Bitumen is leaking from the ground joint - a serious defect?

  • Erstellt am 2009-09-12 19:58:46

Christian_Muc

2009-09-12 19:58:46
  • #1
Hello,

a few days ago we viewed a new building project (single-family house). I do not yet have the construction specification, only the exposé.

Allegedly it is a Kfw60 house, certificate available on request, basement as a white tank.

In the basement I immediately noticed that in several places (external and internal walls) black sauce had leaked out onto the floor at the side joints and had pushed past the tile grout, partly it was still moist. Oily-sticky consistency, it doesn't smell like anything, but it doesn't look good.

The agent said after a short phone call that these were bitumen residues that had been pushed up due to insufficient drying; after the call he said the owner will repair the joints free of charge.

The agent himself seems "shrewd" to me, but he has been in the business here as a developer for 40 years and if he had something to hide, he would certainly have roughly eliminated this spot before the viewing. In addition, the property is very expensive (location). Therefore, I tend to believe him. As a layperson, however, I am very uncertain.

What do the experts think? Is this tolerable or could there be a serious construction defect behind it?
 

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