation. Karsten

Thank you, Karsten, that’s basically how we wanted to proceed. After the interior plaster, did you ventilate from time to time or keep the windows practically open all day?

The windows were always left slightly open, day and night.