Why are there wet spots on the facade?

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Please help identify the problem. House of 375mm D500 aerated concrete blocks, insulated with 100mm of pps. Reinforcement, facade dowels. Attic room unheated, the overlap of monolithic. In winter it was stably heated, the temperature inside is kept at 22-25 degrees.

The other day after heavy precipitation noticed that in some places where facade dowels were mounted, the water broke through. There are two possibilities – or it is condensate, or under the insulation flows water (maybe where the foam joints are bad).

The house has not yet installed the eaves, no soffit, exterior trim, not assembled drainage. There is an unheated porch adjoining one of the walls of the house. This wall does not receive precipitation at all. It is always and completely dry, nothing gets wet. As I assume, assuming it's condensation, it should show up on it as well. On the inside, with the exception of the places on the soffits where the outside should have tills, all the walls of the house are completely dry. There are places where the block is not finished with anything on the inside yet, and it's okay there, the block is dry.Among other things, looked at the small section of the block on the front, where the styrofoam is temporarily absent (when they installed the gas pipe, they had to cut it out). Condensation is also not noticed...

How to determine exactly what is the cause of moisture?




So you observe under what conditions these spots appear. If it rained and the wall got wet, then the next day the wall dried up, and some spots remain – then yes, it is deeply planted dowels. The layer of glue is large in this place and the water just did not have time to come out.


 It's okay, it's a feature of an EIFS facade. Dowels glow and will glow in the off-season after rain, after fog, etc.

Another thing is that 100mm of insulation for your walls is too little!

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