I am in the process of replacing the casing on the windows, is it okay if they are left open even if it starts to rain a bit? Or do I need to put up some sort of protection, e.g. age-resistant tape?
This is a wooden house with a Mexitegel facade from 1970.
I'm in the middle of changing the facade and check the weather forecast about 3 times a day. What I want to know is the risk of rain and especially where it's blowing from and how much. Light rain from above doesn't matter, but with wind, you want to know if it will hit the facade side you have open. In that case, I often use pieces of building plastic that I staple on as rain protection. Quick and easy to put up and take down with typical Swedish "midsummer weather."
Maybe a bit more troublesome to attach to a brick facade, of course...
If you're going to paint the wood, you don't want it to get wet.
And if there are heavy downpours, you also don't want to flood water into the construction. There's a difference between a few isolated raindrops and a "garden hose drenching."
I have thought that the facade of this house doesn't really have much significance beyond appearance, and thus it doesn't matter if something gets inside the brick facade. But I could absolutely be wrong!
Weather forecasts are quite unreliable, but sure, if you check them every other hour, they might provide something. However, I think it's better to buy tape and put it up. I would have gladly avoided that job, partly because it makes it harder to fit the trim. But if it's deemed necessary to put it up, then of course, it must be put up.
Right now, SMHI is saying there's at most a 20-30% risk of rain often around 1-2 mm, but there are also occasional forecasts that mention 5 mm.
The picture with the trim was only during fitting, it is now disassembled and ready to be painted. However, the picture shows the overhang, which I thought might be interesting.
I see now that SMHI is warning of downpours with 40-50 mm, but if you look at the weather forecast, it doesn't mention it there, so I assume it doesn't apply to this area.
I have thought that the facade of this house doesn't really have much significance other than appearance, and therefore it doesn't matter if something gets behind the brick facade. But I could definitely be wrong!
The brick facade is a Potemkin facade. It's a typical wooden frame behind + MU. This means that if moisture gets behind the brick, the wooden frame can rot, and all materials can become moldy. So, regardless of the facade, you don't want moisture getting behind it.
For me, having a wooden facade painted with slamfärg, it's immediately evident after each rain where/on which sides of the facade and how high up on the facade the rain has hit. This means that after a couple of years, you learn where it usually hits, which in our case is southwest. Unfortunately, this doesn't help against summer downpours, as it seems like jet streams of air follow the rain downward and then spread in all directions at ground level, resulting in horizontal rain from all directions simultaneously...
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